A 54 MHz-880 MHz low-noise variable-gain amplifier (LNA) for use in cable TV tuners is designed in a 0.18-mum CMOS process. An active shunt feedback is used to achieve wideband input matching without degrading the noise figure. Inductive shunt-peaking is employed at the output to extend bandwidth. The LNA gain can be tuned from 10 dB to 22 dB. The amplifier measures a NF of 2.8dB in the high-gain setting, IIP3 of 5.0dBm at low-gain setting and draws a current of 23mA from a 1.8-V supply
Published in:
Asian Solid-State Circuits Conference, 2005
Date of Conference: Nov. 2005