基于甚低频的开关电容滤波器仿真研究  

Simulation Research of Switched Capacitor Filter Based on Very Low Frequency

作　　者：徐瑞 XU Rui(The 722th Research Institute of China Shipbuilding Industry Corporation,Wuhan 430205)

机构地区：[1]中国船舶重工集团公司第七二二研究所,武汉430205

出　　处：《舰船电子工程》2020年第7期107-111,共5页Ship Electronic Engineering

摘　　要：在甚低频通信频段,传统的超外差式接收机需利用混频电路将信号搬至固定中频再进行选择和放大。该设计利用开关电容滤波器实现中心频率可变的带通滤波器,可直接对甚低频信号进行选择,论文通过对开关电容滤波器的研究与仿真,实现了一种可变中心频率的带通滤波器。In the very low frequency communication band,the conventional superheterodyne receiver uses a mixing circuit to move the signal to a fixed intermediate frequency for selection and amplification. This design uses a switched-capacitor filter to realize a band-pass filter with a variable center frequency to directly select the very low-frequency signal. In this paper,a variable-center frequency band-pass filter is realized by research and simulation of the switched-capacitor filter.

关 键 词：开关电容积分器 可变中心频率 滤波器 

分 类 号：N945.13[自然科学总论—系统科学]