DocumentCode
1278245
Title
Optimum design for a thermally stable multifinger power transistor
Author
Liao, Chih-Hao ; Lee, Chien-Ping ; Wang, N.L. ; Lin, B.
Author_Institution
Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Volume
49
Issue
5
fYear
2002
fDate
5/1/2002 12:00:00 AM
Firstpage
902
Lastpage
908
Abstract
The thermal stability of multifinger bipolar transistors has been analyzed theoretically. Coupled equations are solved to study the onset of instability and its dependence on the distributions of ballasting resistors. Analytical expressions were derived for the emitter ballasting distribution for optimum stable operation. Compared to conventional methods with uniform ballasting, the optimized design can significantly increase the stable operating current of the transistor. An absolutely stable operating condition is also derived. At this condition, the device never becomes unstable
Keywords
power transistors; thermal stability; ballasting resistor; design optimisation; multifinger power transistor; thermal stability; Electronic ballasts; Equations; Fingers; Heterojunction bipolar transistors; Microwave transistors; Power transistors; Resistors; Thermal resistance; Thermal stability; Thin film transistors;
fLanguage
English
Journal_Title
Electron Devices, IEEE Transactions on
Publisher
ieee
ISSN
0018-9383
Type
jour
DOI
10.1109/16.998601
Filename
998601
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