A Design of Current Reused CMOS Mixer with CMFB for Direct Conversion Receiver

This paper represents CMOS direct down-conversion mixer for L-band application based on 0.18 um CMOS technology. The proposed mixer uses current bleeding technique and common-mode feedback (CMFB) circuit. The transconductance stage PMOS transistors that concurrently amplify RF signal and bleed current offer reduction of current in the LO transistors while still maintain the mixer output voltage to reference value. Reduction of current through the LO transistors and resistive loads offers better noise performance as well as better conversion gain.