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:
May. 22, 2001
Filed:
Oct. 29, 1998
Applicant:
Inventor:
Dubravko I. Babic, Palo Alto, CA (US);
Assignee:
Agilent Technologies, Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/026 ; H01L 3/300 ;
U.S. Cl.
CPC ...
H01S 5/026 ; H01L 3/300 ;
Abstract
A light emitting device and heterojunction phototransistor combination having a structure where a p-type material terminal of a laser is common with an emitter of a PNP heterojunction phototransistor. This configuration results in a light emitting device and heterojunction phototransistor structure that has a drastically reduced bias voltage requirement and that allows independent biasing of the laser and the heterojunction phototransistor.