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. 20, 2007
Filed:
Mar. 31, 2005
Nobuhiro Fujimori, Ayabe, JP;
Satoshi Motouji, Kyoto, JP;
Hidetomo Ohtsuki, Fukuchiyama, JP;
Omron Corporation, Kyoto-Shi, JP;
Abstract
An operation sectionis provided to a proximity sensor including: a detection section having an oscillation circuitand an amplification sectionhaving a function detecting a metal body using an oscillation amplitude of the oscillation circuitIn a set mode, when an operation to set an adjustment value for a sensitivity adjustment (a sensitivity adjustment value) is conducted in an operation sectionCPUgenerates a sensitivity adjustment signal in digital quantity indicating the sensitivity adjustment value and outputs the signal to a D/A converterThe sensitivity adjustment signal digital-to-analog converted by the D/A converteris given to a feedback circuitthrough a voltage adjustment circuitSince the feedback circuitis designed so as to change a feedback current quantity according to an applied voltage, a current with a magnitude matching a value the sensitivity adjustment signal is fed back to a resonance circuitto thereby control an oscillation amplitude.