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:
Aug. 22, 1989
Filed:
Aug. 24, 1988
Applicant:
Inventors:
Jenoe Tihanyi, Muenchen, DE;
Roland Weber, Muenchen, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; G02B / ;
U.S. Cl.
CPC ...
307311 ; 307270 ; 307570 ; 307565 ; 307549 ; 250551 ;
Abstract
A power FET is driven by a photodiode chain across a switch, which has two FETs (5, 6) arranged in series. Upon illumination the first FET (5) is driven to be conducting, which permits current to flow from a capacitor (C) connected to a fixed voltage into the gate-source capacitor (C.sub.GS) of the power FET (1) and to switch it on rapidly. Upon cessation of the illumination, the first FET (5) is blocked while the second FET (6) is driven to be conducting. Hence, the C.sub.GS of the power FET is discharged and the power FET is blocked.