A simple and accurate method for calculating the low frequency common-mode gain in a MOS differential amplifier with a current-mirror load

Author

Jiang, Ruoxin ; Tang, Haiming ; Mayaram, Kartikeya

Author_Institution

Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA

Volume

43

Issue

3

fYear

2000

fDate

8/1/2000 12:00:00 AM

Firstpage

362

Lastpage

364

Abstract

A simple and accurate analysis is presented for the low frequency common-mode gain of a metal oxide semiconductor (MOS) differential pair with a current-mirror load. The circuit is shown to be symmetric when the output conductance of the diode connected transistor is not ignored. This allows use of a half-circuit analysis and an accurate expression for the common-mode gain can be easily derived. The gain expressions in some previous textbook analyses are shown to be inaccurate

Keywords

MIS devices; amplification; current mirrors; differential amplifiers; load (electric); semiconductor device models; MOS differential amplifier; current-mirror load; differential pair; diode connected transistor; half-circuit analysis; low frequency common-mode gain calculation; output conductance; Analog circuits; CMOS technology; Circuit analysis; Computational modeling; Differential amplifiers; Frequency; SPICE; Semiconductor diodes; Signal analysis; Transconductance;

fLanguage

English

Journal_Title

Education, IEEE Transactions on

Publisher

ieee

ISSN

0018-9359

Type

jour

DOI

10.1109/13.865215

Filename

865215