Uwb Fast-hopping Carrier Frequency Generator

This paper discusses on the UWB carrier frequency generator that is capable of fast switching between different center frequencies. By using a switching network, the different frequencies from different local oscillators are switched within 4ns. A new topology of NMOS switch based on series-shunt configuration is proposed so that it is able to pass the signal from oscillators to output without transition spike. The performance of our carrier frequency generator is estimated through post layout simulation with a target technology of Silterra 0.18 μm CMOS at a supply voltage of 1.8 V. The post layout simulation results indicate that our carrier frequency generator is able to produce a signal with three center frequencies, i.e. 3432 MHz, 3960 MHz, and 4488 MHz at 400mV peak-to-peak swing within every 4ns. Zelo hiter generator nosilne frekvence Kjučne besede: širokopasovni, UWB, NMOS stikalo, oscilator, MBOA združenje, multi-band OFDM alliance Izvleček: V članku je predstavljen UWB generator nosilne frekvence, ki je zmožen hitrega preklapljanja med različnimi centralnimi frekvencami. Z uporabo stikalnega vezja uspemo v času 4ns preklopiti različne frekvence iz različnih lokalnih oscilatorjev. V prispevku predstavimo novo tipologijo NMOS stikala, ki omogoča prenos signala od oscilatorja do izhoda brez prehodne špice. Delovanje generatorja nosilne frekvence smo ovrednotili s simulacijami na osnovi parametrov 0.18 μm CMOS tehnologije Silterra pri napetosti 1.8 V. Rezultati nam pokažejo, da je generator sposoben proizvesti signal s tremi centralnimi frekvencami in sicer 3432 MHz, 3960 MHz in 4488 MHz vsake 4ns z vrhnjo napetostjo 400mV.