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:
Apr. 07, 1992
Filed:
Aug. 03, 1990
August Petersen, Henstedt-Ulzburg, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
An adaptive revolution-measuring apparatus which includes a magnetic revolution sensor and an apparatus for comparing and evaluating the sensor signal of the revolution sensor to generate a digital output signal (U.sub.A) corresponding thereto, which despite large offset voltage tolerances and shifts uniquely identifies and evaluates the periodic sensor signal. The measuring apparatus contains a window comparator (17) with a controllable window as the apparatus for comparing which via at least one logic switching element (20, 21) drives a flip-flop (25) to produce the output signal (U.sub.A). Further apparatus are provided downstream of the window comparator which continuously generate corresponding reference voltages (U.sub.R1, U.sub.R2) for the window comparator as a function of the raised or lowered values of the sensor signal.