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A 119-dBA Dynamic Range, 3.3-mW Audio CTDSM With a Class-B Resistor DAC and Continuous-Time Quantizer | IEEE Journals & Magazine | IEEE Xplore

A 119-dBA Dynamic Range, 3.3-mW Audio CTDSM With a Class-B Resistor DAC and Continuous-Time Quantizer


Abstract:

Applications requiring far-field voice/audio recording have increased the need for low-power, high dynamic range (DR) audio analog to digital converter (ADC). In these ap...Show More

Abstract:

Applications requiring far-field voice/audio recording have increased the need for low-power, high dynamic range (DR) audio analog to digital converter (ADC). In these applications, the DR specification determines the maximum distance at which a low-cost microphone can obtain a good quality recording. The continuous-time delta–sigma modulator (CTDSM) architecture is typically chosen for audio applications due to its inherent antialiasing property and resistive input. This work presents a high-performance audio CTDSM designed in a 130-nm process. The ADC achieves a DR of 119-dB A-weighted (117-dB unweighted) over a 20-Hz–20-kHz bandwidth while consuming only 3.3 mW.
Published in: IEEE Journal of Solid-State Circuits ( Early Access )
Page(s): 1 - 13
Date of Publication: 03 December 2024

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