Title :
SSH and SHH GaInP/GaAs HBT divide-by-3 prescalers with true 50% duty cycle
Author :
Tseng, S.C. ; Meng, C.C. ; Chen, W.Y.
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
7/6/2006 12:00:00 AM
Abstract :
Two 50% duty cycle divide-by-3 prescalers - sample-sample-hold (SSH) and sample-hold-hold (SHH) prescalers - in the 2 μm GaInP/GaAs heterojunction bipolar transistor (HBT) technology are realised. Current switchable emitter couple logic D flip-flops are employed to form both prescalers. The proposed SHH prescaler functions up to 2.6 GHz while the SSH prescaler operates from DC to 1.75 GHz. The maximum operating frequency of the SHH prescaler is enhanced about 50% compared with that of the SSH prescaler owing to better signal synchronisation.
Keywords :
III-V semiconductors; bipolar logic circuits; emitter-coupled logic; flip-flops; frequency dividers; gallium arsenide; gallium compounds; heterojunction bipolar transistors; indium compounds; prescalers; sample and hold circuits; 0 to 2.6 GHz; 50% duty cycle; GaInP-GaAs; HBT; SHH prescaler; SSH prescaler; current switchable emitter couple logic D flip-flops; divide-by-3 prescalers; frequency divider; heterojunction bipolar transistor; sample-hold-hold presenters; sample-sample-hold presenters; signal synchronisation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20060553
