A variable gain CMOS amplifier with exponential gain control

Abstract

A variable gain amplifier architecture suitable for foundry CMOS is constructed using linearized transconductance blocks. The use of a four-transistor transconductance cell allows for wider gain range and larger signal swing under low supply conditions than the simple differential pair used in previous work. Experimental results with 0.6 /spl mu/m CMOS show… (More)

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