ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Low-Voltage CMOS Current Feedback Operational Amplifier and Its Application

  • Mahmoud, Soliman A. (Electrical Engineering Department, German University) ;
  • Madian, Ahmed H. (Electronics and Communications Department, Cairo University) ;
  • Soliman, Ahmed M. (Electronics and Communications Department, Cairo University)
  • Received : 2006.07.02
  • Published : 2007.04.30
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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 ${\pm}0.75V$ with a total standby current of 304 ${\mu}A$. The circuit exhibits a bandwidth better than 120 MHz and a current drive capability of ${\pm}1$ mA. An application of the CFOA to realize a new all-pass filter is given. PSpice simulation results using 0.25 ${\mu}m$ CMOS technology parameters for the proposed CFOA and its application are given.

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