A CMOS Digitally Controlled RF Variable Gain Amplifier


A new digitally controlled decibel-linear variable gain amplifier (VGA) is presented. The proposed VGA uses a folded cascode opamp and a capacitance-selecting technique to provide dB-linear gain control. The VGA provides a 36.6dB gain control range with a gain error less than 0.2dB while operating at 1GHz. It can also be operated at 2GHz to give a 28dB gain… (More)
DOI: 10.1109/APCCAS.2006.342368

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