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:
Apr. 16, 2002
Filed:
Mar. 26, 2001
Sony Corporation, Tokyo, JP;
Abstract
A rectified commercially available power source is supplied to one end of a primary coil T of a transformer T through a terminal TM . A capacitor C for rectifying is provided between the terminal TM and the ground. A switching device X is provided between the other end of the primary coil T and the ground. A power source obtained from a terminal TM is supplied as a power source for driving oscillators O and O , PWM circuits P and P , and a driving circuit D. The oscillator O supplies a signal based on a preset frequency f to the circuit P . In the circuit P , a switching signal having a predetermined duty ratio according to the supplied signal is supplied to the circuit D through a switching circuit SW . In the circuit D, the supplied switching signal is amplified and supplied to a control terminal of the switching device X.