International Association of Engineers
Mixer is one of the most important parts in the transceiver. In the receiver, a downmixer is followed by the low-noise amplifier. It changes the RF signal to low frequency signal, achieving the conversion of frequency. A design of A 1.9GHz downmixer based on TSMC 0.18um is presented, using Gilbert configuration. The conversion gain is about 12.8dB, the noise figure is about 13.6dB and IIP3 is about 0.068dBm with -25dBm LO input signal. The power supply is 3V and the design is based on TSMC 0.18um technology.