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. 11, 1983
Filed:
Dec. 12, 1980
Hiroshi Kanbe, Tanashi, JP;
Elmer H Hara, Tokyo, JP;
Nippon Telegraph & Telephone Public Corp., Tokyo, JP;
Abstract
In an optoelectronic switch, a photodiode is used as an optical-to-electrical converter in which a first semiconductor including a p-n junction is combined with a second semiconductor having a narrower energy band gap than the first semiconductor to form a heterojunction. When supplied with a light signal modulated by an electrical signal, the photodiode becomes ON or OFF depending upon the magnitude of a reverse bias voltage applied to said photodiode. A source for applying the bias voltage to the photodiode comprises two voltage sources of the same polarity or a single voltage source. The optoelectronic switch, has a high isolation ratio and broad transmission bandwidth, consumes little electrical power and produces low cross-talk levels when used in switching arrays.