The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 1989
Filed:
Dec. 21, 1987
Applicant:
Inventors:
Flavio Villa, Milan, IT;
Giovanni Siepe, Novara, IT;
Assignee:
SGS Microelettronica S.p.A., Catania, IT;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; G05F / ; H01L / ;
U.S. Cl.
CPC ...
307254 ; 307255 ; 3073031 ; 307270 ; 307259 ; 307302 ; 323315 ; 323268 ; 323272 ; 357 44 ; 357 46 ; 357 35 ;
Abstract
This power transistor comprises a plurality of elementary transistors, also indicated as 'fingers', having their emitter terminals mutually connected and forming a common emitter terminal, collector terminals also mutually connected and forming a common collector terminal, and base terminals connected to at least one current source. Each elementary transistor is part of a circuit comprising a diode forming, together with the elementary transistor, a current mirror, so that the collector current passing through the elementary transistor is far less sensitive to the temperature gradients which originate inside the power transistor.