Title:
DC COUPLING TYPE LASER DRIVE CIRCUIT AND DRIVE METHOD FOR SEMICONDUCTOR LASER ELEMENT
Document Type and Number:
WIPO Patent Application WO/2013/111381
Kind Code:
A1
Abstract:
A DC coupling type laser drive circuit (1) is provided with: a voltage dropper (14) inserted between a power supply and a pre-driver (12); and a voltage drop control unit (16) that controls the voltage drop in the voltage dropper (14) according to the output voltage of the pre-driver (12).
Inventors:
KUBO TATSUO
Application Number:
PCT/JP2012/074439
Publication Date:
August 01, 2013
Filing Date:
September 24, 2012
Export Citation:
Assignee:
FUJIKURA LTD (JP)
International Classes:
H01S5/042
Foreign References:
| JPH10145221A | 1998-05-29 | |||
| JP2011142173A | 2011-07-21 | |||
| JPH05218543A | 1993-08-27 | |||
| JP2000269590A | 2000-09-29 | |||
| US6765942B2 | 2004-07-20 | |||
| JP2010267799A | 2010-11-25 |
Other References:
See also references of EP 2639899A4
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
Patent business corporation Hara [Kenzo] international patent firm (JP)
Patent business corporation Hara [Kenzo] international patent firm (JP)
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Claims:
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