High-frequency nonlinearity analysis of common-emitter and differential-pair transconductance stages

Author

Fong, Keng Leong ; Meyer, Robert G.

Author_Institution

Electron. Res. Lab., California Univ., Berkeley, CA, USA

Volume

33

Issue

4

fYear

1998

fDate

4/1/1998 12:00:00 AM

Firstpage

548

Lastpage

555

Abstract

Equations describing the high-frequency nonlinear behavior of common-emitter and differential-pair transconductance stages are derived. The equations show that transconductance stages using inductive degeneration are more linear than those using capacitive or resistive degeneration, and that the common-emitter transconductance stages are more linear than the differential-pair transconductance stages with the same bias current and transconductance. The nonlinearity equations can also be used to explain the class AB behavior of the common-emitter transconductance stage with inductive degeneration

Keywords

Volterra series; bipolar analogue integrated circuits; circuit optimisation; differential amplifiers; electric distortion; bias current; class AB behavior; common-emitter transconductance stages; differential-pair transconductance stages; high-frequency nonlinearity analysis; inductive degeneration; Circuits; Differential equations; Impedance; Linearity; Noise figure; Nonlinear distortion; Nonlinear equations; Radio frequency; Resistors; Transconductance;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.663559

Filename

663559