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:
Feb. 16, 2010
Filed:
Dec. 03, 2007
Igor Kurkovskiy, Twinsburg, OH (US);
Daniel Royer, North Canton, OH (US);
Hermann Wieth, Chagrin Falls, OH (US);
James William Clingersmith, Chesterland, OH (US);
Igor Kurkovskiy, Twinsburg, OH (US);
Daniel Royer, North Canton, OH (US);
Hermann Wieth, Chagrin Falls, OH (US);
James William Clingersmith, Chesterland, OH (US);
Pepperl +Fuchs, Inc., Twinsburg, OH (US);
Abstract
Systems and methods are provided for sensing or measuring capacitive or inductive reactance or changes in reactance in which the sensed reactance is coupled with a known resistance in a sensor circuit and a start signal is provided to the sensor circuit, and a programmable delay line is used to generate a programmable delay signal. The outputs of the programmable delay and the sensor circuits are compared to ascertain which transitions first, and the programmable delay value is adjusted in successive approximation fashion to identify a programmable delay that best represents the delay time of the sensor circuit from which the sensed reactance value can be determined.