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:
Oct. 22, 1996
Filed:
Jul. 28, 1994
Applicant:
Inventor:
Kenneth T Small, Cupertino, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363132 ; 363 98 ;
Abstract
A solid-state power converter using a transistor bridge structure and symmetry modulation to improve output stability when driving resonant loads. The power converter utilize a direct coupled driver for each upper switching transistor, permitting a wider control range than a transformer. In addition, various circuits to protect the load and the converter include: power limiting, surge reduction, thermal limiting, input over-voltage protection, output over-voltage shutdown, ground-fault shutdown, re-start delay, soft-start, and low-current off-on switch.