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. 22, 2001
Filed:
Apr. 15, 1999
Applicant:
Inventors:
Kenichiro Maeda, Kanagawa, JP;
Daisuke Yoshida, Hatano, JP;
Koichi Kato, Hiratsuka, JP;
Yasushi Kawaji, Yokohama, JP;
Assignee:
Komatsu Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H 3/500 ;
U.S. Cl.
CPC ...
H01H 3/500 ;
Abstract
In a circuit that controls the mean current flowing to a load,by turning ON or OFF in predetermined ratio the power source voltage VB applied to load,using for this purpose a switch means Sw,a capacitor C,is charged with the potential difference generated between the load,and power source whilst switch means Sw,is OFF, and a voltage for control purposes which exceeds power source voltage VB is applied to drive circuit,using this stored voltage. A high side switch can thereby be implemented using N type semiconductor elements in a simple circuit.