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. 24, 2006
Filed:
Aug. 23, 2002
Katsunori Sato, Tokyo, JP;
Takeshi Yuwaki, Kagoshima, JP;
Katsunori Sato, Tokyo, JP;
Takeshi Yuwaki, Kagoshima, JP;
Sony Corporation, , JP;
Abstract
A semiconductor laser optical output control circuit able to precisely control an optical output of a semiconductor laser, provided with a peak value detection circuit-and a bottom value detection circuit-for detecting the output of a photo-diode PD, optical power setting voltage sources-and-for giving the setting value of the optical output of a semiconductor laser LD, a peak value detection circuit-and a bottom value detection circuit-for detecting the output of a switching circuitfor switching the setting value, error amplifiers-and-for comparing the detected outputs of the peak value detection circuit-and peak value detection circuit-and the bottom value detection circuit-and bottom value detection circuit-, and a switching circuitfor switching the comparison results of the error amplifiers-and-and supplying the same to a current amplifierin synchronization with the switching circuit