DESIGN OF CMOS BASED FM QUADRATURE DEMODULATOR USING 45NM TECHNOLOGY

Abstract

This paper presents the design of CMOS based FM Quadrature Demodulator for RF integrated circuits. This circuit is based on Bilotti’s quadrature demodulator that uses a phase shift network, phase detector, and a low  pass filter to filter out the high-frequency components. Phase shift network is an external RLC network. The Phase detector is implemented using Gilbert Cell and low pass filter using an operational amplifier. The power consumption of the circuit is 198uw with 1.2V supply.