一种自动频率调谐高频跨导电容滤波器  

A High-Frequency Transconductance-C Filter with Automatic Tuning

作　　者：东振中[1] 邹雪城[1] 刘三清 李乃平 

机构地区：[1]华中科技大学电子科学与技术系

出　　处：《微电子学》2002年第5期386-388,共3页Microelectronics

摘　　要：采用 Bi CMOS工艺 ,设计了可自动频率调谐的高频跨导 -电容滤波器。在跨导电路中 ,使用有源负阻稳定共模信号 ,提高直流增益。在频率调谐电路中 ,利用锁相回路比较参考频率与滤波器输出频率的相差 ,进而调节滤波器特性。A BiCMOS transconductance C filter with automatic tuning for applications in the high frequency range is presented in the paper In the OTA sub circuit, active negative resistors are used to control common mode signals and improve DC gains In the frequency tuning sub circuit, the phase difference between reference signal and output signal of the filter is detected using a phase locked loop, so as to adjust performance of the filter

关 键 词：跨导放大器 频率调谐 滤波器 锁相回路 模拟集成电路 

分 类 号：TN713[电子电信—电路与系统] TN433