Transversal filter having an analog shift register

摘要

A transversal filter has an analog shift register exhibiting a series input and a plurality of parallel outputs which are connected to a summing and/or subtracting circuit. A simple realization of signal weighting circuits assigned to the stages of the shift register is achieved in that n signal weighting devices assigned to a group of n stages are disposed in a signal path which extends from the input of the first stage of the group over all stages thereof and in that the signal weighting devices of the n stages respectively weight according to filter coefficients b1-bn which occur in the system function H(z)=b0x(1+b1xz(1+b2xz(. . . (1+bnxz)))) determining the filtered signal, where z represents the delay time per stage for each signal value. The transversal filter of the invention is useful in analog filters of communications technology.