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:
Dec. 02, 2003
Filed:
Dec. 05, 2001
Yukihiko Tanizawa, Kariya, JP;
Denso Corporation, Kariya, JP;
Abstract
A pressure sensor is supplied with a supply voltage from a system control circuit having the function for changing the supply voltage. When the supply voltage is within a predetermined voltage range, the pressure sensor outputs the detection signal corresponding to the pressure to be measured and outputs a predetermined voltage which is irrespective of the pressure. More specifically, the system control circuit outputs the supply voltage at a value outside a predetermined voltage range in a diagnostic mode, that is, a value which is higher than the measuring mode, in order to turn on the transistors Q and Q to supply the predetermined voltage to the system control circuit to detect an error caused by increase in contact resistance between the pressure sensor and the system control circuit.