← 返回 JSSC 论文列表JSSC 2006第12期Power Management0.5μm CMOS
A 5-V AC-Powered CMOS Filter-Selectivity Booster for POTS/ADSL Splitter
一种用于POTS/ADSL分离器的5V交流供电CMOS选择性增强器，实现70dB衰减和0.2dB平坦度
70dB衰减@30kHz, 0.2dB通带平坦度, 50mW功耗@5V AC
POTS分离器ADSL滤波器CMOS芯片选择性增强有源滤波器
▸采用小型外部低通滤波器与选择性增强芯片组合
▸第五阶连续时间滤波器设计
▸集成低输出阻抗驱动器和有源整流器
Abstract
An active POTS filter consisting of a small external - low-pass filter and a selectivity booster chip is presented. The filter achieves an ADSL attenuation of more than 70 dB at 30 kHz while maintaining a passband flatness of 0.2 dB. This active filter requires fewer transformers and is smaller than a passive filter with the same performance. The 0.5- m CMOS booster chip con- tains a fifth-order continuous-time filter, a low output-impedance driver, and an active rectifier and consumes 50 mW from a 5-V AC supply.