Title :
A scheme for the KHN state variable filter to improve its high frequency performance
Author :
Báez-lópez, David ; Espinosa, Guillermo ; Jurez, L.I.V. ; Hernández, Fernando Mendoza ; Romero, Genaro Olivera ; Ramirez, Juan Manuel
Author_Institution :
Dept. de Ingenieria Electron., Univ. de las Americas-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 bandwidth product of the operational amplifiers limit its performance for high frequencies. This modification consists in providing a positive feedback in the summing amplifier. Simulation of the proposed scheme and a comparison of the results with the conventional KHN filter is presented
Keywords :
active filters; circuit feedback; operational amplifiers; sensitivity analysis; summing circuits; KHN state variable filter; finite gain bandwidth product; high frequency performance; operational amplifiers; passive element sensitivities; positive feedback; summing amplifier; Filters; Frequency;
Conference_Titel :
Circuits and Systems, 1998. Proceedings. 1998 Midwest Symposium on
Conference_Location :
Notre Dame, IN
Print_ISBN :
0-8186-8914-5
DOI :
10.1109/MWSCAS.1998.759526
