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. 04, 2001
Filed:
Mar. 10, 1999
Takahisa Uehira, Mobara, JP;
Futaba Denshi Kogyo Kabushiki Kaisha, Mobara, JP;
Abstract
In a linear scale, a reference point signal is outputted as a signal which is synchronized with an absolute value.,is a a/b phase signal generator forming a two-phase a/b signal of a moving signal by an absolute value which divided the inside of pitch when the a scale moves,,is a period counter,,is a subtracter,,is an up-down counter. An absolute value which divided the scale is preset to an internal counter,from a counter,at the time of, for example, “on” of a electric source, the counted value is changed by a feedback pulse FB forming a a/b phase output signal when the scale moves, a coincidence pulse Pr is outputted from a count comparator,when the internal counter,comes to a set value Q within a specific,(one) pitch, and a reference pulse P,showing a position of an origin Z can be obtained synchronously with the absolute value interpolating the inside of pitch by extracting the coincidence pulse Pr at a reference position at which an origin detecting signal S,is detected.