Low voltage rail to rail CMOS current feedback operational amplifier and its applications for analog VLSI

This paper presents a new CMOS current feedback operational amplifier (CFOA ) with rail to rail swing capability at all terminals. The circuit operates as a class AB for lower power consumption. Besides operating at low supply voltages of +/- 1.5 V, the proposed CFOA has a standby current of 200 muA. The proposed CFOA circuit is thus a versatile building block for low volta ge low power applications. The applications of the CFOA to realize a transc onductor/multiplier cell, MOS-C differential integrator, MOS-C bandpass fil ter and MOS-C oscillator are given. PSpice simulations based on 1.2 mum lev el three parameters obtained from MOSIS are given.