A Comparative Analysis of Peaking Methods for Output Stages of Broadband Amplifiers

Author

Knochenhauer, Christian ; Sedighi, Behnam ; Ellinger, Frank

Author_Institution

Dept. of Circuit Design & Network Theor., Tech. Univ. of Dresden, Dresden, Germany

Volume

58

Issue

11

fYear

2011

Firstpage

2581

Lastpage

2589

Abstract

This paper presents a general analysis of peaking methods in output stages of amplifiers for broadband communication systems. It is shown that common peaking methods, although providing significant signal bandwidth enhancement ratios (BWER), are limited to 30%-50% of their speed potential by output matching requirements. A modified T-coil peaking is analyzed which enhances both signal bandwidth and output matching frequency range by up to 200% compared to common peaking methods. A broadband amplifier using this inductive output matching with 69-GHz bandwidth implemented in a 0.25 μm SiGe BiCMOS technology is presented to prove the validity of the analysis.

Keywords

BiCMOS integrated circuits; Ge-Si alloys; wideband amplifiers; BiCMOS technology; SiGe; bandwidth 69 GHz; bandwidth enhancement ratio; broadband amplifiers; broadband communication systems; modified T-coil peaking; peaking methods; size 0.25 mum; Bandwidth; Broadband communication; Capacitance; Impedance matching; Inductance; Inductors; Poles and zeros; BiCMOS; broadband amplifiers; inductive peaking; output matching; t-coil peaking;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2011.2157731

Filename

5941016