A High Performance CMOS Monolithic IF Receiver

This paper describes a CMOS low voltage low power monolithic IF receiver,which includes the modules of mixer,limiting amplifier,demodulator,RSSI,mute control and data shaping etc.It can be used as a short distance FM/FSK signal receiver and demodulator.The receiver is fabricated using 1st Silicon 0.25 μm CMOS technology.Testing results show that the sensitivity of the receiver is-103 dBm and its RF input frequency can be up to 100 MHz.The maximum frequency deviation of the input FM signal can be as wide as about 20 kHz and the typical demodulation gain constant is 40 mV/kHz.The demodulated signal SFDR for 3 kHz frequency deviation FM signal is 41.3 dB.Its supply voltage ranges from 2 V to 4 V and the current consumption is 3 mA.The effective chip area is 0.25 mm~2.