New method of microwave analysis of the differential amplifier

Author

Gonzalez, Javier

Author_Institution

Dept. of Electr. Eng., Ecole Polytech. de Montreal, Que., Canada

Volume

2

fYear

1995

fDate

5-8 Sep 1995

Firstpage

745

Abstract

This article proposes an analysis of the high-frequency and wideband limitations of the differential amplifier caused by poor common-mode rejection, and suggests new microwave structures based on MESFETs to broaden the band of operation. In practice the coupling impedance of the differential amplifier and the cut-off frequency of the transistor employed are the determining factors for the maximum reduction of the common mode. The analysis shows that an adequate coupling impedance and transistor enable the wideband behaviour of the differential amplifier to be improved. Simulations implemented from an equivalent circuit confirm the new analytic approach

Keywords

MESFET circuits; differential amplifiers; equivalent circuits; microwave amplifiers; wideband amplifiers; MESFETs; common-mode rejection; coupling impedance; cut-off frequency; differential amplifier; equivalent circuit; high-frequency wideband characteristics; microwave analysis; simulation; transistors; Analytical models; Circuit simulation; Coupling circuits; Cutoff frequency; Differential amplifiers; Equivalent circuits; Impedance; MESFETs; Microwave theory and techniques; Microwave transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 1995. Canadian Conference on

Conference_Location

Montreal, Que.

ISSN

0840-7789

Print_ISBN

0-7803-2766-7

Type

conf

DOI

10.1109/CCECE.1995.526402

Filename

526402