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. 01, 1984
Filed:
Jun. 03, 1982
Applicant:
Inventors:
Assignees:
Fujitsu Ten Limited, Kobe, JP;
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 92 ; 3072 / ; 364184 ;
Abstract
A clamping transistor is connected to a signal input terminal of a signal processing circuit, such as a microprocessor, which operates on the output voltage from a stabilized power source circuit. When the output voltage from the stabilized power source circuit is below a predetermined value at the time of turning ON or OFF a power source switch, the clamping transistor is held in the ON state, thereby preventing the application of an input signal of a level higher than the power source voltage of the signal processing circuit, to the signal input terminal of the signal processing circuit.