Sallen-Key High-Pass Filter with Unrelated Tune of Generic Parameter

New second order high-pass filter of the Sallen-Key family circuit is considered, where there is unrelated tune of generic parameters by a digitally controlled resistor - the pole frequency, Q-factor pole and the scale transfer coefficient. The basic mathematical expressions of transfer function for proposed high-pass filter are obtained. A comparison of the parameters of the known and new schemes is given. A Sallen-Key high-pass filter circuit based on a high-frequency emitter follower has been developed. The results of high-pass filter modeling in the Micro-Cap 12 environment using the OP37 operational amplifier and an ideal buffer amplifier are presented. Computer simulation has shown that the pole frequency is adjusted by resistor R5. Adjusting the pole attenuation is possible by changing the resistor R3, while the pole attenuation frequency unchanged, an increase in R3 leads to an increase of the pole attenuation.