Abstract: We report a low power ASK IF receiver for short-range wireless systems,which includes an AGC loop that compensates the channel attenuation and an ASK detector.A novel current-limited transconductor and feed-forward differential peak detector have been designed to maintain a high compression ratio and fast response for the AGC with lower power consumption.A storage unit with a zero and a feed-forward structure have been introduced into the peak detector to control the damping characteristic of the AGC loop.A rectifier and low-pass filter included in the ASK detector have been integrated into a more compact structure to further lower the power consumption.The simulation results show the feasibility of the proposed technique.

Key words: CMOS, AGC, ASK demodulator, ASK detector