Relevant bibliographies by topics / Audio-oscillator

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Audio-oscillator'

Author: Grafiati
Published: 5 June 2025
Last updated: 15 July 2025

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Journal articles on the topic "Audio-oscillator"

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Gao, Yinghao, Jinxia Feng, Yuanji Li, and Kuanshou Zhang. "Generation and Measurement of Squeezed Vacuum States at Audio-Band Frequencies." Applied Sciences 9, no. 7 (2019): 1272. http://dx.doi.org/10.3390/app9071272.

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Squeezed vacuum states at audio-band frequencies are important quantum resources for practical applications. We demonstrated the generation of squeezed vacuum states at the audio-band frequencies from a subthreshold optical parametric oscillator with a periodically poled KTiOPO4 crystal pumped by a homemade continuous wave single-frequency dual-wavelength laser. To detect squeezed vacuum states at audio-band frequencies, the influences of the local oscillator (LO) power, the common mode rejection ratio (CMRR) of balanced homodyne detectors, and the phase jitter between the LO and squeezed vacuum field on the measurement of squeezed vacuum states at audio-band frequencies were considered. By optimizing the LO power, improving the CMRR of photodetectors to 67 dB based on the design of differential fine-tuning circuit and adjustable bias voltage, and reducing the phase jitter between the LO and squeezed vacuum field to 1.7° with the help of the coherent locking technique, 6.1 ± 0.3 dB squeezed vacuum states at audio frequencies from 5 kHz to 20 kHz were generated. A 3.0 ± 0.3 dB phase squeezed vacuum state was obtained at the audio frequency of 3.5 kHz.
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Ohashi, Masamichi, and Masamichi Tsuchiya. "Recording/reproducing apparatus using reference oscillator for digital audio." Journal of the Acoustical Society of America 120, no. 3 (2006): 1165. http://dx.doi.org/10.1121/1.2355948.

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Atsuwe, B. A., and I. Ahemen. "Amplitude Modulation Network Design and Simulation for Analog Telecommunications Applications." Dutse Journal of Pure and Applied Sciences 11, no. 1a (2025): 380–95. https://doi.org/10.4314/dujopas.v11i1a.34.

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This paper presents amplitude modulation network design and simulation for analog telecommunications application. The design consists of three sections; a novel Amplitude modulator (Multiplier) which was designed using the logarithmic and anti-logarithmic amplifiers, the audio signal oscillator made up of phase-shift oscillator and the Radio frequency (RF) signal oscillator made up of Hartley oscillator. The complete system was simulated using Multisim software version 14.2 and modulation index calculated at under modulation, 100 percent modulation and over modulation which were compared with other literature where the complete AM modulator was designed using a diode as the multiplier, wien bridge circuit as the Audio signal Oscillator and colpitt oscillator as the RF signal Oscillator. Results show that the designed network 1 has output voltages 0.993mV at 100mV, X-Input and 10mV Y-Input to 6.223V at 2.5V at both X and Y input before decreasing to 5.974V at 3V XInput and 2V Y-Input, greater than the network 2 from literature. Also the modulation index (ɸ1) with values 0.56, 0.60, 1.00, 1.75, 2.15 as against (ɸ2) 0.4915, 0.6938, 0.9956, 1.4725 and 1.8042, while depth of modulation of this study (ß 1 ) has higher values of 56%, 60%, 100%, 175%, and 215% than modulation depth values of 49.15%, 69.38%, 99.56%, 147.25% and 180.42%, Except at 700mV message and 1V carrier amplitude where (ß 2 ) is higher than (ß 1 ), when compared with literature was found to be better than that of network 2. Overall, the designed AM modulator (Network 1) was found to be superior in performance in terms of Output Voltages and modulation Index. Also it is in line with standards with little deviation due to component variation. Recommendations were also made for further improvements to functionality.
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Gheorghe, A. C. "Guitar Audio Amplifier Using IC LM386." Scientific Bulletin of Electrical Engineering Faculty 19, no. 1 (2019): 33–35. http://dx.doi.org/10.1515/sbeef-2019-0007.

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AbstractThe paper proposes the development of a guitar audio amplifier that is made from a low-priced IC LM386 chip, this amplifier can also be used for radios and other electronic projects IC LM 386 is a reliable and versatile chip that can be used even to make an oscillator that can output sine or square waves. The purpose behind developing this guitar audio amplifier is to offer an easy and economical way to build a good sounding amplifier.
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Lazzarini, Victor, Damián Keller, and Marcelo Soares Pimenta. "Prototyping of Ubiquitous Music Ecosystems." Journal of Cases on Information Technology 17, no. 4 (2015): 73–85. http://dx.doi.org/10.4018/jcit.2015100105.

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This paper focuses on the prototyping stage of the design cycle of ubiquitous music ecosystems. The authors present three case studies of prototype deployments for creative musical activities. The first case exemplifies a ubimus system for synchronous musical interaction using a hybrid Java-JavaScript development platform, mow3s-ecolab. The second case study makes use of the HTML5 Web Audio library to implement a loop-based sequencer. The third prototype—a sine-wave oscillator—provides an example of using the Chromium open-source sand-boxing technology Portable Native Client (PNaCl) platform for audio programming on the web. This new approach involved porting the Csound language and audio engine to the PNaCl web technology. The PNaCl Csound environment provides programming tools for ubiquitous audio applications that go beyond theWeb Audio framework. The limitations and advantages of the three approaches proposed—the hybrid Java/JavaScript environment, the HTML5 audio library and the PNaCl Csound infrastructure—are discussed in the context of rapid prototyping of ubimus ecosystems.
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Khalid, A. Humood, A. Imran Omar, and M. Taha Adnan. "Design and simulation of high frequency colpitts oscillator based on BJT amplifier." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 1 (2020): 160–70. https://doi.org/10.11591/ijece.v10i1.pp160-170.

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Frequency oscillator is one of the basic devices that can be used in most electrical, electronics and communications circuits and systems. There are many types of oscillators depending on frequency range used in an application such as audio, radio and microwave. The needed was appeared to use high and very high frequencies to make the rapid development of advanced technology Colpitts oscillator is one of the most common types of oscillator, it can be used for radio frequency (RF), that its output signal is often utilized at the basic of a wireless communication system in most application. In this research, a Colpitts oscillator is comprised from a bipolar junction transistor (BJT) amplifier with LC tank. This design is carrying out with a known Barkhausen criterion for oscillation. Firstly, is carried out using theoretical calculation. The secondary is carried out using simulation (Multisim 13). All the obtained result from the above two approaches are 10 MHz and 9.745 MHz respectively. This result is seen to be very encouraging.
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Thit, Waso Khine. "Designing Class a Colpitts Oscillator and Analyzing the Effect of DC Power Supply on its Frequency Stability." International Journal of Trend in Scientific Research and Development 3, no. 5 (2019): 2353–55. https://doi.org/10.5281/zenodo.3591455.

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Oscillator circuit is one that converts DC power into AC power at a frequency without any input signal. Oscillators are commonly used in communication systems to generate carrier frequency ranging from audio frequency 20 Hz to radio frequency 100G Hz . There are two main classes of oscillators, harmonic oscillator with sinusoidal output e.g. sine wave and relaxation oscillator with non sinusoidal output e.g. square wave, triangle wave, etc. . In this paper, class A Colpitts oscillator with LC feedback circuit is designed as a radio frequency oscillator to generate the output signals at 5M Hz. After designing, this circuit is simulated with Multisim software to analyze the effect of power supply on its frequency stability. Three supply voltages, 14 V, 12 V and 10 V are set as sample parameters to analyze the variation of frequency and voltage of the output signal. Changing DC power supply one by one as the above selected parameters in Multisim, the change of value of frequencies are noted and output signal results are also shown with the help of virtual oscillator. Thit Waso Khine "Designing Class a Colpitts Oscillator and Analyzing the Effect of DC Power Supply on its Frequency Stability" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-5 , August 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28022.pdf
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Li, XiaoFu, Md Raf E. Ul Shougat, Scott Kennedy, et al. "A four-state adaptive Hopf oscillator." PLOS ONE 16, no. 3 (2021): e0249131. http://dx.doi.org/10.1371/journal.pone.0249131.

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Adaptive oscillators (AOs) are nonlinear oscillators with plastic states that encode information. Here, an analog implementation of a four-state adaptive oscillator, including design, fabrication, and verification through hardware measurement, is presented. The result is an oscillator that can learn the frequency and amplitude of an external stimulus over a large range. Notably, the adaptive oscillator learns parameters of external stimuli through its ability to completely synchronize without using any pre- or post-processing methods. Previously, Hopf oscillators have been built as two-state (a regular Hopf oscillator) and three-state (a Hopf oscillator with adaptive frequency) systems via VLSI and FPGA designs. Building on these important implementations, a continuous-time, analog circuit implementation of a Hopf oscillator with adaptive frequency and amplitude is achieved. The hardware measurements and SPICE simulation show good agreement. To demonstrate some of its functionality, the circuit’s response to several complex waveforms, including the response of a square wave, a sawtooth wave, strain gauge data of an impact of a nonlinear beam, and audio data of a noisy microphone recording, are reported. By learning both the frequency and amplitude, this circuit could be used to enhance applications of AOs for robotic gait, clock oscillators, analog frequency analyzers, and energy harvesting.
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Hameed, Abbas Salman. "A High Secure Speech Transmission Using Audio Steganography and Duffing Oscillator." Wireless Personal Communications 120, no. 1 (2021): 499–513. http://dx.doi.org/10.1007/s11277-021-08470-8.

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Humood, Khalid A., Omar A. Imran, and Adnan M. Taha. "Design and simulation of high frequency colpitts oscillator based on BJT amplifier." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 1 (2020): 160. http://dx.doi.org/10.11591/ijece.v10i1.pp160-170.

Full text
Abstract:
Frequency oscillator is one of the basic devices that can be used in most electrical, electronics and communications circuits and systems. There are many types of oscillators depending on frequency range used in an application such as audio, radio and microwave. The needed was appeared to use high and very high frequencies to make the rapid development of advanced technology Colpitts oscillator is one of the most common types of oscillator, it can be used for radio frequency (RF), that its output signal is often utilized at the basic of a wireless communication system in most application. In this research, a Colpitts oscillator is comprised from a bipolar junction transistor (BJT) amplifier with <strong>LC</strong> tank. This design is carrying out with a known Barkhausen criterion for oscillation. Firstly, is carried out using theoretical calculation. The secondary is carried out using simulation (Multisim 13). All the obtained result from the above two approaches are 10 MHz and 9.745 MHz respectively. This result is seen to be very encouraging.
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Dissertations / Theses on the topic "Audio-oscillator"

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Fitzpatrick, Justin Jennings. "Analysis and Design of Low-Jitter Oscillators." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd369.pdf.

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Miri, Lavasani Seyed Hossein. "Design and phase-noise modeling of temperature-compensated high frequency MEMS-CMOS reference oscillators." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/41096.

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Frequency reference oscillator is a critical component of modern radio transceivers. Currently, most reference oscillators are based on low-frequency quartz crystals that are inherently bulky and incompatible with standard micro-fabrication processes. Moreover, their frequency limitation (<200MHz) requires large up-conversion ratio in multigigahertz frequency synthesizers, which in turn, degrades the phase-noise. Recent advances in MEMS technology have made realization of high-frequency on-chip low phase-noise MEMS oscillators possible. Although significant research has been directed toward replacing quartz crystal oscillators with integrated micromechanical oscillators, their phase-noise performance is not well modeled. In addition, little attention has been paid to developing electronic frequency tuning techniques to compensate for temperature/process variation and improve the absolute frequency accuracy. The objective of this dissertation was to realize high-frequency temperature-compensated high-frequency (>100MHz) micromechanical oscillators and study their phase-noise performance. To this end, low-power low-noise CMOS transimpedance amplifiers (TIA) that employ novel gain and bandwidth enhancement techniques are interfaced with high frequency (>100MHz) micromechanical resonators. The oscillation frequency is varied by a tuning network that uses frequency tuning enhancement techniques to increase the tuning range with minimal effect on the phase-noise performance. Taking advantage of extended frequency tuning range, and on-chip temperature-compensation circuitry is embedded with the sustaining circuitry to electronically temperature-compensate the oscillator. Finally, detailed study of the phase-noise in micromechanical oscillators is performed and analytical phase-noise models are derived.
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Klecl, Martin. "Digitální elektronický hudební syntezátor s analogovým řízením pro platformu Eurorack." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-399607.

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This work explores the topic of digital audio signal processing for modular synthesizers and the design of digital oscillator for modular standard known as Eurorack. Introduction of the theoretical part is dedicated to basic terms and blocks used in modular synthesizers. The thesis also characterizes and presents the methods of sound synthesis. The second part of the theory concerns analog and digital signal conversion made by digital signal processors DSP, focusing on ARM with focus on ARM architecture. The practical part of the thesis concerns design and construction of the digital oscillator which generates periodic waveforms without aliasing distortion. The oscillator also allows several types of modulations and waveforming and the module has several inputs for connecting control voltages or external audio signals.
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"A 280 mW, 0.07 % THD+N Class-D Audio Amplifier Using a Frequency-Domain Quantizer." Doctoral diss., 2011. http://hdl.handle.net/2286/R.I.9517.

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abstract: Pulse Density Modulation- (PDM-) based class-D amplifiers can reduce non-linearity and tonal content due to carrier signal in Pulse Width Modulation - (PWM-) based amplifiers. However, their low-voltage analog implementations also require a linear- loop filter and a quantizer. A PDM-based class-D audio amplifier using a frequency-domain quantization is presented in this paper. The digital-intensive frequency domain approach achieves high linearity under low-supply regimes. An analog comparator and a single-bit quantizer are replaced with a Current-Controlled Oscillator- (ICO-) based frequency discriminator. By using the ICO as a phase integrator, a third-order noise shaping is achieved using only two analog integrators. A single-loop, singlebit class-D audio amplifier is presented with an H-bridge switching power stage, which is designed and fabricated on a 0.18 um CMOS process, with 6 layers of metal achieving a total harmonic distortion plus noise (THD+N) of 0.065% and a peak power efficiency of 80% while driving a 4-ohms loudspeaker load. The amplifier can deliver the output power of 280 mW.<br>Dissertation/Thesis<br>Ph.D. Electrical Engineering 2011
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Book chapters on the topic "Audio-oscillator"

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Hickman, Ian. "Low distortion audio oscillator." In Hickman's Analog and RF Circuits. Elsevier, 1998. http://dx.doi.org/10.1016/b978-075063742-8/50010-5.

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Blechman, Fred. "A Variable Frequency Audio Oscillator." In Simple, Low-cost Electronics Projects. Elsevier, 1998. https://doi.org/10.1016/b978-0-08-051714-8.50011-7.

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Volos, Christos, Ioannis Kyprianidis, Ioannis Stouboulos, and Viet-Thanh Pham. "Radio Frequency Chaotic Circuit Design." In Advances in Computer and Electrical Engineering. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-6627-6.ch015.

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In recent decades the design of nonlinear circuits, which are capable of generating chaotic oscillations from audio frequencies up to the optical band, is a great challenge due to their use as sources of chaotic carriers in a variety of applications. Therefore, this chapter is dedicated to this class of circuits. A brief history of the first nonlinear circuits, which were the most important stages in the evolution of chaotic circuits, is given at the beginning of the chapter. Next, one of the most well known nonlinear circuits, the circuit of Colpitts oscillator, and its modifications, operating from a few Hertz up to the microwave region, are described in detail. A novel modification of Colpitts oscillator, which has higher fundamental frequency than the others do and greater Lyapunov dimension is also studied. Finally, some interesting applications of this class of circuits are presented at the end of this chapter.
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Konar, Amit, Aruna Chakraborty, Pavel Bhowmik, Sauvik Das, and Anisha Halder. "Emotion Recognition from Facial Expression and Electroencephalogram Signals." In Cross-Disciplinary Applications of Artificial Intelligence and Pattern Recognition. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-61350-429-1.ch017.

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This chapter proposes new approaches to emotion recognition from facial expression and electroencephalogram signals. Subjects are excited with selective audio-visual stimulus, responsible for arousal of specific emotions. Manifestation of emotion which appears in facial expression and EEG are recorded. Subsequently the recorded information is analyzed for extraction of features, and a support vector machine classifier is used to classify the extracted features into emotion classes. An alternative scheme for emotion recognition directly from the electroencephalogram signals using Duffing Oscillator is also presented. Experimental results are given to compare the relative merits of the proposed schemes with existing works.
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Graf, Rudolf F. "Audio Oscillators." In Oscillator Circuits. Elsevier, 1997. https://doi.org/10.1016/b978-0-08-051341-6.50005-6.

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Conference papers on the topic "Audio-oscillator"

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Ota, Reiji, Yuzuru Kato, and Yuichi Katori. "Hysteretic Oscillator-Based Reservoir Computing for Audio Waveform Pattern Recognition." In 2024 International Joint Conference on Neural Networks (IJCNN). IEEE, 2024. http://dx.doi.org/10.1109/ijcnn60899.2024.10651003.

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Hodes, T., J. Hauser, J. Wawrzynek, A. Freed, and D. Wessel. "A fixed-point recursive digital oscillator for additive synthesis of audio." In 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings. ICASSP99 (Cat. No.99CH36258). IEEE, 1999. http://dx.doi.org/10.1109/icassp.1999.759867.

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Garvi, Ruben, Javier Granizo, Angel Salvador, and Luis Hernandez. "A 55nm CMOS Linearized Oscillator for Audio VCO-ADCs achieving 78dBA of SNDR with $153\mu \mathrm{W}$." In 2022 29th IEEE International Conference on Electronics, Circuits and Systems (ICECS). IEEE, 2022. http://dx.doi.org/10.1109/icecs202256217.2022.9970891.

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Ye, Zhen, Wei Xue, Xu Tan, Qifeng Liu, and Yike Guo. "NAS-FM: Neural Architecture Search for Tunable and Interpretable Sound Synthesis Based on Frequency Modulation." In Thirty-Second International Joint Conference on Artificial Intelligence {IJCAI-23}. International Joint Conferences on Artificial Intelligence Organization, 2023. http://dx.doi.org/10.24963/ijcai.2023/651.

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Developing digital sound synthesizers is crucial to the music industry as it provides a low-cost way to produce high-quality sounds with rich timbres. Existing traditional synthesizers often require substantial expertise to determine the overall framework of a synthesizer and the parameters of submodules. Since expert knowledge is hard to acquire, it hinders the flexibility to quickly design and tune digital synthesizers for diverse sounds. In this paper, we propose ``NAS-FM'', which adopts neural architecture search (NAS) to build a differentiable frequency modulation (FM) synthesizer. Tunable synthesizers with interpretable controls can be developed automatically from sounds without any prior expert knowledge and manual operating costs. In detail, we train a supernet with a specifically designed search space, including predicting the envelopes of carriers and modulators with different frequency ratios. An evolutionary search algorithm with adaptive oscillator size is then developed to find the optimal relationship between oscillators and the frequency ratio of FM. Extensive experiments on recordings of different instrument sounds show that our algorithm can build a synthesizer fully automatically, achieving better results than handcrafted synthesizers. Audio samples are available at https://nas-fm.github.io/
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Peschke, Joshua, and Axel Berndt. "The Geometric Oscillator." In AM '17: Audio Mostly 2017. ACM, 2017. http://dx.doi.org/10.1145/3123514.3123522.

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Andresen, Uwe. "A Concept of a Wavetable Oscillator Based on a Neural Autoencoder." In AM '21: Audio Mostly 2021. ACM, 2021. http://dx.doi.org/10.1145/3478384.3478389.

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