Title :
Reducing spread resistance in high Q state variable filters
Author :
Báez-lópez, David ; Guillermo, E.F.V. ; Silva-Martínez, José
Author_Institution :
Univ. de Las Americas, Puebla, Mexico
Abstract :
In this paper we propose a method to reduce the resistance spread in the high Q realizations of the KHN and Tow-Thomas state variable filters. This resistance spread is reduced by noting that a single resistor controls the value of the pole Q, thus by substituting this resistor by a T of resistors it is possible to reduce the spread by up to a factor of 10. Simulations confirm the proposed technique
Keywords :
Q-factor; biquadratic filters; poles and zeros; transfer functions; KHN filters; Tow-Thomas filters; filter biquads; high Q realizations; pole Q; spread resistance; state variable filters; Active filters; Band pass filters; Dynamic range; Frequency; Low pass filters; Operational amplifiers; Optical filters; Passive filters; Resistors; Transfer functions;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.704183
