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

Volume

42

Issue

14

fYear

2006

fDate

7/6/2006 12:00:00 AM

Firstpage

796

Lastpage

797

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;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:20060553

Filename

1661978