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. 09, 2003
Filed:
Nov. 19, 2001
Satoru Kawamoto, Chita-gun, JP;
Denso Corporation, Aichi-Pref., JP;
Abstract
A piezoelectric actuator drive circuit has an abnormality detection circuit section. The abnormality detection circuit section is provided with a voltage detection circuit for detecting the voltage of a connection terminal on the non-ground side and a comparison circuit for generating a comparison signal to check whether a detected voltage is higher than a reference voltage or not based on the comparison result between the detected voltage and the reference voltage. If the detected voltage is lower than the reference voltage, it is determined that a cable is disconnected.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile