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:
Mar. 18, 1997
Filed:
Sep. 20, 1995
Miyao Arakawa, Nagoya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
Hall elements detects magnetic signals of a rotational member which is secured to the crank shaft or the cam shaft of an engine and converts them to an alternating electric signal. The electric signal is amplified by a differential amplifier and applied to a peak-detecting-type wave-shaping circuit which generates a rotational position signal and a control signal. A reset signal generator generates an interrupting signal in response to the control signal and is applied to a NAND circuit which is connected between the wave shaping circuit and an output circuit. When a power switch is closed, the power source voltage sometimes drops to an extremely low value for providing the rotational position detecting signal. At this moment, the reset signal generator generates the interrupting signal and closes the NAND circuit so that erroneous signal of the rotational position detecting signal is prevented.