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:
Oct. 04, 1994
Filed:
Jan. 21, 1992
Jurgen Rupp, Erlangen, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
By rectifying, comparing and X-OR gating two signals (A,B) from a transmitting device (G) that are to be sinusoidal and have a corresponding rotational frequency, of the same amplitude, and ideally offset from one another electrically by 90.degree., a binary signal (RD) is generated that is indicative of whether a disturbance of the two signals (A,B) exists. A processing device (VE) determines if errors exist with respect to the amplitude, the offset or the phase relationship of the signals (A,B) by monitoring the mark-to-space ratio of the binary signal (RD) for its adherence to a ratio of 1:1, and generates a signal indicative of a disturbance when an error is determined to exist. Additionally, by dividing the binary signal (RD) via a 1:8 convertor (U) and monitoring that signal, the processing device can determine if a change in the rotational frequency of the two signals (A,B) of the transmitting device occurs.