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. 05, 2006
Filed:
Feb. 20, 2004
Dennis Joseph Denen, Westerville, OH (US);
Gary Edwin Myers, Westerville, OH (US);
Charles W. Groezinger, Columbus, OH (US);
John J. Knittle, Westerville, OH (US);
Dennis Joseph Denen, Westerville, OH (US);
Gary Edwin Myers, Westerville, OH (US);
Charles W. Groezinger, Columbus, OH (US);
John J. Knittle, Westerville, OH (US);
Georgia-Pacific Corporation, Atlanta, GA (US);
Abstract
A proximity detection circuit. An oscillator circuit is adapted to provide charge to an antenna. An operational amplifier, operated as a unity gain follower, receives an antenna signal which is representative of an external capacitive load on the antenna. A detector circuit receives the antenna signal via the operational amplifier and outputs a detection signal in response to changes in the antenna signal. A comparator receives the detection signal and is adapted to generate an output signal in response thereto.