A Switched-Capacitor Band-Pass Filter For Low-Voltage Applications

Abstract

A switched-capacitor (SC) biquad band-pass filter for very low-voltage applications is designed and fabricated in 1 m CMOS process, which can operate at 1V supply voltage, consuming 287 W at room temperature. In the SC filter circuit proposed, a novel rail-to-rail operational amplifier is used to obtain the maximum dynamic range. The band-pass filter has BW -3dB =101Hz at its central frequency of 376Hz.