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. 02, 1990
Filed:
Sep. 06, 1988
Toshiharu Kuwaoka, Yokohama, JP;
Abstract
A photo coupling device optically connects a transmission unit and a reception unit. The photo coupling device includes a photo emitter and a photo receptor connected via an optical path. The photo emitter is disposed in the transmission unit. The photo emitter is supplied with a transmission digital data signal and generates an optical signal corresponding to the transmission digital data signal. The photo receptor is disposed in the reception unit and receives the optical signal. The photo receptor is switched by short electrical pulses. The photo receptor samples the optical signal and converts the sampled optical signal into a corresponding digital signal at moments of occurrence of the short electrical pulses. A sync signal is transmitted from the transmission unit to the reception unit. The sync signal has a fixed timing relationship with the transmission digital data signal. The short electrical pulses are generated on the basis of the sync signal and are synchronized with the transmission digital data signal.