← 返回 JSSC 论文列表JSSC 2012第11期RF & Wireless0.153μm CMOS
A High-PSRR Recon figurable Class-ABD Audio Amplifier Driving a Hands-FreeReceiver
设计了一种高PSRR可配置AB/D类音频放大器，适用于便携式设备直接电池供电。
106 dB/100 dB PSRR (217 Hz/1 kHz), 46 mW输出功率(接收模式), 1.23 W最大输出功率(1% THD), 90%以上效率(D类模式)
高PSRR可配置放大器AB/D类音频放大器电池供电
▸采用电池电压跟踪共模参考(BA VTCMR)生成器
▸伪差分拓扑结构
▸通过低噪声运放和电容实现配置切换
Abstract
A high-power-supply-rejection-ratio (PSRR), recon-
figurable class-AB/D audio power ampli fier is designed for direct
battery hookup in portable applications. The proposed design
employs the on-chip battery voltage tracking common-mode refer-
ence (BA VTCMR) generator and the pseudo-differential topology
to achieve the high SNR requirement in a hands-free/receiver
2-in-1 loudspeaker. This ampli fier can achieve 106 dB/100 dB
PSRR at 217 Hz and 1 kHz, respectively. In receiver mode, this
design can