Browsing by Author "Huan, Guo-Wei"

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High-speed divide-by-4/5 prescalers with merged and gates using gainp/gaas hbt and sige hbt technolmes
(2008-06-01)
Wei, Hung-Ju
;
Meng, Chinchun
;
Chang, YuWen
;
Lin, Yi-Chen
;
Huan, Guo-Wei
This paper demonstrates the divide-by-4/5 prescalers with merged AND gates in 2-mu m GaInP/GaAs heterojunction bipolar transistor (HBT) and 0.35-mu m SiGe HBT technologies. By biasing the HBT near the peak transit-time frequency (f(T)), the maxinnun operating frequency of a D-type flip-flop can be promoted. At the supply, voltage of 5 the GaInP/GaAs prescaler operates from 30 MHz to 5.2 GHz, and the SiGe prescaler has the higher-speed performance of 1-8 GHz at the cost of power consumption. (c) 2008 Wiley Periodicals, Inc.