A Low-Power, High-Fidelity Stereo Audio Codec in 0.13 μm CMOS

被引：16

作者：

Jiang, Xicheng ^{[1
]}

Song, Jungwoo ^{[1
]}

Chen, Jianlong ^{[1
]}

Chandrasekar, Vinay ^{[1
]}

Galal, Sherif ^{[1
]}

Cheung, Felix Y. L. ^{[1
]}

Cheung, Darwin ^{[1
]}

Brooks, Todd L. ^{[1
]}

机构：

[1] Broadcom Corp, Irvine, CA 92617 USA

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 2012年 / 47卷 / 05期

关键词：

Capacitive direct feedback; capacitive-feed forward; class-AB amplifier; continuous-time Sigma Delta ADC; microphone interface; quiescent current control; replica bias; speaker interfaces; stereo audio codec; transconductance cell; AMPLIFIER;

D O I：

10.1109/JSSC.2012.2185591

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A 1.5 V low-power stereo audio codec in 0.13 mu m CMOS is described. The microphone path includes a programmable gain stage with an enhanced transconductance cell followed by a continuous-time Sigma Delta ADC with capacitive feed-forward and capacitive direct feedback. The speaker path employs a 1 mA Class-AB speaker amplifier with an improved quiescent current control circuit that delivers 30 mW to a 32 Omega speaker. The audio input and output paths achieve 92 and 98 dB dynamic range, respectively, with 6.5 mA total quiescent current.

引用

页码：1221 / 1231

页数：11

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