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:
Jul. 11, 2000
Filed:
Aug. 28, 1995
Koichi Yamasaki, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A power source circuit of the switching stabilizing power source type, which is adaptable for portable television sets, video tape recorders, telephone sets, and the like. In the power source circuit, the oscillating operation of an oscillator circuit is synchronized with a reference clock signal of an external circuit. Because of this, the beat noise that is due to the fact that the noise unremovable by smoothing circuits is not synchronized with the reference clock signal can be removed. As a result, no deterioration of the external circuit characteristics, no erroneous operation of the power source circuit, and improvement of the reliability of the power source circuit are ensured. Further, since the oscillator circuit generates a triangle wave voltage, the triangle wave voltage contains a less noise by harmonic components than that of a saw-tooth wave voltage.