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Title: A 0.6-V 82-dB 28.6-μW continuous-time audio deltasSigma modulator
Authors: Zhang, J.
Lian, Y. 
Yao, L.
Shi, B.
Keywords: CMOS technology
Delta-Sigma modulator
Issue Date: Oct-2011
Citation: Zhang, J., Lian, Y., Yao, L., Shi, B. (2011-10). A 0.6-V 82-dB 28.6-μW continuous-time audio deltasSigma modulator. IEEE Journal of Solid-State Circuits 46 (10) : 2326-2335. ScholarBank@NUS Repository.
Abstract: The design of a low-voltage low-power fourth-order single-bit continuous-time Delta-Sigma modulator is presented in this paper for audio applications. The modulator employs an input-feedforward topology in order to reduce internal signal swings, thus relaxes the linearity and slew rate requirements on amplifiers leading to low-voltage operation and low-power consumption. The energy efficiency is further improved by embedding the summation of feedforward paths into the quantizer. For low-voltage operation, a gain-enhanced fully-differential amplifier and a body-driven rail-to-rail input CMFB circuit are developed. The modulator, implemented in a 0.13-μm standard CMOS technology with a core area of 0.11 mm2, achieves an 82-dB dynamic range (DR), and a 79.1-dB peak signal-to-noise and distortion ratio (SNDR) over a 20-kHz signal bandwidth. The power consumption of the modulator is 28.6 μW under a 0.6-V supply voltage. The achieved performance make it one of the best among state-of-the-art sub-1-V modulators in terms of two widely used figures of merit. © 2011 IEEE.
Source Title: IEEE Journal of Solid-State Circuits
ISSN: 00189200
DOI: 10.1109/JSSC.2011.2161212
Appears in Collections:Staff Publications

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