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:
Jul. 03, 1990
Filed:
Oct. 21, 1988
Gohji Uchikoshi, Higashimurayama, JP;
Nakamichi Corporation, Kodaira, JP;
Abstract
A two-phase encoder circuit for detecting a moving status of a moving article in accordance with first and second detecting signals which are input having a phase offset of 90 degrees and having repeated status of 'H' and 'L' according to the movement of said moving article, wherein the first detecting signal is taken in synchronization with a clock signal and an output received signal is sequentially output while a delay circuit having an input from at least the received signal outputs a delay signal more delayed than the received signal by less than one period of the clock signal, a pulse signal circuit having an input from at least the received signal outputs, a pulse signal in synchronization with an inversion of status of the received signal and the number of pulses of the pulse signal is counted while counted up or down according to the status of the delay signal with the counting operation being made when the second detecting signal has one status of ''H' and 'L'.