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.

Date of Patent:
Oct. 20, 1998

Filed:

Jan. 02, 1997
Applicant:
Inventors:

Masanori Kinugasa, Yokohama, JP;

Hiroshi Shigehara, Oita, JP;

Akira Takiba, Kawasaki, JP;

Assignee:

Kabushiki Kaisha Toshiba, Kawasaki, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
327143 ; 327142 ; 327198 ;
Abstract

An auto-clear circuit which has a switch device connected between a power supply voltage terminal and first and second nodes, and a potential division device, connected between the first node and a ground terminal, for outputting a first potential obtained by dividing a potential of the first node. Also included is a charge/discharge device, connected between the second node and a ground terminal, for charging or discharging the second node on the basis of the first potential output from the potential division device, and a latch device for holding a potential of the second node to output a signal from an output terminal, and supplying the signal to the switch device to control an opening/closing operation.


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