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:
Sep. 06, 2005
Filed:
Feb. 27, 2003
Applicant:
Shoichi Ishida, Obu, JP;
Inventor:
Shoichi Ishida, Obu, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R027/02 ; G01R031/02 ;
U.S. Cl.
CPC ...
Abstract
A sensor output processing device has an amplifier circuit for amplifying a sensor output signal of a sensor and a buffer circuit for limiting the amplified signal to a high limit level lower than a high side voltage of a power source or a low limit level higher than a low side voltage of the power source. This limited signal is normally produced as an output signal to an external circuit. When a self-diagnosis circuit determines an abnormality in the sensor or in the amplifier circuit and the buffer circuit, the output signal is fixed to a level higher than the high limit level or lower than the low limit level.