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. 04, 2001
Filed:
Jan. 21, 1999
Koji Nakahira, Kyoto, JP;
Ryuji Okamura, Nagaokakyo, JP;
Ryota Tani, Otokuni-gun, JP;
Akio Nishida, Kyoto, JP;
Abstract
A self-oscillation switching power supply apparatus of the ringing choke converter type comprises a transformer T including a primary winding N,, a secondary winding N,, and a feedback winding N,; a switching transistor Q,which oscillates in a self-oscillating fashion in response to a feedback signal from the feedback winding N,thereby turning on and off the current flowing through the primary winding; a rectifying and smoothing circuit connected to the secondary winding; an oscillation frequency control circuit including a control transistor Q,for controlling a control signal input to the switching transistor Q,thereby controlling the control transistor Q,so as to extend the off-time in the self-oscillation period of the switching transistor Q,; and an oscillation frequency control disabling circuit for disabling the control of the control transistor Q,in accordance with a remote signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile