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:
Nov. 06, 2007
Filed:
Feb. 07, 2006
Takao Tsuruhara, Oobu, JP;
Takao Tsuruhara, Oobu, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
The capacitance type physical quantity sensor has a sensing part including a capacitor element generating a capacitance signal representing a magnitude of a physical quantity to be sensed, and a sensor circuit including a charge amplifier converting the capacitance signal into a voltage signal. The charge amplifier includes an operational amplifier applied with the capacitance signal at an inverting input terminal thereof and applied with a reference voltage at a non-inverting input terminal thereof, a first capacitor connected between the inverting input terminal and an output terminal of the operational amplifier, a feedback resistor connected in parallel to the first capacitor, and a switch connected in parallel to the first capacitor and configured to be closed to make a short circuit between the inverting input terminal and the output terminal upon receiving a refresh signal supplied from outside.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile