Programmable low-pass/high-pass SC-filters

Application notes released by manufacturers rely on the classical filter design; often, these notes suggest standard modes of operation of the SC integrated chip that are suitable for different filter types and realizations. We modify a standard mode of operation of a universal SC filter to design very selective and robust filters based on commercially available integrated switched capacitor (SC) universal building blocks. A low-pass or high-pass filter is obtained by single control signal.