Design of current mode operational amplifier with differential-input and differential-output

Author

Cheng, Kuo-Hsing ; Wang, Huei-Chi

Author_Institution

Dept. of Electr. Eng., Tamkang Univ., Taipei Hsien, Taiwan

Volume

1

fYear

1997

fDate

9-12 Jun 1997

Firstpage

153

Abstract

In this paper, a CMOS implementation of a current operational amplifier (COA) with a differential input and a differential output is described. The amplifier is configured from a differential current mirror input transimpedance stage followed by a differential output transconductance gain stage. A differential mode design technique is proposed and used in the feedback circuit. This configuration is the current mode counterpart of the traditional voltage mode operational amplifier (VOA). In this design, the simulation results exhibit an open-loop differential gain of 51.71 dB with the gain-bandwidth product 314 MHz and a settling time of 14 ns

Keywords

CMOS analogue integrated circuits; circuit analysis computing; differential amplifiers; digital simulation; feedback amplifiers; integrated circuit design; operational amplifiers; 14 ns; 51.71 dB; CMOS implementation; current mirror input transimpedance stage; current mode operational amplifier; differential mode design technique; differential-input amplifier; differential-output amplifier; feedback circuit; gain-bandwidth product; open-loop differential gain; settling time; simulation results; transconductance gain stage; Analog circuits; Circuit simulation; Differential amplifiers; Feedback circuits; Impedance; Mirrors; Operational amplifiers; Signal processing; Transconductance; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on

Print_ISBN

0-7803-3583-X

Type

conf

DOI

10.1109/ISCAS.1997.608639

Filename

608639