Design Technique of CMOS Mixer

The development of wireless communication offers challenge on frontend circuit of transceiver. Mixer is an important building block in RF frontend to achieve frequency translation. the basic operating principle of CMOS mixer is introduced, the mixer structures in common use are presented, along with theirs virtue and shortcomings. The main design techniques of mixer,authors’ research on linearity analysis of transconductance are also presented, along with a new topology of mixer authors designed.