A dual-band 1.7V CMOS variable gain low noise amplifier

The design and simulation of a dual-band monolithic low noise amplifier, with active balun and gain control integrated on the same die, is presented on this paper. The circuit includes an internal DAC, allowing sixteen gain levels with digital control. The fully integrated circuit was implemented in a 0.35 mum AMS CMOS standard technology and simulated with BSIM3 model. Simulations show a 16 dB (1 dB/step) dynamic gain variation in a 1.4-1.7 GHz band (includes dual sub-bands), a phase and transducer gain magnitude errors less than 1.6deg and 0.2 dB, respectively, a 1.24 dB noise figure and -23 dBm input-referred 1 dB compression point both at maximum gain, 50 Omega input and output match, while drawing less than 7.5 mA from a 1.7 V power supply, including analog and digital system.