Ultra-širokopojasni impulsni generator u CMOS tehnologiji

Abstract

Impulsni generator predstavlja jedan od najvažnijih delova bežičnog primopredajnika. Pored toga što treba da generiše signal čiji spektar zadovoljava odgovarajuću spektralnu masku, generator treba da bude što jednostavniji, zauzima malu površinu i ima malu potrošnju. Naučni doprinos ove doktorske disertacije predstavlja sedam novih konfiguracija ultra-širokopojasnih impulsnih generatora projektovanih u CMOS tehnologiji, od kojih su tri fabrikovane u 0,18 μm UMC CMOS procesu. Prvi dizajn je zasnovan na principu kombinovanja kratkotrajnih impulsa, sledeća tri sadrže ring oscilator, naredna dva impulsna generatora koriste princip filtriranja, dok poslednje novo rešenje obezbeđuje BPSK kodovanje korišćenjem dva ring oscilatora.

Pulse generator is one of the most important parts of a wireless transceiver. Besides generating a signal which spectrum has to satisfy corresponding spectral mask, the pulse generator should have topology as simple as possible, consume low power and occupy low die-area. Scientific contribution of this dissertation are seven novel IR-UWB pulse generator architectures designed in CMOS technology of which three are fabricated in 0.18 μm UMC CMOS process. The first design is based on combining very short pulses, the next three contain a ring oscillator topology followed by two pulse generators that use the filtering approach, while the last new solution enables BPSK modulation by employing two ring oscillator topologies.