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This paper presents the design of a fully integrated ultra-wideband (UWB) pulse generator for the FCC 3.1-10.6 GHz band. This generator is reserved for medium rate applications and achieves unipolar pulses for OOK, PPM or PIM modulations. This UWB transmitter is based on the impulse response filter method which uses an edge combiner in order to excite an integrated bandpass filter. The circuit has been integrated in a ST-Microelectronics CMOS 0.13µm technology with 1.2V supply voltage and the die size is 0.54mm 2 . The pulse generator power consumption is 9pJ per pulse and achieves a peak to peak magnitude of 1.42V. The pulse is FCC compliant and the generator can be used with a rate up to 38Mbs -1 with a OOK modulation. Based on the FCC power spectrum density (PSD) limitation, a sizing method is also presented.