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A UWB receiver with carrier that has 400 MHz cut-off frequency, 73 dB dynamic range and -70 dBm input sensitivity was generated in 0.13 um CMOS technology for applying to the both IR and MB-OFDM UWB transceiver. LNA and VGA have the broad gain variation (27 dB and 51 dB respectively) using 2 bit and 6 bit switch control. The 7th order gm-C Chebyshev LPF utilizes the modified Nauta OTA and gyrator to extend the 3 dB bandwidth to 400 MHz. Frequency synthesizer that cover both IR and MB-OFDM UWB is proposed. According to the controllable division ratio and reference frequency, the wanted channel can be selected.