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Artykuły w czasopismach na temat „OSCILLATOR CIRCUIT”

Autor: Grafiati

Data publikacji: 11 września 2023

Data aktualizacji: 25 lipca 2025

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1

Chien, Hung-Chun. "New Realizations of Single OTRA-Based Sinusoidal Oscillators." Active and Passive Electronic Components 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/938987.

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This study proposes three new sinusoidal oscillators based on an operational transresistance amplifier (OTRA). Each of the proposed oscillator circuits consists of one OTRA combined with a few passive components. The first circuit is an OTRA-based minimum RC oscillator. The second circuit is capable of providing independent control on the condition of oscillation without affecting the oscillation frequency. The third circuit exhibits independent control of oscillation frequency through a capacitor. This study first introduces the OTRA and the related formulations of the proposed oscillator cir

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2

Usanov, Dmitrij, Sergej Venig, Sergej Gorbatov, and Eduard Trufakin. "Output signal spectra of the Gunn-diode oscillator at the mode of lf and microwave oscillation." Izvestiya VUZ. Applied Nonlinear Dynamics 9, no. 3 (2001): 32–38. http://dx.doi.org/10.18500/0869-6632-2001-9-3-32-38.

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Results of experimental research of multifrequency LF oscillation (arising in the microwave Gunn oscillatior feed circuit) influence on output signal spectrum of the Gunn oscillator are presented. Conditions of such oscillation excitation in the circuit of the oscillator are described theoretically. It was shown that the Gunn oscillator output signal may be both predominantly amplitude-modulated and frequency-modulated.

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3

Horng, Jiun-Wei. "Quadrature Oscillators Using Operational Amplifiers." Active and Passive Electronic Components 2011 (2011): 1–4. http://dx.doi.org/10.1155/2011/320367.

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Two new quadrature oscillator circuits using operational amplifiers are presented. Outputs of two sinusoidal signals with 90° phase difference are available in each circuit configuration. Both proposed quadrature oscillators are based on third-order characteristic equations. The oscillation conditions and oscillation frequencies of the proposed quadrature oscillators are orthogonally controllable. The circuits are implemented using the widely available operational amplifiers which results in low output impedance and high current drive capability. Experimental results are included.

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4

Abuelma'atti, Muhammad Taher, and Muhammad Haroon Khan. "Grounded Capacitor Oscillators Using A Single Operational Transconductance Amplifier." Active and Passive Electronic Components 19, no. 2 (1996): 91–98. http://dx.doi.org/10.1155/1996/17943.

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New oscillator circuits using operational transconductance amplifiers (OTAs) are presented. Each circuit uses a single OTA and grounded capacitors. The feasibility of obtaining oscillators with independent control of frequency and oscillation is considered. Also, the feasibility of exploiting, to advantage, the frequency dependence of the OTA-transconductance is considered. This may result in OTA-based RC oscillators using only one externally-connected capacitor.

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5

Pathak, J. K. "Two New Single-Resistor-Controlled Quadrature Sinusoidal Oscillators using Current-Differencing-Buffered-Amplifiers." International Journal of Advance Research and Innovation 5, no. 2 (2017): 87–94. http://dx.doi.org/10.51976/ijari.521716.

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Two new single resistor–controlled quadrature oscillator (SRCQO) circuits using only two current differencing buffered amplifiers (CDBAs) as active elements and only three resistors and two capacitors, are presented. First proposed circuit uses all input terminals of the CDBA to exploit full capacity of the CDBAs, offers better sensitivities with respect to active parameters and has wide frequency range of operation. The second proposed circuit provides very good low frequency performance with respect to total harmonic distortion. Separate single resistors can control both oscillation conditio

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6

Abuelma'atti, Muhammad Taher. "New Current-Mode Oscillators Using a Single Unity-Gain Current-Follower." Active and Passive Electronic Components 18, no. 3 (1995): 151–57. http://dx.doi.org/10.1155/1995/90218.

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A general circuit for realizing current-mode oscillators using a single negative unity-gain current-follower is presented. Using this circuit new oscillators of this class can be discovered systematically. Simulation results obtained from three new circuits are presented. The feasibility of obtaining a quadrature oscillator is investigated.

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7

Abuelmaatti, Muhammad Taher, and Muhammad Ali Al-Qahtani. "Active-Only Sinusoidal Oscillator Circuits." Active and Passive Electronic Components 24, no. 4 (2001): 223–32. http://dx.doi.org/10.1155/2001/69690.

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Two new active-only sinusoidal oscillator circuits are proposed. The first circuit uses one current feedback operational amplifier (CFOA) and four operational transconductance amplifiers (OTAs). The second circuit uses only four OTAs. Without using any external passive elements, voltage (or current) control of the frequency and condition of oscillation, of the two circuits, can be achieved by adjusting the bias currents of the OTAs. The proposed circuits enjoy low sensitivities.

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8

Gan, Kwang Jow, Zheng Jie Jiang, Cher Shiung Tsai, et al. "Design of NDR-Based Oscillators Suitable for the Nano-Based BiCMOS Technique." Applied Mechanics and Materials 328 (June 2013): 669–73. http://dx.doi.org/10.4028/www.scientific.net/amm.328.669.

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We present three oscillator designs using the negative-differential-resistance (NDR) circuit which is composed of several Si-based metal-oxide-semiconductor field-effect transistor (MOS) devices and one SiGe-based heterojunction bipolar transistor (HBT) devices. These oscillator circuits are composed of the NDR circuit, resistor, inductor, and capacitor. The oscillation frequencies are about several GHz based on the HSPICE simulation results. The circuits are designed using a standard 0.18 μm BiCMOS technique. Because our circuits are mainly made of a BiCMOS-NDR circuit that is different from

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9

Abuelma'atti, Muhammad Taher, Abdulrahman Khalaf Al-Ali, Sami Saud Buhalim, and Syed Tauseef Ahmed. "Digitally Programmable Partially Active-R Sinusoidal Oscillators." Active and Passive Electronic Components 17, no. 2 (1994): 83–89. http://dx.doi.org/10.1155/1994/23230.

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New, simple sinusoidal oscillator circuits are proposed. Each circuit uses an internally compensated operational amplifier, a resistor, and a capacitor. The feasibility of obtaining digitally programmable sinusoidal oscillation is studied and a new digitally programmable capacitorless resistorless sinusoidal oscillator is developed.

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10

I'msaddak, Lobna, Dalenda Ben Issa, Abdennaceur Kachouri, Mounir Samet, and Hekmet Samet. "Infrared Oscillators in Conventional Carbon Nanotube FET Technology." Journal of Circuits, Systems and Computers 24, no. 04 (2015): 1550053. http://dx.doi.org/10.1142/s021812661550053x.

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This paper presents the design of C-CNTFET oscillator's arrays for infrared 'IR' technology. These arrays are contained by both of the LC-tank and the voltage control 'coupled N- and P-type C-CNTFET LC-tank' oscillators. In this paper, the analysis of the impact of CNT diameter variations and the nonlinear capacitances (C GD and C GS ) were introduced, especially on propagation time, oscillation frequency and power consumption. The C-CNTFET inverter, ring oscillator, LC-tank and coupled N- and P-type C-CNTFET LC-tank oscillator structures were designed and their speeding and performances have

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11

Liu, Rui Hong, and Chih Hsiung Shen. "A High Resolution Vernier Ring Oscillator with Ultra-Low Temperature Drift." Advanced Materials Research 542-543 (June 2012): 795–99. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.795.

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Nowadays, the precise measurement of the time interval between two events with very fine timing resolution is common challenge in the test and measurement instrumentation. This paper present a new high resolution vernier ring oscillator(VRO), which can measures the clock jitter as the operation temperature rises.The goal of this work focuses on the design of a TDC of temperature stable oscillator and we propose an ultra-low temperature drift of a differential delay cell oscillator based on a proportional to absolute temperature(PTAT) compensation methodology. It is very desirable to have a sin

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12

Wang, San-Fu, Hua-Pin Chen, Yitsen Ku, and Chia-Ling Lee. "Versatile Voltage-Mode Biquadratic Filter and Quadrature Oscillator Using Four OTAs and Two Grounded Capacitors." Electronics 9, no. 9 (2020): 1493. http://dx.doi.org/10.3390/electronics9091493.

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This article presents a versatile voltage-mode (VM) biquad filter with independently electronic tunability. The proposed structure using one dual-output operational transconductance amplifier, three single-output operational transconductance amplifiers (OTAs) and two grounded capacitors was explored to derive a new VM quadrature oscillator with the independent control of the oscillation frequency and the oscillation condition. The proposed versatile VM biquad filter achieves nearly all of the main advantages: (i) simultaneous realizations of band-reject, band-pass, and low-pass from the same a

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13

Kumngern, Montree. "Current-Controlled Current-Mode Quadrature Oscillator Using Translinear Current Conveyors." IJITEE (International Journal of Information Technology and Electrical Engineering) 3, no. 1 (2019): 29. http://dx.doi.org/10.22146/ijitee.40875.

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In this paper, a current-mode quadrature oscillator using second-generation current conveyors (CCIIs) is presented. The proposed oscillator consists of two CCIIs, two grounded capacitors and two grounded resistors. The circuit is suitable for integrated circuit implementation by using grounded capacitors. In addition, a new current-controlled current-mode quadrature oscillator using two current controlled second generation current conveyors (CCCIIs) and two grounded capacitors can be obtained by replacing CCIIs and resistors series at X terminals with CCCIIs. The condition of oscillation and f

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14

Sanjay S Tippannavar, Halesh M R, and Pilimgole Sudarshan Yadav. "Implementation And Comparison of Different Stages of Current Starved CMOS Ring Oscillator – A Study." Journal of Electrical Engineering and Automation 5, no. 3 (2023): 343–61. http://dx.doi.org/10.36548/jeea.2023.3.004.

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The ring oscillators serves as the fundamental building blocks in both digital and analog circuit design, as its extensive use is found in various electrical systems, including phase-locked loops, frequency dividers, and clock generators. This study gives a general overview of the ring oscillator circuit, including its workings, uses, and important design considerations. The ring oscillator generates timing signals for synchronous operation and is often employed as a clock generator in digital systems. It may also be used as a frequency divider to separate higher frequencies into lower ones. A

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15

Abuelma'atti, Muhammad Taher. "An Emitter Follower Sinusoidal Oscillator Circuit." International Journal of Electrical Engineering & Education 32, no. 3 (1995): 265–72. http://dx.doi.org/10.1177/002072099503200307.

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An emitter follower sinusoidal oscillator circuit An emitter-follower oscillator circuit is analysed. Expressions for the frequency of oscillation and the condition of oscillation are obtained. Experimental results which confirm the theory are presented.

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16

Almatroud, Othman Abdullah, Victor Kamdoum Tamba, Giuseppe Grassi, and Viet-Thanh Pham. "An Oscillator without Linear Terms: Infinite Equilibria, Chaos, Realization, and Application." Mathematics 9, no. 24 (2021): 3315. http://dx.doi.org/10.3390/math9243315.

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Oscillations and oscillators appear in various fields and find applications in numerous areas. We present an oscillator with infinite equilibria in this work. The oscillator includes only nonlinear elements (quadratic, absolute, and cubic ones). It is different from common oscillators, in which there are linear elements. Special features of the oscillator are suitable for secure applications. The oscillator’s dynamics have been discovered via simulations and an electronic circuit. Chaotic attractors, bifurcation diagrams, Lyapunov exponents, and the boosting feature are presented while measure

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17

Lu, Yimin, Xianfeng Huang, Shaobin He, Dongdong Wang, and Bo Zhang. "Memristor Based van der Pol Oscillation Circuit." International Journal of Bifurcation and Chaos 24, no. 12 (2014): 1450154. http://dx.doi.org/10.1142/s0218127414501545.

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The memristor is referred to as the fourth fundamental passive circuit element of which inherent nonlinear properties offer to construct the chaos circuits. In this paper, a flux-controlled memristor circuit is developed, and then a van der Pol oscillator is implemented based on this new memristor circuit. The stability of the circuit, the occurring conditions of Hopf bifurcation and limit circle of the self-excited oscillation are analyzed; meanwhile, under the condition of the circuit with an external exciting source, the circuit exhibits a complicated nonlinear dynamic behavior, and chaos o

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18

Pandiev, Ivailo Milanov. "Development of Two-Stage Quartz-Crystal Oscillators Using Monolithic Four-Terminal CFOAs." Electronics 11, no. 19 (2022): 3027. http://dx.doi.org/10.3390/electronics11193027.

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In this article, based on the well-known circuits of two-stage quartz-crystal oscillators, three electronic circuits with a small number of external components are presented. For the proposed circuit configurations, the active elements are composed of monolithic current-feedback operational amplifiers (CFOAs) with access to terminal z, between the first stage (positive second-generation current conveyor (CCII)) and the second stage (output buffer). In this way, the output signal for the developed circuits is obtained after the output buffer of the second CFOA, thereby providing a minimal effec

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19

Abuelma'atti, Muhammad Taher, and Muhammad Haroon Khan. "On The Realization of Low/High Frequency CCII+ Based Oscillators Employing Grounded Resistors and Lossy Capacitors." Active and Passive Electronic Components 17, no. 4 (1995): 269–74. http://dx.doi.org/10.1155/1995/19804.

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New RC oscillator circuits are presented. Each circuit uses two second-generation positive current-conveyors, three grounded capacitors and four grounded resistors. The circuits enjoy independent control of the frequency and the condition of oscillation and are very attractive for integration. The circuits can realize high and low frequencies of oscillation. Simulation results are included.

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20

SOLIMAN, AHMED M. "GENERATION OF THIRD-ORDER QUADRATURE OSCILLATOR CIRCUITS USING NAM EXPANSION." Journal of Circuits, Systems and Computers 22, no. 07 (2013): 1350060. http://dx.doi.org/10.1142/s0218126613500606.

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A systematic synthesis procedure for generating third-order grounded passive element quadrature oscillators is given. The synthesis procedure is based on using nodal admittance matrix (NAM) expansion applied to the Y matrix of a recently reported three Op Amp third-order oscillator circuit. Four new circuits using current conveyors (CCII) are reported. In addition four more new circuits using inverting current conveyors (ICCII) are also given. Many more quadrature third-order oscillator circuits using combinations of CCII and ICCII can be obtained. Simulation results demonstrating the practica

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21

Liang, Yan, Zeng Fu Zhang, Wen Liang Chen, and Ke Xin Xu. "Study of the Composite Oscillator of Particulate Monitoring Instrument Based on TEOM." Applied Mechanics and Materials 678 (October 2014): 274–80. http://dx.doi.org/10.4028/www.scientific.net/amm.678.274.

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The effects of atmospheric particulates were more prominent in recent years, so accurate monitoring of particulate matter was a problem needed to resolve. In the existing particulate monitoring instrument based on the principle of Tapered Element Oscillating Microbalance method (TEOM),the particle concentration detection system was tapered quartz tube simple harmonic oscillator. Due to the oscillator relying mainly on analog circuit closed-loop self-excitation oscillator to drive, loop resonance frequency, oscillation stability and Q value was greatly influenced by the oscillator physical char

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22

Kulapong, Worawut, Winai Jaikla, Surapong Siripongdee, Roman Sotner, Peerawut Suwanjan, and Amornchai Chaichana. "A New Method to Synthesise the Sinusoidal Oscillator Based on Series Negative Resistance-Capacitance and its Implementation Using a Single Commercial IC, LT1228." Elektronika ir Elektrotechnika 29, no. 3 (2023): 26–32. http://dx.doi.org/10.5755/j02.eie.33844.

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An alternative method for synthesising the sinusoidal oscillator based on series negative resistance-capacitance is presented in this paper. The proposed topology is constructed with the series negative resistance-capacitance circuit connected in parallel with a grounded resistor and capacitor. To validate the proposed method, a new grounded series negative resistance-capacitance simulator is also proposed as a subcircuit for synthesising the sinusoidal oscillator. The series negative resistance-capacitance simulator is based on a commercially available integrated circuit (IC), LT1228. The equ

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23

MEYRAND, PIERRE, and MAURICE MOULINS. "Phylogenetic Plasticity of Crustacean Stomatogastric Circuits: II. Extrinsic Inputs to the Pyloric Circuit of the Shrimp Palaemon Serratus." Journal of Experimental Biology 138, no. 1 (1988): 133–53. http://dx.doi.org/10.1242/jeb.138.1.133.

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The rhythmic motor patterns produced by the pyloric circuit of the shrimp Palaemon are substantially different from those of large decapods, although the homologous neuronal circuits are very similar (Meyrand & Moulins, 1988). The extrinsic inputs received by the Palaemon pyloric circuit were similar, at least qualitatively, to the extrinsic inputs known to impinge upon the pyloric circuit of large decapods. These include: rhythmic inputs that descend from another oscillator (the commissural pyloric oscillator, CPO) which appears to impose its own rhythm on neurones of the pyloric circuit;

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24

Wang, San-Fu, and Hua-Pin Chen. "New Voltage-Mode Sinusoidal Oscillators Using VDIBAs." Journal of Circuits, Systems and Computers 29, no. 04 (2019): 2050052. http://dx.doi.org/10.1142/s0218126620500528.

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This paper presents two new voltage-mode sinusoidal oscillators based on voltage differencing inverting buffered amplifier (VDIBA). The first proposed circuit exhibits independent and electronic control of oscillation condition by using the bias current of the VDIBA. The proposed configuration contains only single VDIBA, two grounded capacitors and two resistors, which are the least number of active components and the minimum number of passive components necessary for realizing voltage-mode oscillator topology. The second proposed circuit exhibits independent and electronic control on the cond

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25

Ustun, Arif Kivanc, Meltem Apaydın Üstün, and Reşat Mutlu. "A Liénard Oscillator Circuit with a Memristive Bridge Rectifier." European Journal of Engineering and Applied Sciences 7, no. 2 (2024): 126–34. https://doi.org/10.55581/ejeas.1602019.

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A novel Liénard oscillator design incorporating a bridge rectifier with an R-L-C output filter and negative resistance converter is presented. The bridge rectifier exhibits memristive behavior and provides the even nonlinear resistance required for Liénard oscillation in the periodic steady state. The circuit's mathematical model, including state-space equations and analysis of its nonlinear characteristics, is developed. LTSpice simulations demonstrate that at higher frequencies, the memristive bridge functions as a nonlinear resistor, enabling the circuit to operate as a Liénard oscillator.

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26

Abuelma'atti, Muhammad Taher, and Muhammad Haroon Khan. "New Electronically-Tunable Oscillator Circuit Using Only Two OTAs." Active and Passive Electronic Components 20, no. 4 (1998): 189–94. http://dx.doi.org/10.1155/1998/63168.

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New oscillator circuit using two operational transconductance amplifiers and grounded capacitors is presented. The oscillator circuit enjoys independent control of the frequency and the condition of oscillation. Experimental results confirming the presented theory are included.

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27

Lei, Yu, and Jian Feng Ai. "Application of Negative Resistance in the Inductor Feedback Oscillators Based on Multisim." Applied Mechanics and Materials 556-562 (May 2014): 1898–901. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.1898.

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By analyzing three-point oscillator of inductance feedback with the loss resistance of the inductor,we found the loss resistance of the inductor is a major factor in affecting circuit performance. Negative resistance in series with loss resistance can offset the impact of the loss resistance in the circuit. Oscillation circuit Start-up easilier. The quality factor Q increases and the selectivity is better.The oscillation shape closer to the ideal oscillator.

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28

Prochaska, M., A. Belski, and W. Mathis. "Design and Analysis of Fully Integrated Differential VCOs." Advances in Radio Science 3 (May 13, 2005): 359–63. http://dx.doi.org/10.5194/ars-3-359-2005.

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Abstract. Oscillators play a decisive role for electronic equipment in many fields - like communication, navigation or data processing. Especially oscillators are key building blocks in integrated transceivers for wired and wireless communication systems. In this context the study of fully integrated differential VCOs has received attention. In this paper we present an analytic analysis of the steady state oscillation of integrated differential VCOs which is based on a nonlinear model of the oscillator. The outcomes of this are design formulas for the amplitude as well as the stability of the

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29

Zhang, Lei, and Zhong Ming Pan. "Dual-Mode Quadrature Oscillator Using Current Follower Transconductance Amplifiers for GMI Sensors." Advanced Materials Research 712-715 (June 2013): 1886–90. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1886.

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For designing GMI sensors, realization of current/voltage-mode (dual-mode) quadrature sinusoidal oscillator with the employment of current follower transconductance amplifier (CFTA) as the active component is presented. The proposed circuit configuration comprising two CFTAs, one grounded resistor and two grounded capacitors can simultaneously provide two explicit quadrature output currents and two quadrature output voltages. Moreover, the proposed circuit topology enjoys the advantage of independent control of the condition of oscillation and frequency of oscillation and good active and passi

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30

Horng, Jiun-Wei. "Current-Mode Third-Order Quadrature Oscillator Using CDTAs." Active and Passive Electronic Components 2009 (2009): 1–5. http://dx.doi.org/10.1155/2009/789171.

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This paper describes a current-mode third-order quadrature oscillator based on current differencing transconductance amplifiers (CDTAs). Outputs of two current-mode sinusoids with90°phase difference are available in the quadrature oscillator circuit. The oscillation condition and oscillation frequency are orthogonal controllable. The proposed circuit employs only grounded capacitors and is ideal for integration. Simulation results are included to confirm the theoretical analysis.

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31

Li, Yon Gan, Zhan Ting Fan, and Xuan Ni Zhang. "A New Current-Mode Multiphase Sinusoidal Oscillator Using Adjoint Op-Amp." Applied Mechanics and Materials 182-183 (June 2012): 486–90. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.486.

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In order to get current-mode multiphase sinusoidal oscillator with high frequency, high accuracy, high stability and easy to be integrated, a multiphase sinusoidal oscillator circuit is presented. The oscillator can produce N output-currents (N being even or odd) with equal-amplitude and equal- phase spaced. The circuit uses adjoint Op-Amp, grounded capacitors and enjoys low passive sensitivities. The oscillation condition and frequency for the oscillator can be tuned independently. The simulated results are illustrated.

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32

Sato, Ryoichi, Yuta Kodera, Md Arshad Ali, Takuya Kusaka, Yasuyuki Nogami, and Robert H. Morelos-Zaragoza. "Consideration for Affects of an XOR in a Random Number Generator Using Ring Oscillators." Entropy 23, no. 9 (2021): 1168. http://dx.doi.org/10.3390/e23091168.

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A cloud service to offer entropy has been paid much attention to. As one of the entropy sources, a physical random number generator is used as a true random number generator, relying on its irreproducibility. This paper focuses on a physical random number generator using a field-programmable gate array as an entropy source by employing ring oscillator circuits as a representative true random number generator. This paper investigates the effects of an XOR gate in the oscillation circuit by observing the output signal period. It aims to reveal the relationship between inputs and the output throu

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33

Ishimura, Kazuyoshi, and Isao T. Tokuda. "Limited Effect of Noise Injection on Synchronization of Crystal Oscillators." Journal of Circuits, Systems and Computers 29, no. 02 (2019): 2050026. http://dx.doi.org/10.1142/s0218126620500267.

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Experimental study on noise-induced synchronization of crystal oscillators is presented. Two types of circuits were constructed: one consists of two Pierce oscillators that were isolated from each other and received a common noise input, while the other is based on a single Pierce oscillator that received a same sequence of noise signal repeatedly. Due to frequency detuning between the two Pierce oscillators, the first circuit showed no clear sign of noise-induced synchronization. The second circuit, on the other hand, generated coherent waveforms between different trials of the same noise inj

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34

Summart, Saksit, Supawadee Sirithai, Bongkan Vaisopha, and Adirek Jantakun. "Electronically Controlled Biquadratic Filter and Quadrature Oscillator Using CDTAs." International Journal of Engineering and Technology Innovation 12, no. 4 (2022): 322–35. http://dx.doi.org/10.46604/ijeti.2022.8230.

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This article presents a current-mode biquadratic filter and quadrature oscillator circuit based on current differencing transconductance amplifiers (CDTAs). The proposed circuit does not require changing the circuit topology. In addition to the low-pass filter, high-pass filter, band-pass filter, and sinusoidal quadrature signal, the proposed circuit has a pole frequency that can be controlled independently from the quality factor, while the oscillation frequency can be controlled non-interactively. The circuit impedance with high output can directly drive the load without using a current buff

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35

Ullah, Farman, Yu Liu, Zhiqiang Li, Xiaosong Wang, Muhammad Sarfraz, and Haiying Zhang. "A Bandwidth-Enhanced Differential LC-Voltage Controlled Oscillator (LC-VCO) and Superharmonic Coupled Quadrature VCO for K-Band Applications." Electronics 7, no. 8 (2018): 127. http://dx.doi.org/10.3390/electronics7080127.

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A novel varactor circuit exhibiting a wider tuning range and a new technique for quadrature coupling of LC-Voltage Controlled Oscillator (LC-VCO) is presented and validated on a 25 GHz oscillator. The proposed varactor circuit employs distribute-biased parallel varactors with a series inductor connected at both ends of the varactor bank to extend the tuning range of the oscillator. Similarly, the quadrature coupling is accomplished by employing the 2nd harmonic, explicitly generated in the stand-alone free-running differential oscillator using frequency doubler. As an example, the Differential

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Pandey, Rajeshwari, Neeta Pandey, Mayank Bothra, and Sajal K. Paul. "Operational Transresistance Amplifier-Based Multiphase Sinusoidal Oscillators." Journal of Electrical and Computer Engineering 2011 (2011): 1–8. http://dx.doi.org/10.1155/2011/586853.

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Multiphase sinusoidal oscillator circuits are presented which utilize Operational Transresistance Amplifier (OTRA) as the active element. The first circuit producesnodd-phase oscillations of equal amplitudes and equally spaced in phase. The second circuit is capable of producingnodd- or even- phase oscillations equally spaced in phase. An alternative approach is discussed in the third circuit, which utilizes a single-phase tunable oscillator circuit which is used to inject signals into a phase shifter circuits. An automatic gain control (AGC) circuit has been implemented for the second and thi

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37

Hernández, Silvia, Mabel Pontón, Sergio Sancho, and Almudena Suárez. "Analysis of high-order sub-harmonically injection-locked oscillators." International Journal of Microwave and Wireless Technologies 12, no. 8 (2020): 695–706. http://dx.doi.org/10.1017/s1759078720000768.

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AbstractHigh-order sub-harmonically injection-locked oscillators have recently been proposed for low phase-noise frequency generation, with carrier-selection capabilities. Though excellent experimental behavior has been demonstrated, the analysis/simulation of these circuits is demanding, due to the high ratio between the oscillation frequency and the frequency of the input source. This work provides an analysis methodology that covers the main aspects of the circuit behavior, including the detection of the locking bands and the prediction of the phase-noise spectral density. Initially, the os

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38

Cicekli, Hasan, and Ahmet Gokcen. "MOS-C Based Electronically Tuneable Current/Voltage-Mode Third Order Quadrature Oscillator and Biquadratic Filter Realization." Elektronika ir Elektrotechnika 27, no. 3 (2021): 38–49. http://dx.doi.org/10.5755/j02.eie.28921.

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This paper introduces a new electronically tuneable third order quadrature oscillator and biquadratic filter with MOS-C realization using all grounded passive components. Voltage-mode second order low-pass, high-pass, band-pass filters using second generation current conveyor and a current/voltage-mode third order quadrature sinusoidal oscillator using multi-output second generation current conveyor are synthesized from the proposed circuit topology. All synthesized circuits are compatible with integration and the center frequency can be electronically tuned by the gate voltage of the MOS tran

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39

Summatta, Chuthong, and Weera Rattanangam. "The reduction of input open-fault in a CMOS Schmitt-Trigger inverter." SNRU Journal of Science and Technology 14, no. 2 (2022): 245040. http://dx.doi.org/10.55674/snrujst.v14i2.245040.

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The failure of the CMOS Schmitt-trigger inverter open-fault and capacitor open-fault in the case of a CMOS Schmitt-trigger inverter oscillator circuit cause a self-oscillation of the device. It leads to the high frequency to be emitted on the output side, because the balance of internal smaller parasitic capacitance approximately 5 – 20 pF. In this article, the reduction of CMOS Schmitt-trigger inverter open-fault and capacitor open-fault in the case of a CMOS Schmitt-trigger inverter oscillator circuit is presented, by adding a capacitor between the Gate pin and Drain pin of Q1 by demonstrati

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40

Jaikla, Winai, Wichai Nramat, Amornchai Chaichana, Wasakorn Traiphat, and Peerawut Suwanjan. "Wien-Bridge Sinusoidal Oscillator with Electronic and Amplitude Controllability Using Single Off-the-shelf Integrated Circuit." Journal of Physics: Conference Series 3022, no. 1 (2025): 012014. https://doi.org/10.1088/1742-6596/3022/1/012014.

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Abstract The article proposes a design for a Wien-bridge sinusoidal oscillator. The design employs a single commercially available LT1228 integrated circuit (IC), along with four resistors and two capacitors. The proposed oscillator produces a sinusoidal output signal with a variable amplitude while providing the stability of both the oscillation frequency and conditions. No extra active components are necessary to realize this functionality, and the output impedance remains low. Its structure enables independent adjustment of both the oscillation frequency and the oscillation state. Experimen

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41

Abuelmaatti, Muhammad Taher. "Active-Only Sinusoidal Oscillator with Electronically-Tunable Fully-Uncoupled Frequency and Condition of Oscillation." Active and Passive Electronic Components 24, no. 4 (2001): 233–41. http://dx.doi.org/10.1155/2001/27076.

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A new active-only sinusoidal oscillator is presented. The oscillator circuit uses two internally compensated operational amplifiers, two plus-type second-generation current conveyors and three operational transconductance amplifiers. The proposed circuit enjoys the attractive features of totally uncoupled frequency and condition of oscillation, low sensitivities, electronic tunability and integratability.

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42

Channumsin, Orapin, and Worapong Tangsrirat. "Voltage Differencing Gain Amplifier-Based Sinusoidal Quadrature Oscillator Using Only Two Grounded Capacitors." Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) 12, no. 5 (2019): 439–44. http://dx.doi.org/10.2174/2352096512666181219121941.

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Background: This article describes the circuit construction of the sinusoidal quadrature oscillator using two Voltage Differencing Gain Amplifiers (VDGAs) as active devices. Methods: Since the presented oscillator circuit uses only two external grounded capacitors as passive elements, it is quite suitable for monolithic integration point of view. The condition of oscillation and the frequency of oscillation are non-interactive, and can be controlled electronically by tuning two separate biasing currents. Non-ideal analysis and sensitivity performance are also discussed. Results: The feasibilit

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Maheshwari, S. "Realization Approach for Sinusoidal Signal Generation and Circuit with Easy Control." Journal of Circuits, Systems and Computers 29, no. 02 (2019): 2050031. http://dx.doi.org/10.1142/s0218126620500310.

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A new approach for realizing sinusoidal signal with quadrature property is proposed, which employs simple analog building blocks and facilitates easy tuning of the oscillation frequency, through a gain factor. The proposed approach is used for realizing a novel quadrature oscillator circuit, which requires three current feedback operational amplifiers and passive components. The proposed circuit provides outputs at low impedance terminals, and benefits from easy control over the frequency of oscillation (FO), which depends on resistive ratio, rather than absolute resistor values. The frequency

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Lan, Di, Julio Dewdney, I.-Tsang Wu, Ivan Rivera, Adrian Avila, and Jing Wang. "Dual-frequency MEMS based Oscillator using a single ZnO-on-SOI Resonator." International Symposium on Microelectronics 2015, no. 1 (2015): 000740–44. http://dx.doi.org/10.4071/isom-2015-poster5.

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In this paper, an oscillator technology with high-Q MEMS resonator as its tank circuit is presented to validate its key functionality as a stable frequency reference across a wide spectrum of frequencies. Particularly, a piezoelectrically-transduced contour-mode MEMS resonator is strategically designed to operate at two distinct layout-defined mechanical modal frequencies (259.5MHz and 436.7MHz). These devices were characterized and modeled by an extracted equivalent LCR circuit to facilitate the design of the oscillator using a standard circuit simulator. For this preliminary study, the MEMS

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Petrashin, Pablo, Luis Toledo, Walter Lancioni, Piotr Osuch, and Tinus Stander. "Oscillation-Based Test Applied to a Wideband CCII." VLSI Design 2017 (May 24, 2017): 1–6. http://dx.doi.org/10.1155/2017/5075103.

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Oscillation-based testing (OBT) has been proven to be a simple, yet effective VLSI test for numerous circuit types. This paper investigates, for the first time, the application of OBT verification for second generation current conveyors (CCIIs). The OBT is formed by connecting the CCII into a simple Wien bridge oscillator and monitoring both the amplitude and frequency of oscillation. The fault detection rate, taking into account both the open and short circuit fault simulation analyses, indicates 96.34% fault coverage using a combination of amplitude and frequency output sensing in all techno

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Krizhanovski, V. G. "Current state and development trends of class E oscillators: an overview." Radiotekhnika, no. 212 (March 28, 2023): 134–40. http://dx.doi.org/10.30837/rt.2023.1.212.12.

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An analysis of the current state of power generators of the class E family was carried out. They include classes: inverse E (E-1), with an injection of harmonics – class EM, hybrid classes E/Fn and EFn, including those built based on an active distributed transformer scheme. New developments of such oscillators over the past five years are considered. Significant progress has been made in the development of new feedback schemes. The study of oscillator schemes with power summation and the use of synchronized oscillators is considered. In connection with the appearance of new active devices, ci

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Savelyev, S. V., and L. A. Morozova. "HIGH POWER CHAOTIC OSCILLATOR." Electronic engineering Series 2 Semiconductor devices 259, no. 4 (2020): 31–36. http://dx.doi.org/10.36845/2073-8250-2020-259-4-31-36.

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The article presents a novel design of a microwave chaotic oscillator. The oscillator contains an inertial converter for the nonlinear amplifier output signal that modulates the supply voltage of the transistor. When the inertia of the converter becomes less than 0.06, the oscillator demonstrates chaotic behavior. We present an experimental model of a chaotic oscillator based on a high power transistor 2T982A-2. The inertial converter circuit contains a diode that perform half-wave conversion of a part of the output signal and a RC circuit with a time constant equal to 0.05 of the duration of

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48

Buonomo, Antonio, and Alessandro Lo Schiavo. "ANALYSIS OF EMITTER COUPLED MULTIVIBRATORS." SYNCHROINFO JOURNAL 7, no. 5 (2021): 7–11. http://dx.doi.org/10.36724/2664-066x-2021-7-5-7-11.

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The purpose of this investigation is to develop a systematic nonlinear analysis of the circuit in Figure 1, as yet not available in the literature, obtaining an exact formula for the oscillation frequency. Then, we find the condition for the circuit to behave as a relaxation oscillator, or as a nearly sinusoidal oscillator, analyzing the circuit behavior around the equilibrium point through a circuit model accounting for the transistor intrinsic capacitances. A nonlinear analysis of the popular emitter-coupled multivibrator is performed, which is based on the classical discontinuity theory. Ex

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Kadlubowski, L. A., and P. Kmon. "Multichannel integrated circuit for time-based measurements in 28 nm CMOS." Journal of Instrumentation 19, no. 02 (2024): C02004. http://dx.doi.org/10.1088/1748-0221/19/02/c02004.

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Abstract This paper discusses the application-specific integrated circuit prototype dedicated to readout of hybrid pixel X-ray detectors. The circuit is fabricated in 28 nm CMOS technology and occupies 1.1 × 1.1 mm2 of silicon area. Each of 8 × 4 pixels present in the prototype includes an analog front-end and a digital block with two ring oscillators and their supporting circuits. The circuit can operate in single-photon counting mode or time-based measurement mode. The paper discusses in detail the design decisions that influenced the final in-pixel ring oscillator architecture and layout. M

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Boriskov, Petr, Andrei Velichko, Nikolay Shilovsky, and Maksim Belyaev. "Bifurcation and Entropy Analysis of a Chaotic Spike Oscillator Circuit Based on the S-Switch." Entropy 24, no. 11 (2022): 1693. http://dx.doi.org/10.3390/e24111693.

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This paper presents a model and experimental study of a chaotic spike oscillator based on a leaky integrate-and-fire (LIF) neuron, which has a switching element with an S-type current-voltage characteristic (S-switch). The oscillator generates spikes of the S-switch in the form of chaotic pulse position modulation driven by the feedback with rate coding instability of LIF neuron. The oscillator model with piecewise function of the S-switch has resistive feedback using a second order filter. The oscillator circuit is built on four operational amplifiers and two field-effect transistors (MOSFETs

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