A wideband CMOS current-mode operational amplifier and its use for band-pass filter realization


Altun M. , Kuntman H.

International Conference on Applied Electronics, Pilsen, Czech Republic, 6 - 07 September 2006, pp.3-6 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/ae.2006.4382949
  • City: Pilsen
  • Country: Czech Republic
  • Page Numbers: pp.3-6

Abstract

In this paper, a CMOS current-mode operational amplifier (COA) based on a novel, class A input stage and a folded-cascode output stage is presented. The amplifier provides a 95 dB DC gain and a gain-bandwidth product exceeding 200 MHz. The COA is operated under +/-1.5 V voltage supplies and designed with 0.35-mu m CMOS process. Additionally, COA-based band-pass filter is realized. In a multiple feedback band-pass filter topology, COA can be used instead of voltage amplifier to enhance the bandwidth of operation. The center frequency of the filter is 10 MHz.