JPS6448239A - Semiconductor laser driving circuit - Google Patents
Semiconductor laser driving circuitInfo
- Publication number
- JPS6448239A JPS6448239A JP62204656A JP20465687A JPS6448239A JP S6448239 A JPS6448239 A JP S6448239A JP 62204656 A JP62204656 A JP 62204656A JP 20465687 A JP20465687 A JP 20465687A JP S6448239 A JPS6448239 A JP S6448239A
- Authority
- JP
- Japan
- Prior art keywords
- power
- laser
- laser power
- control
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Optical Head (AREA)
- Semiconductor Lasers (AREA)
Abstract
PURPOSE:To highly-speedily and stably set laser power by operating a comparator when the laser power coincides with setting power, holding the control signal of a laser driving step and determining the laser power. CONSTITUTION:A means to change the control voltage of a current source 7 and to rising-control the laser power from low power to high power and a means to be put between the laser driving step and the control voltage and to hold the control voltage are provided. A means to compare the monitor voltage and the referring voltage of the setting power by the comparator and a control means to operate a hold circuit when the input of the comparator is coincident, to hold the control voltage and to set the laser power are provided. Thus, the laser power can be set highly-speedily and stably.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62204656A JPS6448239A (en) | 1987-08-18 | 1987-08-18 | Semiconductor laser driving circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62204656A JPS6448239A (en) | 1987-08-18 | 1987-08-18 | Semiconductor laser driving circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6448239A true JPS6448239A (en) | 1989-02-22 |
Family
ID=16494112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62204656A Pending JPS6448239A (en) | 1987-08-18 | 1987-08-18 | Semiconductor laser driving circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6448239A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005011390A (en) * | 2003-06-16 | 2005-01-13 | Samsung Electronics Co Ltd | Optical disk drive and laser output control method |
-
1987
- 1987-08-18 JP JP62204656A patent/JPS6448239A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005011390A (en) * | 2003-06-16 | 2005-01-13 | Samsung Electronics Co Ltd | Optical disk drive and laser output control method |
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