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An Area-Efficient Interpolator Applied in Audio Σ Δ DAC
2007 Edition, December 1, 2007 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

An area-efficient 128times interpolation filter (IF) used in audio digital-to-analog converter (DAC) is presented in this paper. The digital interpolation filter consists of cascaded half band filter (HBF) which is followed by a 32timesdigital...

FPGA implementation of polyphase decomposed FIR filters for interpolation used in Δ-Σ audio DAC
2009 Edition, November 1, 2009 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper describes a synthesis design from the MATLAB model into VHDL of a digital interpolation filter algorithm, used in a Δ-Σ Digital-to-Analog converter (DAC), intended for Professional digital audio system. The whole filter system simulation, VHDL...

A 65nm 1.2V 16-bit audio codec sigma-delta DAC with headphone driver
2011 Edition, November 1, 2011 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper reports the measured results of a 16-bit audio codec sigma-delta (Σ-Δ) DAC including a class AB headphone driver, implemented in a 65nm process. The DAC operates with a single 1.2V supply voltage and a 256 times over-sampling ratio, achieving a...

A RC reconstruction filter for a 16-bit audio delta-sigma DAC
2012 Edition, October 1, 2012 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

To build a 16-bit audio delta-sigma (Δ-Σ) digital-to-analog converter (DAC), a low noise reconstruction filter has been presented in this paper. By using the direct charge transfer (DCT) technique, the low noise and small area is implemented. In...

A 1-MHz-Bandwidth Gm-C-Based Quadrature Bandpass Sigma-Delta Modulator Achieving -153.7-dBFS/Hz NSD With Background Calibration
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents a fifth-order continuous-time Gm-C-based quadrature bandpass sigma-delta (Δ Σ) modulator for Internet-of-Things applications. In the presented Δ Σ modulator, a reconfigurable full-scale input amplitude assists the Δ Σ modulator,...

24-bit low-power low-cost digital audio sigma-delta DAC
2011 Edition, Volume 16, February 1, 2011 - Tsinghua University Press Ltd.

This paper describes a low-power low-cost 24-bit Σ-Δ digital-to-analog converter (DAC) for portable digital-audio applications. The interpolation filter uses a no-multiplier scheme to implement the arithmetic units and reading-writing common storage scheme for the...

A 0.4-V Gm-C Proportional-Integrator-Based Continuous-Time Δ Σ Modulator With 50-kHz BW and 74.4-dB SNDR
Volume PP - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents a Gm-C-based Δ Σ modulator under 0.4-V supply. A 3rd-order continuous-time Δ Σ modulator is proposed by cascading three Gm-C proportional integrators (PIs) with a feedforward resistor for the proportional path, which minimizes the output swing of each...

High-Precision Evaluation System Using High-Order Digital Δ∑ Modulator for Digital Audio System
2018 Edition, October 1, 2018 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

In digital audio systems, Δ∑ modulation has widely been adopted in a digital-to-analog converter (DAC) for Class-D amplifiers and an analog-to-digital converter (ADC). To evaluate the Δ∑ modulator, in most cases, a high-performance analog...

A design of 14-bits ΣΔ ADC and DAC for CODEC applications in 0.18 μm CMOS process
2007 Edition, December 1, 2007 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

This paper presents a σ-δ modulation ADC (analog-to-digital converter) and DAC (digital-to-analog converter) for CODEC applications using 0.18 μm CMOS process. In the ADC parts, two σ-δ modulators with 84 dB SNR are designed for the stereo applications, and...

A partial tree vector quantizer dynamic element matching technique for audio Δ-Σ converters
2011 Edition, September 1, 2011 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

Multi-bit Δ-Σ modulators are widely used in performing accurate, low-power, and low cost analogue-to-digital conversion (ADC). One of its major limits is the internal feedback digital-to-analogue converter (DAC) non-linearity. It generates unwanted tones and noise...

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