A Varying Pulse Width Second Order Derivative Gaussian Pulse Generator for UWB Transceivers in CMOS

A fully integrated, ultra low-power, varying pulse width second-order derivative Gaussian pulse generator designed and fabricated in a commercial 0.18mum CMOS technology is reported for 3-10GHz ultra wideband (UWB) transceivers. The second-order derivative Gaussian pulse generator circuit consists of three cascaded stages for generating square wave, Gaussian impulse, and second-order derivation sequentially. This CMOS second-order derivative Gaussian pulse generator can generate UWB pulses with adjustable pulse width ranging from 220 picoseconds to a few nanoseconds. Measured circuit performance achieves a very short pulse width of <1ns, an amplitude of 70mV and an ultra low power consumption of 2mW at 100MHz pulse repeating frequency. The pulse generator fully complies with FCC power mask.