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Artículos de revistas sobre el tema "Audio circuits"

Autor: Grafiati

Publicado: 25 de mayo de 2024

Última modificación: 31 de julio de 2025

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1

Aladdin Bayramov, Lala Bekirova, Aladdin Bayramov, Lala Bekirova. "MATHEMATICAL MODELING OF THE OPERATION OF AUDIO FREQUENCY (NO JUNCTION) AND JUNCTION RAIL CIRCUITS." PIRETC-Proceeding of The International Research Education & Training Centre 24, no. 03 (2023): 49–55. http://dx.doi.org/10.36962/piretc24032023-49.

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Rail circuits are the basic elements of modern railway automation and telemechanics systems, performing the functions of track sensors and telemechanical channels. It is shown that the calculation of their operating boundary conditions becomes more complicated with the application of junctionless audio frequency rail circuits. The analysis of track circuits consists of studying the changes in their operation in various modes when the circuit parameters are changed. During the analysis, the optimal values of the parameters of the circuit elements and the frequency of the power source are determ

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2

G.W.A.D. "Audio IC circuits manual." Microelectronics Reliability 29, no. 4 (1989): 644. http://dx.doi.org/10.1016/0026-2714(89)90356-9.

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3

V., I. Havryliuk, M. Voznyak O., and V. Meleshko V. "IMPROVING THE POSITIONING ACCURACY OF TRAIN ON THE APPROACH SECTION TO THE RAILWAY CROSSING." Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport, no. 1(61) (February 25, 2016): 9–18. https://doi.org/10.15802/stp2016/60936.

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<strong>Purpose. </strong>In the paper<strong> </strong>it is<strong> </strong>necessary to analyze possibility of improving the positioning accuracy of train on the approach section to crossing for traffic safety control at railway crossings. <strong>Methodology</strong>. Researches were performed using developed mathematical model, describing dependence of the input impedance of the coded and audio frequency track circuits on a train coordinate at various values of ballast isolation resistances and for all usable frequencies.<strong> Findings</strong>. The paper

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4

Falkowski, Piotr, and Andrzej Malcher. "Dynamically Programmable Analog Arrays in Acoustic Frequency Range Signal Processing." Metrology and Measurement Systems 18, no. 1 (2011): 77–90. http://dx.doi.org/10.2478/v10178-011-0008-1.

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Dynamically Programmable Analog Arrays in Acoustic Frequency Range Signal ProcessingField programmable analog arrays (FPAA), thanks to their flexibility and reconfigurability, give the designers quite new possibilities in analog circuit design. The number of both academic projects on FPAA and applications of commercially available programmable devices is still growing. This paper explores the properties and parameters of two most popular FPAA circuits: the AnadigmVortex AN221E04 and AnadigmApex AN231E04 from the Anadigm company. The research conducted by the authors led to the discovery of som

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5

Saiapina, Inna, Mykhailo Babaiev, and Olha Аnanіevа. "Reducing noise influence on an audio frequency track circuit." MATEC Web of Conferences 294 (2019): 03015. http://dx.doi.org/10.1051/matecconf/201929403015.

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In connection with electromagnetic interference influence on the track circuits, the purpose of the research is finding the means to increase the noise immunity of an audio frequency track circuit. The authors propose a new engineering solution, which enables reducing the effect of noises on the input of the track receiver in the intervals between signal current pulses. The proposed noise-immune audio frequency track circuit is based on inserting a delay line, an adjustable single-pulse generator and a controlled electronic switch into the existing audio frequency track circuit equipment. To a

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6

Saiapina, I., O. Gorobсhenko, V. Demchenko, and Y. Stompel. "SIMULATION AND INTELLECTUAL ANALYSIS OF AUDIO FREQUENCY TRACK CIRCUIT PARAMETERS." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", no. 39 (June 30, 2022): 167–74. http://dx.doi.org/10.32703/2617-9040-2022-39-16.

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To improve the method of increasing the noise immunity of a audio frequency track circuit, based on cutting out interference in the intervals between useful signal pulses, an analysis was made of fluctuations in the signal transit time in the transmission path of a audio frequency track circuit depending on its operation parameters: signal current frequency, rail line length, insulation resistance and ambient temperature. For this, a simulation model of the operation of a audio frequency track circle has been developed. Based on the simulation results, a relational database was created with th

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7

Knight-Percival, Alexander, Christopher Johnson, Benjamin Richards, Scott Palmer, and Nicholas Bowring. "Mapping of the electromagnetic environment on the railway: Condition monitoring of signalling assets." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 234, no. 3 (2018): 246–56. http://dx.doi.org/10.1177/0954409718802998.

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Conventional track circuit condition monitoring systems are fixed at the wayside, with each installation reporting on a single track circuit. In this work, we present a custom-built, sensitive, magnetic field detection system, which can be fitted to the underside of a rail vehicle. With this system installed, some characteristics of an operating track circuit can be monitored from the vehicle whilst it is in motion. By using appropriate analysis techniques, it is possible to identify the signatures of equipment relating to audio frequency track circuits, the topic of this work. Analysing the s

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8

Blessed Olalekan, Oyebola. "Sallen-Key Topology, MFB and Butterworthy in Bandpass Design for Audio Circuit Design." Asian Journal of Electrical Sciences 6, no. 1 (2017): 23–28. http://dx.doi.org/10.51983/ajes-2017.6.1.1992.

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This paper succinctly studied active filter topologies: Sallen-key circuit, MFB and Butterworth in band pass design for audio circuits. It has been able to identify distinctive suitable features with applications in audio frequencies range. The work also serves as a foundational study for an advanced work on active audio filters. Sallen-Key pluses with quality factor (Q) that can be varied via the inner gain (G) without modifying the mid frequency (fm). Notably, the Q and Am cannot be adjusted independently. Butterworth, maximally flat magnitude response in the pass band, has monotonic amplitu

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9

Ogunseye, Abiodun, and Olamide Omolara Olusanya. "Design and Simulation of a Microcontroller Based Loudspeaker Protection System Against Amplifier Direct Current (D.C) Offsets." Journal of Communications Technology, Electronics and Computer Science 8 (November 3, 2016): 12. http://dx.doi.org/10.22385/jctecs.v8i0.122.

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A number of failure mechanisms can result in the damage of loudspeakers that are directly connected to an audio power amplifier system. One of such failure modes occurs when the amplifier circuit develops an output d.c voltage, in which case, the loudspeaker coil will be damaged by overheating. D.c offset detection circuits, usually based on simple transistor circuits are normally used to protect the loudspeaker against this failure mode. However, as effective as they are, these circuits can fail in ways that can result in loudspeaker damage. In this work, a microcontroller based circuit that

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10

Hashemifar, Seyed Mohammad. "Design of a Single-Core Digital-to-Analog Converter with Ultra-Wideband and Low Power Consumption for CUWB-IR Applications." Tehnički glasnik 16, no. 3 (2022): 311–14. http://dx.doi.org/10.31803/tg-20220405104325.

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Data converters are intermediate circuits used to connect between two analog and digital ranges. Data converters are not only used for converting audio into a microphone or speaker, but also for converting audio into a camera or display, transferring information to a computer or digital signal processor. At these times, the need for data converters is not invested in every aspect of life. Digital to analog converters is a leading part of these converters, which are widely used in most audio and video circuits. In this thesis, we have proposed a 4-bit 1GS/s DAC for CUWB-IR usage. To enhance the

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11

Sun, Jiawei. "Different Structures of Audio Power Amplifiers." Highlights in Science, Engineering and Technology 111 (August 19, 2024): 1–6. http://dx.doi.org/10.54097/17szgx18.

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In recent years, the world's technological advancements have been continuously improving, with semiconductor technology developing rapidly. As a result, power amplifier circuits have also seen rapid development and widespread application. There are various types of power amplifier circuits, among which the one specifically designed for amplifying audio is the audio power amplifier. Serving as an electronic amplifier, the audio power amplifier can amplify low-power electronic audio signals to levels capable of driving devices, making its presence noticeable in many audio systems. Understanding

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12

Journal, IJSREM. "Underwater Audio and Data Transmission System using Li-Fi Technology." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 03 (2024): 1–11. http://dx.doi.org/10.55041/ijsrem29208.

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Underwater communication system utilizing Li-Fi (Light Fidelity) technology for transmitting audio and data. The system addresses limitations of traditional methods by leveraging an Arduino Uno microcontroller for control, lasers for data transmission, and solar panels for reception. To enhance received audio signals, an amplifier circuit is employed before feeding them into a speaker for playback. Data is recovered and processed on the receiving end using the Arduino Uno. This research explores the feasibility of Li-Fi for underwater applications. The paper details the design and development

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13

Giampiccolo, Riccardo, Stefano Ravasi, and Alberto Bernardini. "Automatic Generation of Virtual Analog Audio Plug-ins based on Wave Digital Filters." Journal of the Audio Engineering Society 73, no. 6 (2025): 376–87. https://doi.org/10.17743/jaes.2022.0208.

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Analog audio effects can be realized as digital audio effects according to the formalism of virtual analog modeling. Among white box techniques, wave digital filters (WDFs) have lately shown to be instrumental for digitizing complex nonlinear analog circuits because they are characterized by interesting properties that allow for efficient implementations. However, building audio plug-ins requires manually designing WDFs and graphical user interfaces, tasks that are time consuming, thus hindering rapid prototyping. In this paper, the authors propose VIOLA, a framework for the automatic generati

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14

Murtianta, Budihardja, and Erlina Sari. "Penguat Jembatan dengan Untai Pembalik Fase." Elektrika 14, no. 2 (2022): 58. http://dx.doi.org/10.26623/elektrika.v14i2.5329.

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The maximum output voltage of the audio amplifier is limited to the magnitude of the power supply voltage of the power transistor or the operational amplifier on the final amplifier. This limits the maximum power of the audio amplifier output. The way to enlarge the output power of the audio amplifier without increasing the voltage is the bridge method or bridged modes. With this method a bridge amplifier will be generated. This Bridge Amplifier is also known as Bridge-Tied Load (BTL) or Bridged Transformerless. The principle of Bridge Amplifiers is to use a pair of final amplifiers whose outp

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15

Ortuño-Molina, Santiago, Francisco M. Muñoz-Pérez, Adrián Garmendía-Martínez, Juan C. Castro-Palacio, and Juan A. Monsoriu. "Measuring the Q-factor of a series RLC circuit with a smartphone as a function generator." Physics Education 59, no. 6 (2024): 065023. http://dx.doi.org/10.1088/1361-6552/ad81c6.

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Abstract The use of smartphones as tools for teaching circuits has revolutionized the educational practice in this field. Free applications allow to measure the acoustic intensity with a smartphone and to generate an acoustic signal with a specific frequency. In this way, students turn their mobile devices into function generators and oscilloscopes, respectively, through the audio port. This innovation facilitates the implementation of hands-on experiments with basic circuits. This work implements a smartphone as a function generator connected to a series RLC circuit to obtain the average diss

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16

Shestakov, M. I. "Calculation of tonal rail circuits with consideration of a complicated waveform." Herald of the Ural State University of Railway Transport, no. 1 (2021): 104–12. http://dx.doi.org/10.20291/2079-0392-2021-1-104-112.

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The article deals with the problem of calculating modern audio frequency track circuits, the working signal of which is a frequency-manipulated signal transmitting Bauer codes. Such signals have a wide spectrum, which leads to the error in the calculations performed according to the classical method for a single frequency. Increasing the code transfer rate in order to reduce the response time of track circuits further expands the signal spectrum, which negatively affects the safety of such rail circuits. To determine the width and composition of the signal spectrum, a discrete Fourier transfor

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17

Giampiccolo, Riccardo, Alberto Bernardini, Giambattista Gruosso, Paolo Maffezzoni, and Augusto Sarti. "Multiphysics Modeling of Audio Circuits With Nonlinear Transformers." Journal of the Audio Engineering Society 69, no. 6 (2021): 374–88. http://dx.doi.org/10.17743/jaes.2021.0008.

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18

Saiapina, I. "DATA CLASSIFICATION METHOD AND NEURAL NETWORKS APPLICATION FOR INCREASING NOISE IMMUNITY OF AUDIO FRUQENCY TRACK CURCUIT." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", no. 39 (June 30, 2022): 269–77. http://dx.doi.org/10.32703/2617-9040-2022-39-26.

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The article proposes the optimization of the existing device for improving the noise immunity of audio frequency track circuits. Due to the fact that the signal current in the audio frequency track circuit is a tone frequency signal modulated by pulses, by opening the transmission path of the audio frequency track circuit at the input of the track receiver during the intervals between signal current pulses, the track receiver can be protected from interference. To take into account the delay time for the signal to pass from the output of the track generator to the input of the track receiver,

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19

Chen, Ruei Chang, and Shih Fong Lee. "Design and Layout of a High-Performance PWM Control Class D Amplifiers IC Systems." Applied Mechanics and Materials 203 (October 2012): 469–73. http://dx.doi.org/10.4028/www.scientific.net/amm.203.469.

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This paper presents the design and implementation of a novel pulse width modulation control class D amplifiers chip. With high-performance, low-voltage, low-power and small area, these circuits are employed in portable electronic systems, such as the low-power circuits, wireless communication and high-frequency circuit systems. This class D chip followed the chip implementation center advanced design flow, and then was fabricated using Taiwan Semiconductor Manufacture Company 0.35-μm 2P4M mixed-signal CMOS process. The chip supply voltage is 3.3 V which can operate at a maximum frequency of 10

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20

SEMENOV, Andriy, Maksym ANDREIENKOV, Anton KHLOBA, Mykhailo SHURKHAL, and Vladyslav OLKHOVYCH. "DEVELOPMENT OF A 150 W LINEAR LABORATORY POWER SUPPLY UNIT." MEASURING AND COMPUTING DEVICES IN TECHNOLOGICAL PROCESSES, no. 1 (March 28, 2024): 166–75. http://dx.doi.org/10.31891/2219-9365-2024-77-21.

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The laboratory power supply is an indispensable device for the manufacture, testing, adjustment and repair of electronic equipment. The object of research is the process of selecting and justifying the device circuit on a modern element base, developing a printed circuit board, manufacturing and testing the created device layout in practice. The toroidal transformer of the required power was also calculated. The test was carried out in the voltage and current stabilization mode, and the data obtained indicate the possibility of further improvement of the device's circuitry. To build a laborato

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21

Pop, Anda Olimpia, and Ignác Csaba Filip. "The Connection Between a Professional Singer’s Intonation and the Coordination of the Cybernetic Circuits of the Ear." Studia Universitatis Babeş-Bolyai Musica 67, no. 2 (2022): 127–41. http://dx.doi.org/10.24193/subbmusica.2022.spiss2.09.

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"This article is addressed to pedagogues, students, and professional singers and draws attention to the tight connection between the functionality of the larynx and the cybernetic circuits of the ear. During the training periods of a singer, and then throughout one’s career, we deal with sound intonation flaws very many times. These are due not only to a flawed vocal technique or amusia , but also to flaws of audio-vocal feedback circuits many times. If they are discovered and corrected, the voice can be completely regained. It is very important to be aware of the difference between hearing an

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22

Zhao, Sihan. "Design and implementation of a preset operational amplifier based on basic digital and analog hybrid circuit." Applied and Computational Engineering 38, no. 1 (2024): 112–20. http://dx.doi.org/10.54254/2755-2721/38/20230539.

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In the vast landscape of electronic engineering, the indispensable roles of both analog and digital circuits are unequivocally recognized. Analog circuits, with their foundational principles, are extensively harnessed in areas encompassing audio, video, power systems, and particularly, amplifiers. Conversely, digital circuits, integral to modern-day technological advancements, are dominantly present in computing platforms, telecommunication systems, control mechanisms, and data storage infrastructures. Amplifiers, a cornerstone in analog circuit designs, principally focus on magnifying the amp

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23

Sisin, Valeriy Alexandrovich, and Maxim Igorevich Shestakov. "Comparative analysis of modern jointless audio frequency track circuits." Transport of the Urals, no. 3 (2019): 59–63. http://dx.doi.org/10.20291/1815-9400-2019-3-59-63.

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24

Kost, Michael A. "Systems and methods for protection of audio amplifier circuits." Journal of the Acoustical Society of America 128, no. 4 (2010): 2252. http://dx.doi.org/10.1121/1.3500759.

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25

Toni, Toni, Muh Wildan, Sabdo Purnomo, Eriyandi Eriyandi, and Ika Endrawijaya. "Workshop Perakitan Audio Amplifier Guna Meningkatkan Keterampilan Bidang Elektronika Werga Desa Serdang Kulon, Kec. Panongan, Kab. Tangerang." Pengmasku 3, no. 1 (2023): 16–25. http://dx.doi.org/10.54957/pengmasku.v3i1.327.

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Changes and developments in the times of society are required to be able to keep abreast of technological advances. The development in the field of electronics technology certainly requires human resources who have competence in accordance with the needs of society and industry., the results of observations carried out on the Serdang Kulon village, there are still many community members who do not understand the field of electronics so it is very necessary to carry out community service activities the community in that location. In this community service activity, several things were carried o

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26

Paiva, Rafael C. D., Stefano D'Angelo, Jyri Pakarinen, and Vesa Valimaki. "Emulation of Operational Amplifiers and Diodes in Audio Distortion Circuits." IEEE Transactions on Circuits and Systems II: Express Briefs 59, no. 10 (2012): 688–92. http://dx.doi.org/10.1109/tcsii.2012.2213358.

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27

Yeh, David T., Jonathan S. Abel, and Julius O. Smith. "Automated Physical Modeling of Nonlinear Audio Circuits For Real-Time Audio Effects—Part I: Theoretical Development." IEEE Transactions on Audio, Speech, and Language Processing 18, no. 4 (2010): 728–37. http://dx.doi.org/10.1109/tasl.2009.2033978.

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28

Mistry, Keyur, Sudeshna Dash, and Siddharth Tallur. "Audio encryption through synchronization of chaotic oscillator circuits: Teaching non-linear dynamics through simple electrical circuits." American Journal of Physics 87, no. 12 (2019): 1004–13. http://dx.doi.org/10.1119/10.0000024.

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29

Li, Haoxiang. "Comparison and performance optimization of two absolute circuit designs based on Multisim." Applied and Computational Engineering 129, no. 1 (2025): 63–70. https://doi.org/10.54254/2755-2721/2025.20234.

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Digital circuits are crucial in today's technology, underpinning infrastructure such as computing, communicating, and intelligent devices. Its high efficiency, accuracy and programmable capability drive the development of information processing, data transmission and automation systems. The application of digital circuits has promoted innovation in artificial intelligence, the Internet of Things and other fields, providing strong support for the intelligence and interconnection of modern society. The absolute value circuit is discussed in this paper. The absolute value circuit is implemented f

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30

Phillips, Reid H., Rahil Jain, Yoni Browning, et al. "Flow control using audio tones in resonant microfluidic networks: towards cell-phone controlled lab-on-a-chip devices." Lab on a Chip 16, no. 17 (2016): 3260–67. http://dx.doi.org/10.1039/c6lc00738d.

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Microfluidic networks can be designed using fluidic analogies to electrical resistors, inductors, and capacitors and combining them to create resonant circuits. Multi-channel microfluidic networks show selective excitation that can be used to create pumps controlled by audio tones.

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31

Eddine, Khamlich Salah, Khamlich Fathallah, Issam Atouf, and Benrabh Mohamed. "Parallel Implementation of Nios Ii Multiprocessors, Cepstral Coefficients of Mel Frequency and MLP Architecture in Fpga: the Application of Speech Recognition." WSEAS TRANSACTIONS ON SIGNAL PROCESSING 16 (January 13, 2021): 146–54. http://dx.doi.org/10.37394/232014.2020.16.16.

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Speech processing in real time requires the use of fast, reconfigurable electronic circuits capable of handling large amounts of information generated by the audio source. This article presents hardware implementations of a multilayer perceptron (MLP) and the MFCC algorithm for speech recognition. These algorithms have been implemented in hardware and tested in an on-board electronic card based on a reconfigurable circuit (FPGA). We also present a comparative study between several architectures of MLP and with the literature on the level of costs with regard to the surface of silicon, the spee

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32

Chaichana, Amornchai, Wasakorn Traiphat, Surapong Siripongdee, Patcharin Intamas, and Winai Jaikla. "Design of a compact multifunction biquad filter with five filtering responses and its modification as a sinusoidal oscillator." Journal of Physics: Conference Series 3022, no. 1 (2025): 012012. https://doi.org/10.1088/1742-6596/3022/1/012012.

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Abstract This paper presents a systematic methodology for designing a voltage-mode multifunction biquad filter employing the commercially available active element, LT1228. The proposed topology adopts a three-input single-output (TISO) configuration. The circuit comprises a single LT1228, two capacitors, and three resistors, offering a highly compact design. The TISO biquad filter is capable of providing five fundamental filtering responses: low-pass (LP), band-pass (BP), high-pass (HP), band-reject (BR), and all-pass (AP) responses, within the same circuit architecture. Notably, these respons

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33

Wright, Alec, Eero-Pekka Damskägg, Lauri Juvela, and Vesa Välimäki. "Real-Time Guitar Amplifier Emulation with Deep Learning." Applied Sciences 10, no. 3 (2020): 766. http://dx.doi.org/10.3390/app10030766.

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This article investigates the use of deep neural networks for black-box modelling of audio distortion circuits, such as guitar amplifiers and distortion pedals. Both a feedforward network, based on the WaveNet model, and a recurrent neural network model are compared. To determine a suitable hyperparameter configuration for the WaveNet, models of three popular audio distortion pedals were created: the Ibanez Tube Screamer, the Boss DS-1, and the Electro-Harmonix Big Muff Pi. It is also shown that three minutes of audio data is sufficient for training the neural network models. Real-time impleme

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Falaize, Antoine, and Thomas Hélie. "Passive Guaranteed Simulation of Analog Audio Circuits: A Port-Hamiltonian Approach." Applied Sciences 6, no. 10 (2016): 273. http://dx.doi.org/10.3390/app6100273.

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35

Giampiccolo, Riccardo, Antonino Natoli, Alberto Bernardini, and Augusto Sarti. "Parallel Wave Digital Filter Implementations of Audio Circuits with Multiple Nonlinearities." Journal of the Audio Engineering Society 70, no. 6 (2022): 469–84. http://dx.doi.org/10.17743/jaes.2022.0012.

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36

Giampiccolo, Riccardo, Mauro Giuseppe de Bari, Alberto Bernardini, and Augusto Sarti. "Wave Digital Modeling and Implementation of Nonlinear Audio Circuits With Nullors." IEEE/ACM Transactions on Audio, Speech, and Language Processing 29 (2021): 3267–79. http://dx.doi.org/10.1109/taslp.2021.3120627.

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37

Najnudel, Judy, Thomas Héle, David Roze, and Rémy Müller. "Power-Balanced Modeling of Nonlinear Coils and Transformers for Audio Circuits." Journal of the Audio Engineering Society 69, no. 7/8 (2021): 506–16. http://dx.doi.org/10.17743/jaes.2021.0022.

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38

Liu, Pu. "Audio bass management methods and circuits and systems using the same." Journal of the Acoustical Society of America 112, no. 4 (2002): 1236. http://dx.doi.org/10.1121/1.1520927.

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39

Chiappano, Giovanni, Armando Colamonico, Marcello Donati, Franco Maloberti, Federico Montecchi, and Giuseppe Palmisano. "Custom integrated circuits for audio processing and signalling in vehicular units." European Transactions on Telecommunications 1, no. 6 (1990): 603–10. http://dx.doi.org/10.1002/ett.4460010603.

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40

Bellili, Nour El Imane, and Khaled Bekhouche. "A simple architecture for high performance class-D audio amplifier with novel RC network as negative feedback loop." Indonesian Journal of Electrical Engineering and Computer Science 26, no. 2 (2022): 707. http://dx.doi.org/10.11591/ijeecs.v26.i2.pp707-713.

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<span>In this work, we have designed and simulated a proposed architecture and good performances single-ended class-D audio amplifier (CDA). The proposed circuit is build using pulse-width modulation (PWM). We have proposed a novel RC network as negative feedback loop attached to a second-order integrator to get free of high-frequency carrier ripples and to reach improved output accuracy, thus improved performance and efficiency. This proposed negative feedback loop extremely reduces total harmonic distortion plus noise (THD+N). We have used a passive second-order butterworth output filt

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41

Bellili, Nour El Imane, and Khaled Bekhouche. "A simple architecture for high performance class-D audio amplifier with novel RC network as negative feedback loop." Indonesian Journal of Electrical Engineering and Computer Science 26, no. 2 (2022): 707–13. https://doi.org/10.11591/ijeecs.v26.i2.pp707-713.

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In this work, we have designed and simulated a proposed architecture and good performances single-ended class-D audio amplifier (CDA). The proposed circuit is build using pulse-width modulation (PWM). We have proposed a novel RC network as negative feedback loop attached to a second-order integrator to get free of high-frequency carrier ripples and to reach improved output accuracy, thus improved performance and efficiency. This proposed negative feedback loop extremely reduces total harmonic distortion plus noise (THD+N). We have used a passive second-order butterworth output filter. This cir

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42

Faiza, Delsina, Thamrin Thamrin, and Ahmaddul Hadi. "PENGARUH PENGGUNAAN ELECTRONIC COMPONENT TESTER SEBAGAI MEDIA PEMBELAJARAN TERHADAP HASIL BELAJAR SISWA PROGRAM KEAHLIAN TEKNIK AUDIO VIDEO SMKN 1 SUMBAR." Jurnal Teknologi Informasi dan Pendidikan 10, no. 3 (2017): 73–86. http://dx.doi.org/10.24036/tip.v10i3.22.

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This study aims to determine the effect of the use of Electronic Component Tester as instructional media to the students' learning outcomes in Audio Video Techniques Program SMK N 1 Sumbar on basic competence classify passive and active components in electrical and electronic circuit. The research method used in this research, especially in the design of Electronic Component Tester is Research and Development (R & D) research, which consists of media design, validation, revision, product manufacture, and testing. After the learning media is validated, experimental research will be conducte

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43

Bilgehan, Bülent, Buğçe Eminağa, and Mustafa Riza. "New Solution Method for Electrical Systems Represented by Ordinary Differential Equation." Journal of Circuits, Systems and Computers 25, no. 02 (2015): 1650011. http://dx.doi.org/10.1142/s0218126616500110.

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Electrical circuits based on linear and nonlinear modelling principles have difficulties to meet demands caused by a large amount of data generated and processed. The aim is to examine the existing models from bigeometric calculus point of view to obtain accuracy on the results. This work is an application of bigeometric Runge–Kutta (BRK4) method aiming to solve differential equations with nonzero initial condition. This type of work arises from applications where the systems are defined by ordinary differential equations such as noise, filter, audio, chaotic circuits, etc. Solutions to these

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44

Liu, Bin, and Yan Ren. "A design of laser array harp based on multi-dimensional wavelet transform and audio signal reconstruction." Journal of Physics: Conference Series 2113, no. 1 (2021): 012059. http://dx.doi.org/10.1088/1742-6596/2113/1/012059.

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Abstract This paper introduces a design scheme of laser array harp based on multi-dimensional wavelet transform and audio signal reconstruction. The green light beams from multiple high-power lasers simulate harp strings, use photoresistors as the signal receiving end, and use a signal conditioning system composed of analog circuits and LM393 comparators to collect and adjust the resistance signal of the laser sensor[1], and finally it is adjusted to a level signal that can be recognized by the CPU. After receiving the signal, the CPU core board analyzes the string signal, and sends control co

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45

Cheng-Ta Chiang, Chih-Hsien Wang, and Chia-Yu Wu. "A CMOS MEMS Audio Transducer Implemented by Silicon Condenser Microphone With Analog Front-End Circuits of Audio Codec." IEEE Transactions on Very Large Scale Integration (VLSI) Systems 20, no. 9 (2012): 1656–67. http://dx.doi.org/10.1109/tvlsi.2011.2160746.

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46

Sanfilippo, Dario, and Andrea Valle. "Feedback Systems: An Analytical Framework." Computer Music Journal 37, no. 2 (2013): 12–27. http://dx.doi.org/10.1162/comj_a_00176.

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The use of feedback-based systems in the music domain dates back to the 1960s. Their applications span from music composition and sound organization to audio synthesis and processing, as the interest in feedback resulted both from theoretical reflection on cybernetics and system theory, and from practical experimentation on analog circuits. The advent of computers has made possible the implementation of complex theoretical systems in audio-domain oriented applications, in some sense bridging the gap between theory and practice in the analog domain, and further increasing the range of audio and

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47

Fujimoto, Takuya, Shogo Kawahara, Yukio Fuchigami, et al. "Portable Electrochemical Sensing System Attached to Smartphones and Its Incorporation with Paper-based Electrochemical Glucose Sensor." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 3 (2017): 1423. http://dx.doi.org/10.11591/ijece.v7i3.pp1423-1429.

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This paper described the development of a small and low cost biosensor consisting of a smartphone-based electrochemical biosensor device and a paper-based biosensor. The device harvested power from the smartphone and transferred data through audio jack. We designed CMOS circuits including a power supply circuit, a potentiostat, and a ΔΣ modulator. The fabrication of a paper-based biosensor was simple: the three electrodes were directly drawn on chromatography paper using a carbon pencil. The paper-based biosensor was low cost, disposable, portable and friendly to the environment. The sensing s

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48

PEARSICĂ, Marian, and Laurian GHERMAN. "WIRELESS TRANSMITTER FOR OPTICAL COMMUNICATION WITH FREQUENCY-MODULATED LASER CARRIER." Review of the Air Force Academy 21, no. 2 (2024): 53–59. http://dx.doi.org/10.19062/1842-9238.2023.21.2.7.

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Interest in the use of unguided optical systems is growing, due to the development of wireless mobile and indoor communication systems as well as the applications of lasers in space technology. The proposed laser transmitter, with frequency-modulated carrier, represents the optical transmitter of a wireless optical communication system, for transmitting audio signals on laser carriers, which can be used both inside buildings and outside, for distances estimated according to system parameters. In the paper are presented elements of design of the electrical diagram of principle, as well as analy

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Frayne, P. G. "Experimental modelling of high frequency circuits at low audio frequencies part I." International Journal of Infrared and Millimeter Waves 13, no. 5 (1992): 713–20. http://dx.doi.org/10.1007/bf01010693.

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50

Yeh, D. T. "Automated Physical Modeling of Nonlinear Audio Circuits for Real-Time Audio Effects—Part II: BJT and Vacuum Tube Examples." IEEE Transactions on Audio, Speech, and Language Processing 20, no. 4 (2012): 1207–16. http://dx.doi.org/10.1109/tasl.2011.2173677.

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