Up-conversion mixers in a complementary 0.4 mu m SiGe process
In this paper a 0.4 mu m complementary SiGe process is used to fabricate up-conversion mixers for base-station applications. A current feedback mixer, and a mixer with a folded input, were designed in order to test benefits obtainable from the use of equally fast PNP- and NPN-transistors. The target was to improve linearity and to increase output compression point (OP-1dB) of the mixers. A +5 dBm output compression point @2 GHz was measured while drawing 43 mA from 5 V voltage supply.
mixer complementary sige microwave frequency conversion