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:
Sep. 18, 2001
Filed:
Aug. 14, 2000
Dai Kato, Tokyo, JP;
Yokogawa Electric Corporation, Tokyo, JP;
Abstract
An improved switching power supply which saves power when under a small to no load, wherein a transformer is provided comprising a primary winding to which a DC current is supplied by turning ON and OFF a switching device and a secondary winding for supplying an output signal to the load; an ON state control circuit turns ON the switching device by using the output signal induced at the secondary winding; an OFF state control circuit turns OFF the switching device using a current control signal obtained from the output signal from the secondary winding and a reference signal; and wherein a delay circuit prolongs the time at which the switching device makes the OFF to ON transition.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile