Low voltage digitally controlled dB-linear CMOS VGA circuit for wireless communication

H.O Elwan,M Ismail

doi:10.1109/icecs.1998.813336

Low voltage digitally controlled dB-linear CMOS VGA circuit for wireless communication

H.O Elwan, M Ismail

https://doi.org/10.1109/icecs.1998.813336

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Publication Date: Sep 7, 1998

Citations: 8

Affiliation: The Ohio State University

#Variable Gain Amplifier #dB-linear Variable Gain Amplifier + Show 8 more

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Abstract

A new digitally controlled dB-linear variable gain amplifier (VGA) circuit is presented. The circuit is developed taking into account system level issues for a direct conversion receiver. The circuit uses a novel technique to digitally implement a dB-linear gain characteristic of 25 dB. The proposed VGA can process voltage or current input signals and operates in a fully differential configuration. APLAC simulations and experimental results from a 2 /spl mu/m chip fabricated through MOSIS are provided.

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