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本文论述可编程FIR数字滤波器的原理和实现。由于采用可编程RAM循环移位寄存器和时分单路存贮平方ROM乘法器,因而本滤波器可通过程控方式,在一定范围内快速调节单位取样响应的长度和权值,改变处理数据的速率,选择处理信号的形式(数字或模拟)等。本滤波器具有结构简单,硬件量少及使用灵活等特点,是一种多功能的通用滤波系统。
This article discusses the programmable FIR digital filter theory and implementation. Due to the programmable RAM cyclic shift register and time-division single-channel storage square ROM multiplier, the filter can be programmed to quickly adjust the length and weight of the unit sampling response within a certain range, to change the processing data rate, Select the form of signal processing (digital or analog) and so on. The filter has the advantages of simple structure, less hardware and flexible use, and is a versatile universal filtering system.