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:
Mar. 05, 2002
Filed:
Jun. 28, 2000
Applicant:
Inventor:
Hidehiro Akahane, Tatsuno-machi, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/42 ; H01H 9/54 ;
U.S. Cl.
CPC ...
H02H 3/42 ; H01H 9/54 ;
Abstract
A control circuit of a switching state detecting device for a switch controls the value of a resistive element connected between one end of the switch (SW), of which the switching state is to be detected, and the power source or ground line, so the range of operating voltage can be widened, the current flowing at the time of switching on is suppressed so that power consumption of an electronic apparatus provided with the switching state detecting device for a switch is reduced, and improvement in detection precision can be made by causing the detection current to flow in a sure manner.