Title :
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
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;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2011.2157731
