Delta modulation

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Delta modulation (DM or Δ-modulation)is an analog-to-digital and digital-to-analog signal conversion technique used for transmission of voice information where quality is not of primary importance. DM is the simplest form of differential pulse-code modulation where the difference between successive samples is encoded into n-bit data streams. (Wikipedia.org)






Conferences related to Delta modulation

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2013 9th International Conference on Information, Communications & Signal Processing (ICICS)

The conference provides an opportunity for researchers around the world to exchange ideas and latest research results in areas such as multimedia systems, information systems, signal processing, communications, networking and related fields.


2009 Brazilian Power Electronics Conference (COBEP 2009)

The main objective of COBEP, The Brazilian Power Electronics Conference, is to promote a forum of discussion about research and development, applications and recent advances and trends in the field of power electronics and electrical machines drives and control.


2008 IEEE Power Electronics Specialists Conference - PESC 2008

  • 2007 IEEE Power Electronics Specialists Conference - PESC 2007


2006 IEEE Workshop on Microelectronics and Electron Devices (WMED)



Periodicals related to Delta modulation

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Consumer Electronics, IEEE Transactions on

The design and manufacture of consumer electronics products, components, and related activities, particularly those used for entertainment, leisure, and educational purposes


Display Technology, Journal of

This publication covers the theory, design, fabrication, manufacturing and application of information displays and aspects of display technology that emphasize the progress in device engineering, device design, materials, electronics, physics and reliabilityaspects of displays and the application of displays.


Electron Devices, IEEE Transactions on

Publishes original and significant contributions relating to the theory, design, performance and reliability of electron devices, including optoelectronics devices, nanoscale devices, solid-state devices, integrated electronic devices, energy sources, power devices, displays, sensors, electro-mechanical devices, quantum devices and electron tubes.


Industrial Electronics, IEEE Transactions on

Theory and applications of industrial electronics and control instrumentation science and engineering, including microprocessor control systems, high-power controls, process control, programmable controllers, numerical and program control systems, flow meters, and identification systems.


Industry Applications, IEEE Transactions on

The development and application of electric systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; the encouragement of energy conservation; the creation of voluntary engineering standards and recommended practices.



Most published Xplore authors for Delta modulation

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Xplore Articles related to Delta modulation

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Antialiasing filter for NSDM codec

Juliusz Godek; Ryszard Golanski; Jacek Kolodziej 2008 International Conference on Signals and Electronic Systems, 2008

A consideration for an analog antialiasing filter performance, addressed to a nonuniform sampling coding technique was described. The filer prototype design and its implementations are presented. The Sallen-Key architecture based on CMOS inverters and the solution of achieving resistor formed by transmission gates with long MOSFETs are presented. Finally the simulation results are discussed.


Optimal discrete pulse modulation waveforms for resonant link inverters

M. H. Kheraluwala; D. M. Divan Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE, 1988

The advent of zero-voltage-switching resonant link inverters has raised the question of modulation strategies that satisfy the regular sampling constraints of such systems. An easy and elegant approach to the synthesis of optimal discrete pulse modulation waveforms is presented. Utilizing the finiteness of the set of possible waveforms, an exhaustive search algorithm is deployed to derive a set of optimum ...


Low-frequency leakage current reduction using active control of single-phase PWM rectifier

Dong Dong; Dushan Boroyevich; Paolo Mattavelli 2011 IEEE Energy Conversion Congress and Exposition, 2011

The leakage current in grid-interfaced converter systems presents a considerable issue in regards to safety and efficiency. In addition to the high-frequency leakage current caused by the PWM switching schemes, low- frequency leakage current limits the value of dc-side common-mode (CM) capacitors, thereby leading to the bulky dc passive filters for many distributed generation (DG) system applications. In order to ...


A 14-bit delta-sigma modulator for ADSL-CO applications in 0.18 µm CMOS

R. Gaggl; A. Wiesbauer; C. Schranz; P. Pessl Proceedings of the 28th European Solid-State Circuits Conference, 2002

A high-resolution multi-bit Sigma-Delta ADC implemented in a 0.18µm CMOS technology is introduced. Active blocks are composed of regular threshold voltage devices only. The circuit is targeted for an ADSL Central - Office (CO) application [3]. An area- and power-efficient realization of a 2nd -order, single-loop, 3-bit modulator with high oversampling ratio (OSR=96) is presented. The ΣΔ - modulator features ...


A Delta Modulation Filter for Speech-Type Signals

D. Prezas; J. LoCicero IEEE Transactions on Communications, 1980

This paper considers the realization of an all-digital system for direct filtering of a delta modulation (DM) encoded signal. We have shown [1] that this system can be realized fairly easily for any type of filter function when the signals are encoded with a linear DM. We now address the problem of digitally filtering an adaptive DM (ADM) encoded signal. ...


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Educational Resources on Delta modulation

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eLearning

Antialiasing filter for NSDM codec

Juliusz Godek; Ryszard Golanski; Jacek Kolodziej 2008 International Conference on Signals and Electronic Systems, 2008

A consideration for an analog antialiasing filter performance, addressed to a nonuniform sampling coding technique was described. The filer prototype design and its implementations are presented. The Sallen-Key architecture based on CMOS inverters and the solution of achieving resistor formed by transmission gates with long MOSFETs are presented. Finally the simulation results are discussed.


Optimal discrete pulse modulation waveforms for resonant link inverters

M. H. Kheraluwala; D. M. Divan Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE, 1988

The advent of zero-voltage-switching resonant link inverters has raised the question of modulation strategies that satisfy the regular sampling constraints of such systems. An easy and elegant approach to the synthesis of optimal discrete pulse modulation waveforms is presented. Utilizing the finiteness of the set of possible waveforms, an exhaustive search algorithm is deployed to derive a set of optimum ...


Low-frequency leakage current reduction using active control of single-phase PWM rectifier

Dong Dong; Dushan Boroyevich; Paolo Mattavelli 2011 IEEE Energy Conversion Congress and Exposition, 2011

The leakage current in grid-interfaced converter systems presents a considerable issue in regards to safety and efficiency. In addition to the high-frequency leakage current caused by the PWM switching schemes, low- frequency leakage current limits the value of dc-side common-mode (CM) capacitors, thereby leading to the bulky dc passive filters for many distributed generation (DG) system applications. In order to ...


A 14-bit delta-sigma modulator for ADSL-CO applications in 0.18 µm CMOS

R. Gaggl; A. Wiesbauer; C. Schranz; P. Pessl Proceedings of the 28th European Solid-State Circuits Conference, 2002

A high-resolution multi-bit Sigma-Delta ADC implemented in a 0.18µm CMOS technology is introduced. Active blocks are composed of regular threshold voltage devices only. The circuit is targeted for an ADSL Central - Office (CO) application [3]. An area- and power-efficient realization of a 2nd -order, single-loop, 3-bit modulator with high oversampling ratio (OSR=96) is presented. The ΣΔ - modulator features ...


A Delta Modulation Filter for Speech-Type Signals

D. Prezas; J. LoCicero IEEE Transactions on Communications, 1980

This paper considers the realization of an all-digital system for direct filtering of a delta modulation (DM) encoded signal. We have shown [1] that this system can be realized fairly easily for any type of filter function when the signals are encoded with a linear DM. We now address the problem of digitally filtering an adaptive DM (ADM) encoded signal. ...


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IEEE-USA E-Books

  • A Novel Architecture Design for VLSI Implementation of an FIR Decimation Filter

    A novel architecture design of a one stage FIR filter for decimation is described. It performs the decimation of a 1-bit code at 1024KHz of double integration Sigma Delta modulation output to PCM at 16KHz. This architecture is designed in such a way that it needs only a simple control structure suitable for VLSI implementation. We devised an algorithm for generating the coefficients of the filter with a minimum of required hardware. It does not require storing the coefficients in a ROM and continuously reading it to calculate the convolution. The accumulators needed to perform the direct convolution are arranged in a way that simplifies and minimizes the hardware required for the filter implementation. The filter response is Sinc3(f) which provides sufficient attenuation for modulation generated by means of double integration. The implementation of this filter requires the generation of the coefficients and the performance of the convolution. Three coefficients are needed with every input to obtain the output sequence. The major feature of this architecture is the use of an efficient algorithm to obtain the coefficients thereby reducing the area and power consumption. It is very suitable for VLSI implementation in CMOS technology.

  • The Structure of Quantization Noise from SigmaDelta Modulation

    When the sampling rate of a sigma-delta modulator far exceeds the frequencies of the input signal. its modulation noise is highly correlated with the amplitude of the input. We derive simple algebraic expressions for this noise and its spectrum in terms of the input amplitude. The results agree with measurements taken on a breadboard circuit. This work can be useful for designing oversarnpled analog to digital converters that use sigma-delta modulation for the primary conversion.

  • Multistage SigmaDelta Modulation

    We provide a theoretical basis for multistage sigma-delta modulation (MSM), which is a cascade realization of several single-loop sigma-delta modulators with a linear combinatorial network. Equations are derived describing the output and the quantization noise of MSM for an arbitrary input signal and the noise shaping characteristic of MSM is investigated. The spectral characteristics of an _m_-stage sigma-delta modulator with both dc and sinusoidal inputs are developed. For both types of inputs the binary quantizer noise of the _m_th (_m_ ¿ 3) sigma-delta quantizer, which appears at the output as an _m_th order difference, is asymptotically white, uniformly distributed, and uncorrelated with the input level. It is also found that for an _m_-stage sigma-delta quantizer with either an ideal low-pass filter or a sinc _m_ + 1 filter decoder, the average quantization noise of the system is inversely proportional to the (2_m_, + 1)th power of the oversampling ratio _R_. This implies that high-order systems are favorable in terms of the trade- off between the quantization noise and the oversampling ratio. Simulation results are presented to support the theoretical analysis.

  • Oversampled SigmaDelta Modulation

    Oversampled sigma-delta modulation has been proposed as a practical implementation for high rate analog-to-digital conversion because of its simplicity and its robustness against circuit imperfections. To date, mathematical developments of the basic properties of such systems have been based either on simplified continuous-time approximate models or on linearized discrete-time models where the quantizer is replaced by an additive white uniform noise source. In this paper. we rigorously derive several basic properties of a simple discrete-time single integrator loop sigma-delta modulator with an accumulate-and-dump demodulator. The derivation does not require any assumptions on the correlation or distribution of the quantizer error, and hence involves no linearization of the nonlinear system, but it does show that when the input is constant, the state sequence of the integrator in the encoder loop can be modeled exactly as a linear system in an appropriate space. Two basic properties are developed: 1) the behavior of the sigma-delta quantizer when driven by a constant input and its relation to uniform quantization, and 2) the rate-distortion tradeoffs between the oversampling ratio and the average mean-squared quantization error.

  • Fully Controlled Three-Phase Bridge Converters

    This chapter discusses the operation of a three‐phase fully controlled bridge converter. It is shown that by suitable control, this device can be used to achieve either a three‐phase controllable voltage source or a three‐phase controllable current source. The chapter presents a refinement of six‐step operation. In particular, one of several pulse‐width modulation (PWM) control strategies that allows the amplitude of the fundamental component of the voltage to be readily controlled is discussed. Six‐step modulation, extended sine‐triangle modulation, and space‐vector modulation are all voltage‐source modulation schemes. The chapter explains usage of these schemes to develop an open‐loop voltage‐regulated converter. Hysteresis modulation and delta modulation are both current source‐based schemes. These are used as the basis of developing an open‐loop current‐regulated converter. Finally, the chapter focuses on closed‐loop methods of regulating q‐ and d‐axis voltages and currents.

  • A Use of Double Integration in Sigma Delta Modulation

    Sigma delta modulation is viewed as a technique that employs integration and feedback to move quantization noise out of baseband. This technique may he iterated by placing feedback loop around feedback loop, but when three or more loops are used the circuit can latch into undesirable overloading modes. In the desired mode, a simple linear theory gives a good description of the modulation even when the quantization has only two levels. A modulator that employs double integration and two-level quantization is easy to implement and is tolerant of parameter variation. At sampling rates of 1 MHz it provides resolution equivalent to 16 bit PCM for voiceband signals. Digital filters that are suitable for converting the modulation to PCM are also described.

  • Quantization Noise Spectra

    Uniform qunntizers play a fundamental role in digital communication systems and have been the subject of extensive study for many decades, The inherent nonlinearity of quantizers makes their analysis hoth difficult and Interesting, It usually has been accomplished either by assuming the quantizer noise to be a signal-independent, uniform white random process or by replacing the quantizer by a deterministic linear device, or by combining the two assumptions. Such linearizing approximations simplify the analysis and permit the use of linear systems techniques, but few results exist quantifying how good such approximations are for specific systems, These complications are magnified when the quantizer is inside a feedback loop, as for Sigma-Delta modulators. Exact descriptions of the moments and spectra of quantizer noise have been developed recently for the special case of single-loop, multistage and multiloop Signul-Delta modulators. These results demonstrate. that the white noise and linearization assumptions can be quite poor approximations in some systems and quite good in others. It turns out that many of the techniques used in the analysis were first applied to the analysis of quantizers by Clavier, Panter, and Grieg (1947) in pioneering (but often overlooked) work that preceded Bennett's (1948) classic study of quantization noise spectra. We take advantage of the benefit of hindsight to develop several results describing the behavior of quantization noise in a unified and simplified manner. Exact formulas for quantizer noise spectra are developed and applied to a variety of systems and inputs, including scalar quantization (PCM), dithered PCM, Sigma-Delta modulation, dithered Sigma-Delta modulation, two-stage Sigma-Delta modulation, and second-order Sigma-Delta modulation.

  • Multirate Filter Designs Using Comb Filters

    Decimation is an important component of oversampled analog-to-dlgital conversion. It transforms the digitally modulated signal from short words occurring at high sampling rate to longer words at the Nyquist rate. Here we are concerned with the initial stage of decimation, where the word rate decreases to about four times the Nyquist rate. We show that digital filters comprising cascades of integrate-and-dump functions can match the structure of the noise from sigma delta modulation to provide decimation with negligible loss of signal-to-noise ratio. Explicit formulas evaluate particular tradeoffs between modulation rate, signal-to-noise ratio, length of digital words, and complexity of the modulating and decimating functions.

  • A SecondOrder HighResolution Incremental A/D Converter with Offset and Charge Injection Compensation

    Sigma-delta modulation, associated with oversampling and noise shaping, is a well-known technique used in high-accuracy A/D converters. Such converters, required in telecommunications applications, are characterized by ac perfonnance such as signal-to-noise ratio. Moreover, they are mainly dedicated to applications which can tolerate offset and gain errors. On the other hand, measurement and instrumentation applications require absolute accuracy, e.g., offset and gain errors cannot be tolerated. These applications are characterized by dc perfonnance such as differential and integral nonlinearides, offset and gain errors, and they often require high resolution. The second-order incremental A/D converter, which makes use of sigma-delta modulation associated with a simple digital filter, is capable of achieving such requirements. Experimental results, obtained of circuits fabricated in a SACMOS 3-¿m technology, indicate that 15-bit absolute accuracy is easily achievable, even with a low reference voltage.

  • AnalogDigital Conversion

    This chapter contains sections titled: A Self-Calibrating 15 Bit CMOS A/D Converter A Ratio-Independent Algorithmic Analog-to-Digital Conversion Technique A Per-Channel A/D Converter Having 15-Segment µ-255 Companding A Use of Double Integration in Sigma Delta Modulation MOS ADC-Filter Combination That Does Not Require Precision Analog Components A Voiceband 15b Interpolative Converter Chip Set A 12-bit Sigma-Delta Analog-to-Digital Converter with a 15-MHz Clock Rate An 8-bit High-Speed CMOS A/D Converter An 8-MHz CMOS Subranging 8-Bit A/D Converter A Pipelined 5-Msample/s 9-bit Analog-to-Digital Converter



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