← 返回 JSSC 论文列表JSSC 2012第5期Data Converters0.13μm
A Low-Power High-Fidelity Stereo Audio Codec in 013 mC M O S Xicheng Jiang Jungw
介绍了一种1.5V低功耗立体声音频编解码器，采用0.13μm CMOS工艺。
1.5V, 0.13μm CMOS, 92dB和98dB动态范围, 6.5mA静态电流
低功耗立体声音频编解码器CMOS动态范围Class-AB放大器
▸增强型跨导单元的可编程增益级
▸电容前馈和电容直接反馈的连续时间ADC
▸改进静态电流控制的1mA Class-AB扬声器放大器
Abstract
A 1.5 V low-power stereo audio codec in 0.13 m
CMOS is described. The microphone path includes a pro-
grammable gain stage with an en hanced transconductance cell
followed by a continuous-time
ADC with capacitive feed-for-
ward and capacitive direct feedback. The speaker path employs
a 1 mA Class-AB speaker ampli fier with an improved quiescent
current control circuit that delivers 30 mW to a 32
speaker.
The audio input and output paths achieve 92 and 98 dB dynamic
range, respectively, with 6.5 m