A receiver analog front-end（AFE）with low power consumption for body sensor network is presented.The circuit uses human body channel

and using wideband signal transmission technique

which can transmit data at 20Mb/s with the input sensitivity of 100mV and 0.8V voltoge supply.The on-chip bias circuit provides 50Ω input impedance.The low voltage and low power Cascade structure

which have 25MHz GBW and 58dB gain.A low power consumption current feedback Schmitt trigger circuit with simple structure is proposed.The circuit is designed with SMIC 0.13μm standard CMOS technique

with 0.02mm2 area and power consumption is only 2.2mW with 0.8V voltage supply.