Characterization of layout dependent thermal coupling in SOI CMOS current mirrors

Author

Tenbroek, Bernard M. ; Redman-White, William ; Lee, Michael S L ; Bunyan, R. John T ; Uren, Michael J. ; Brunson, Kevin M.

Author_Institution

Dept. of Electron. & Comput. Sci., Southampton Univ., UK

Volume

43

Issue

12

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

2227

Lastpage

2232

Abstract

A current mirror is proposed as a suitable structure for the characterization of layout dependent thermal coupling between MOSFETs. Using current and voltage measurements, and compensating for series resistance effects, very small changes in local device temperature can be made visible. For the first time it is demonstrated that thermal coupling can be observed in a 2 μm SOI CMOS technology, with devices separated by as much as 20 μm. Measurements were verified by electro-thermal SPICE simulations, using a simple lumped model to express thermal coupling. The observations reinforce the need for accurate circuit level models, including self heating and thermal coupling effects, for analogue applications in VLSI SOI CMOS technologies

Keywords

CMOS analogue integrated circuits; VLSI; equivalent circuits; integrated circuit layout; integrated circuit measurement; integrated circuit modelling; silicon-on-insulator; thermal analysis; 2 micron; MOSFETs; SOI CMOS current mirrors; SOI CMOS technology; Si; VLSI technologies; analogue applications; characterization structure; current measurements; electro-thermal SPICE simulations; layout dependent thermal coupling; local device temperature changes; lumped model; self heating effects; series resistance effects compensation; voltage measurements; CMOS technology; Circuit simulation; Coupling circuits; Electrical resistance measurement; MOSFETs; Mirrors; SPICE; Semiconductor device modeling; Temperature; Voltage measurement;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.544395

Filename

544395