← 返回 JSSC 论文列表JSSC 2012第12期RF & Wireless65nmNeural Network Accelerator
Widely Tunable 4th Order Switched G -C Band-Pass Filter Based on N-Path Filters
基于N路径滤波器的可调谐四阶带通滤波器设计
0.4-1.2 GHz可调范围，21 MHz恒定带宽，55 dB抑制比，10 dB噪声系数
带通滤波器N路径滤波器频率可调CMOS电容分压
▸采用两个中心频率略有差异的二阶四路径滤波器相减实现四阶带通滤波
▸通过电容分压技术减少两个四路径滤波器间的相互负载并提高品质因数
▸利用-C技术实现中心频率相对于时钟频率的微调
Abstract
A widely tunable 4th order BPF based on the subtrac-
tion of two 2nd order 4-path passive-mixer filters with slightly dif-
ferent center frequencies is proposed. The center frequency of each
4-path filter is slightly shifted relative to its clock frequency (one
upward and the other one downward) by a
-C technique. Ca-
pacitive splitting of the input signal is used to reduce the mutual
loading of the two 4-path BPFs and increase their quality factors.
The filter is tunable from 0.4 GHz to 1.2 GHz wi