Distributed biasing of differential RF circuits

Author

Fathelbab, Wael M. ; Steer, Michael B.

Author_Institution

Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA

Volume

52

Issue

5

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

1565

Lastpage

1572

Abstract

A distributed balun is presented as an alternative to inductor-based biasing of active differential circuits. The new scheme has broad bandwidth with low loss and is suited to broad-band multifunctional RF and microwave circuits. Additionally, the distributed biasing circuit discriminates between differential and common-mode signals leading to high common-mode rejection. Measured gains, centered at 580 MHz, of a selected pseudodifferential amplifier using the new biasing circuit confirm the underlying theory.

Keywords

active networks; baluns; differential amplifiers; microwave integrated circuits; 580 MHz; active differential circuits; broad band multifunctional RF circuit; common mode rejection; common mode signals; differential RF circuits; inductor based biasing circuit; microwave circuits; pseudodifferential amplifier; Circuit noise; Coupling circuits; Differential amplifiers; Equations; Impedance matching; Inductance; Inductors; Power transmission lines; Radio frequency; Radiofrequency amplifiers;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2004.827048

Filename

1295156