Active comb filter using voltage differencing transconductance amplifiers

Abstract

A new active comb filter employing Voltage Differencing Transconductance Amplifiers (VDTAs) is proposed to eliminate the selected frequencies of different signals. The proposed filter is based on VDTAs, capacitors and resistors. The functionality of the circuit is verified using PSPICE with TSMC CMOS 0.18μm process parameters for test signals of 50, 150, 250, and 350 Hz.