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:
Mar. 16, 1999
Filed:
Jul. 03, 1997
Applicant:
Inventor:
Garry N Link, Aloha, OR (US);
Assignee:
Maxim Integrated Products, Inc., Sunnyvale, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 38 ; 372 34 ;
Abstract
A semiconductor laser driver circuit that provides single supply operation over a wide supply voltage range (e.g., 3 V to 5.5 V), is capable of high speed data transmission, and is programmable over a wide laser modulation current range (such as 5 mA to 60 mA). The circuit includes temperature sensitive circuits to adjust for changes in Vbe over the operating temperature range, and to adjust a bias current to maintain transistor g.sub.m in the presence of temperature changes. Also included is an adaptive drive feature to accommodate different laser drive currents. Details of these and other features are disclosed.