A 2.2 mW, 40 dB Automatic Gain Controllable Low Noise Amplifier for FM Receiver

摘要

This paper presents an automatic gain controllable low noise amplifier (AGC-LNA) for FM receiver (FMRx). The proposed LNA adopts current reused dual -boosting technique for the power saving. And, a simple analog type automatic gain control (AGC) loop is proposed that provides high resolution gain control. Implemented in a 65 nm CMOS technology, measurements show power regulation range of 40 dB with 1 dB error, less than 11 dB of S11, variable voltage gain range of 12 to 30 dB over the frequency range of 88108 MHz, noise figure (NF) of less than 2.9 dB, P1dB of higher than 24.2 dBm, and IIP3 of higher than 12.7 dBm in the high gain (HG) mode, while dissipating only 1.8 mA from a 1.2 V supply, respectively.