A low power high linearity CMOS folded mixer for WiMAX application

A low power high linearity folded mixer for 3.6 GHz WiMAX application is presented in this paper. The circuit was designed with TSMC 0.18μm CMOS process. An RF PMOS is used to improve the linearity. The proposed folded mixer has the conversion gain of 4.4dB with LO power at -5dBm. The IIP3 is 5.5dBm, noise figure is 11.6dB, and the power consumption is 2.636mW without output buffer. The total power consumption with output buffer is only 4.4mW under a 1V supply voltage.