Title :
A novel modification scheme for the state variable filter to improve its high frequency performance
Author :
Báez-lópez, David ; Flores-Verdad, Guillenno Espinosa
Author_Institution :
Inst. Nacional de Astrofisica, Opt. y Electron., Puebla, Mexico
Abstract :
The state variable filter, also known as the KHN filter, is well known for its low sensitivities to the passive elements. However, its sensitivities to the finite gain product of the operational amplifiers limit its performance for high frequencies. We propose a new modification scheme to improve its behavior at high frequencies. This modification consists of providing a positive feedback in the summing amplifier. Simulation results are presented and a comparison of the results with the conventional KHN filter and other state variable filters are presented
Keywords :
RC circuits; active filters; band-pass filters; feedback amplifiers; operational amplifiers; KHN filter; active RC filter; band pass filter; finite gain product; high frequency performance; low sensitivities; modification scheme; operational amplifiers; passive elements; positive feedback; simulation results; state variable filter; summing amplifier; Band pass filters; Cutoff frequency; Negative feedback; Nonlinear filters; Operational amplifiers; Optical amplifiers; Optical filters; Passive filters; Resistors; Topology;
Conference_Titel :
Communications, Computers and Signal Processing, 1997. 10 Years PACRIM 1987-1997 - Networking the Pacific Rim. 1997 IEEE Pacific Rim Conference on
Conference_Location :
Victoria, BC
Print_ISBN :
0-7803-3905-3
DOI :
10.1109/PACRIM.1997.619923
