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:
Dec. 28, 1999
Filed:
Mar. 22, 1999
Tetushi Otake, Tokyo, JP;
Toko, Inc., Tokyo, JP;
Abstract
A self-oscillation-resonance type power supply circuit having a stabilizer for output voltages or output currents. A transformer and two transistors (a first transistor and a second transistor) are used to form a push-pull type self-oscillation-resonance type power supply circuit. Feedback signals that change according to resonant voltages are inputted to individual gates of the first transistor and the second transistor, a controller for generating error signals corresponding to the difference between a voltage signal and a reference signal is included in the circuit, and the error signals are fed to the individual gates of the first transistor and the second transistor, whereby conduction timing of the individual transistors is changed to vary the self-oscillation frequency. When the self-oscillation frequency changes,, the amount of energy to be transferred form a resonant circuit formed by a resonance capacitor circuit and a first finding of the transformer to a second winding of the transformer so as to control output voltages.