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:
Dec. 31, 2002
Filed:
Mar. 23, 2001
Toyoki Taguchi, Yokohama, JP;
Makoto Morimoto, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
There is provided an input circuit including a current/current conversion circuit and a current change-over circuit for converting an input control current into an inside control current; a control amplification circuit for amplifying a voltage corresponding to a difference current between an output current from the input circuit and a monitor current which is fed back from the photodetector for detecting a light output of the LD; an output circuit which is controlled with an output from the control amplification circuit; an offset compensation circuit for compensating for the offset generated between the input of the current/current conversion circuit and the output of the control amplification circuit, so that the offset is detected to compensate for the offset in the state in which the output of the control amplification circuit is cut off with the switch.