Design and Implementation of a 1-V Low Flicker Noise Direct Conversion Mixer at 5.5 GHz using a 90nm CMOS RF Technology

In this paper a direct conversion mixer that adopts a passive mixing stage and achieves very good flicker noise performance is presented. The mixer achieves 7.4 dB of voltage conversion gain with a flicker noise corner frequency of 2 kHz and Third Order Input Intercept Point (IIP3) of 10 dBm. The circuit consumes only 4.5 mW from a 1 - V supply and it was implemented in a 90 nm CMOS RF technology.