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:
Nov. 15, 1983
Filed:
Jul. 15, 1981
Applicant:
Inventor:
Henk Houkes, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315248 ; 315276 ; 315283 ; 315287 ;
Abstract
A frequency converter for supplying an electrodeless discharge lamp comprises a VMOS controlled semiconductor switching element and a parallel circuit including an electric coil coupled to a discharge path of the lamp. A control circuit of the switching element includes a transformer which, in combination with two Zener diodes, results in a low-loss control circuit for the VMOS and, hence, an increased system efficiency.