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:
Jan. 29, 2002
Filed:
Sep. 17, 1999
Ryo Nagai, Kawasaki, JP;
Shingo Kuroki, Kawasaki, JP;
Mitutoyo Corporation, Kawasaki, JP;
Abstract
An interpolation circuit generates two-phase square wave signals PA and PB from two-phase sinusoidal wave outputs ØA and ØB supplied from a photoelectric encoder. A gate signal generator slices a primary origin signal ØZ supplied from the photoelectric encoder with a predetermined reference level VRef to generate a gate signal Z. A first counter begins to count position pulses generated from the two-phase square wave signals PA and PB when the gate signal Z becomes active. A count value of the first counter is divided by two when the gate signal Z becomes non-active and the divided value is preset into a second counter. The second counter counts the position pulses generated from the two-phase square wave signals PA and PB. A comparator feeds an output origin signal PZ when a count value of the second counter reaches a predetermined offset value N.