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This paper describes a novel power optimized RF amplifier with linear in dB gain steps. Using basic P-N junction diode in 45 nm CMOS process the implemented VGA provides large dynamic range with accurate linear-in-dB gain steps. The gain steps of the VGA do not depend on process variation and has a predictable variation across temperature. The VGA also has an automatic power reduction mechanism which reduces power consumption at low VGA gain.
Circuits and Systems Workshop,(DCAS), 2009 IEEE Dallas
Date of Conference: 4-5 Oct. 2009