Design of wideband CMOS current-mode operational amplifiers

Author

Abou-Allam, Eyad ; El-Masry, Ezz I.

Author_Institution

Dept. of Electr. Eng., Tech. Univ. Nova Scotia, Halifax, NS, Canada

Volume

3

fYear

1995

fDate

30 Apr-3 May 1995

Firstpage

1556

Abstract

This paper presents the design of CMOS current operational amplifiers for high frequency applications. A new design technique is proposed to enhance the frequency behavior of the current amplifier. This approach makes use of current steering to increase the non-dominant pole, and hence, the unity gain bandwidth of the amplifier. A single input differential output current amplifier is described but it can be easily modified for differential input operation. Simulations using HSPICE are presented to confirm the operation of the proposed circuits. The amplifies exhibits a unity gain bandwidth of 200 MHz and a settling time of 5 ns

Keywords

CMOS analogue integrated circuits; HF amplifiers; differential amplifiers; linear network synthesis; operational amplifiers; wideband amplifiers; 200 MHz; 5 ns; CMOS current-mode opamp; current steering; design technique; differential input operation; high frequency applications; nondominant pole; operational amplifiers; single input differential output; unity gain bandwidth; wideband op amp; Bandwidth; Broadband amplifiers; CMOS technology; Circuit simulation; Differential amplifiers; Frequency; Impedance; Operational amplifiers; Transconductance; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1995. ISCAS '95., 1995 IEEE International Symposium on

Conference_Location

Seattle, WA

Print_ISBN

0-7803-2570-2

Type

conf

DOI

10.1109/ISCAS.1995.523703

Filename

523703