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:
Mar. 31, 1998
Filed:
Oct. 27, 1995
Mikiya Teraguchi, Kawasaki, JP;
Kiyokazu Okamoto, Kawasaki, JP;
Mitutoyo Corporation, Tokyo, JP;
Abstract
Signals S.sub.j and S.sub.j-1 that are deviate from each other by a phase value of 2 .pi./M are generated by combining two sinusoidal detection signals. A reference signal .DELTA.S is generated which represents a difference between the signals S.sub.j and S.sub.j-1. An up-pulse or a down-pulse is generated every time the signal S.sub.j or S.sub.j-1 varies by .DELTA.S/n. An n-ary reversible ring counter outputs a first count value and a carry or borrow pulse by counting the up-pulse and the down-pulse, and the first count value is used to control the operation of generating the up-pulse or down-pulse. An M-ary reversible ring counter outputs a second count value by counting the carry pulse or the borrow pulse, and the second count value is used to control the operation of generating the signals S.sub.j and S.sub.j-1.