Publication
RFIC 2016
Conference paper

A 28GHz SiGe BiCMOS phase invariant VGA

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Abstract

The paper describes a technique to design a phase invariant variable gain amplifier (VGA). Variable gain is achieved by varying the bias current in a BJT, while the phase variation is minimized by designing a local feedback network such that the applied base to emitter voltage has a bias-dependent phase variation which compensates the inherent phase variation of the transconductance. Two differential 28GHz VGA variants based on these principles achieve -13dBm while consuming 35mW.

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Publication

RFIC 2016

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