Design for a 6th order, 0.5dB ripple Chebychev high-pass using the Sallen-Key topology Figure 1 shows the classic topology for a 2 nd order high pass filter using a single op amp imbedded in an RC ...

The transfer functions HLOOP (s) and HFW (s) are (12) (13) The overall filter transfer function HF (s) is given by (14) Indeed, if we substitute equations 12 and 13 into Equation 14 , we get the ...

Sallen and Key filter puzzle with LTspice I was concocting a rather silly low-pass filter design, when I remembered that Messrs Sallen and Key did it better in the 1950s, and decided to use their ...