CMOS balanced output transconductor and applications for analog VLSI

Abstract

A new CMOS programmable balanced output transconductor (BOTA) is introduced. The BOTA is a useful block for continuous-time analog signal processing. A new CMOS realization based on MOS transistors operating in the saturation region is given. Application of the BOTA in realizing bandpass–lowpass–allpass–notch biquad mixed mode filter using four BOTAs and two grounded capacitors and in realizing current mode MOS-C oscillators using three or four BOTAs and two grounded capacitors are given. PSpice simulation results for the BOTA circuit and for its applications are also included.