Design of Active Lowpass Filter with Finite Non-Zero Transmission Zeros Using Tow-Thomas Circuit

摘要

In this paper, an active lowpass filter design method with finite non-zero transmission zeros using Tow-Thomas circuit is given. First, based on the given specifications, a numerical transfer function is calculated. Then, Tow-Thomas building blocks are connected properly according to the obtained transfer function. The symbolic transfer function is then evaluated. Comparing the coefficients of the two transfer functions, the element values can be determined. A design example is given.