Salehi - Tarbiat Modarres University
Nabavi - Tarbiat Modarres University

A high-rate programmable I/Q pulse mo&,ilator for ultra-wideband (UIlrB) transmitters in 5 8 10 6-GHz band is designedr .tsinga 0 I3-pm CMOS technologt. To spread the signal spectrum in this frequency band, the transmitter modulates an 8-GHz carrier frequency into signals with Gaussian envelop and [-ns time-width. By increasing the time-width to 2- ns, it is also possible to utilize the modulator at each of the two sub-bands of 6 8 GHz and 8 10 GHz. It is sholvn thqt with Gaussian erwelop lower side-lobes are achieved, compared to both monocycle and triangular pulses. The modulator is designed trsing high-speed low-power digital structures of extended tnte single phase clock (ETSPC) and current mode logic (CtvIL). The power connmptionfrom 1.2-V power ntpply is as low as 4.5 mWfor the rate of 2 Gchip/s at 8-GHz centre frequency.

BPSK, ETSPC, Flip-flop, Modulator, Pulse generator, Transmitter, Ultra-wideband