基于多速率信号处理原理,设计了用于下变频的CIC抽取滤波器,由于CIC滤波器结构只用到加法器和延迟器,没有乘法器,很适合用FPGA来实现-This article describes the design of a CIC filter based on the signal processing theory.Because of its structure only using the adder and the delay devices without multiplier,it is