A 1V fully integrated CMOS transformer based mixer with 5.5dB gain, 14.5dB SSB noise figure and 0dBm input IP3

A fully integrated low voltage mixer topology is presented. The problem of stacking input-, cascade- and switching-transistors within 1 V supply voltage is solved by inserting a transformer, optimized for high coupling and high-self resonance frequency. A fully integrated test chip aiming at UMTS applications around 2 GHz to demonstrate the feasibility was manufactured in INFINEON low-cost 0.13 /spl mu/m 6 metal standard CMOS process. The single-ended mixer, including the on chip resistive 50 /spl Omega/ termination, features a gain of 5.5 dB, a SSB noise figure of 14.5 dB, an input 1 dB compression point of -10 dBm consuming 40 mW at a power supply voltage of 1 V. The mixer 3 dB-bandwidth ranges from 1.3 GHz up to 4.1 GHz.