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:
Jun. 23, 2009
Filed:
Mar. 01, 2005
Kazuhiro Komatsu, Hyogo, JP;
Masahiko Fujimoto, Hyogo, JP;
Kouji Oonishi, Hyogo, JP;
Keisuke Kido, Hyogo, JP;
Junichi Sawada, Hyogo, JP;
Kazuhiro Komatsu, Hyogo, JP;
Masahiko Fujimoto, Hyogo, JP;
Kouji Oonishi, Hyogo, JP;
Keisuke Kido, Hyogo, JP;
Junichi Sawada, Hyogo, JP;
Fujitsu Ten Limited, Kobe, JP;
Abstract
A circuit for preventing corrosion of a contact, includes an input terminal, a signal line, a switch, an impedance element, and a comparator. The input terminal is to be connected to the contact, which is outside the circuit. The signal line is connected to the input terminal. The switch is connected to the signal line. The impedance element is connected to the signal line in parallel to the switch. An impedance of the switching section is smaller than that of the impedance element. The comparator compares a potential of the signal line with a predetermined potential. The switch is turned on based on a comparison result output from the comparator.