Reducing spread resistance in high Q state variable filters
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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 resistor it is possible to reduce the spread by up to a factor of 10. Simulations confirm the proposed technique.
author list (cited authors)
Baez-Lopez, D., Verdad, G., & Silva-Martinez, J.