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:
May. 20, 2008
Filed:
Jul. 24, 2003
Applicants:
Shigeo Kigo, Neyagawa, JP;
Hidehiko Shoji, Osaka, JP;
Jumpei Hashiguchi, Neyagawa, JP;
Inventors:
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 3/038 (2006.01); G09G 5/00 (2006.01); G09G 3/28 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a circuit driving a capacitive load Cp, current passed through a transistor Q, a diode Dand a recovering coil L is passed through lines L, L, and the inductance components of the lines Land L, and the drain-source capacitances of the transistors Qand Qgenerate LC resonance. Capacitors Cand Care connected in parallel to the drain-source regions of the transistors Qand Qto increase the total drain-source capacitance and reduce the resonance frequency, so that unwanted electromagnetic wave radiation in a frequency band affecting other electronic devices is suppressed.