2007•ETRI JournalOpen access

Low-Voltage CMOS Current Feedback Operational Amplifier and Its Application

Soliman Awad Mahmoud, Ahmed Hassan Madian, Ahmed M. Soliman

Abstract

A novel low-voltage CMOS current feedback operational amplifier (CFOA) is presented. This realization nearly allows rail-to-rail input/output operations. Also, it provides high driving current capabilities. The CFOA operates at supply voltages of ±0.75 V with a total standby current of 304 µA. The circuit exhibits a bandwidth better than 120 MHz and a current drive capability of ±1 mA. An application of the CFOA to realize a new all-pass filter is given. PSpice simulation results using 0.25 µm CMOS technology parameters for the proposed CFOA and its application are given.

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Key concepts: Current-feedback operational amplifier, Operational amplifier, CMOS, Op amp integrator, Current (fluid), Electrical engineering, Engineering, Electronic engineering