JPH0462518U - - Google Patents
Info
- Publication number
- JPH0462518U JPH0462518U JP10661190U JP10661190U JPH0462518U JP H0462518 U JPH0462518 U JP H0462518U JP 10661190 U JP10661190 U JP 10661190U JP 10661190 U JP10661190 U JP 10661190U JP H0462518 U JPH0462518 U JP H0462518U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- converter
- current source
- controlled current
- control unit
- 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)
Description
第１図は本考案の光パワーコントロール回路の
構成ブロツク図、第２図は従来の光パワーコント
ロール回路の構成ブロツク図である。
２０……制御部、３０……ＡＤ変換器、３１…
…メモリ、３２……ＤＡ変換器、３５……ＣＰＵ
。
FIG. 1 is a block diagram of the configuration of an optical power control circuit according to the present invention, and FIG. 2 is a block diagram of a conventional optical power control circuit. 20...control unit, 30...AD converter, 31...
...Memory, 32...DA converter, 35...CPU
.
Claims (1)
を測定し、光ビームの出力が設定パワーになるよ
うに電圧制御型電流源の電圧を制御する制御部を
有する光パワーコントロール回路であつて、 前記制御部が前記電圧制御型電流源に印加した
電圧値をＡＤ変換するＡＤ変換器と、 このＡＤ変換器でＡＤ変換されたデータを記憶
するメモリと、 このメモリに記憶されたデータをＤＡ変換して
前記電圧制御型電流源に出力するＤＡ変換器と、 このＤＡ変換器と前記制御部との電圧出力を前
記電圧制御型電流源に切換えて与えるスイツチと
、 を設け、前記制御部が定常状態で印加した電圧を
メモリで記憶しておき、書き込みの最初の出力と
してＤＡ変換器から電圧制御型電流源に出力する
ことを特徴とした光パワーコントロール回路。[Claims for Utility Model Registration] Optical power control having a control unit that measures the power of a light beam for writing information on an optical disk and controls the voltage of a voltage-controlled current source so that the output of the light beam becomes the set power. The circuit includes: an AD converter that AD converts a voltage value applied to the voltage-controlled current source by the control unit; a memory that stores data AD-converted by the AD converter; a DA converter that converts the data into DA converter and outputs the data to the voltage-controlled current source; and a switch that switches the voltage output of the DA converter and the control unit to the voltage-controlled current source, An optical power control circuit characterized in that the voltage applied by the control section in a steady state is stored in a memory and outputted from a DA converter to a voltage-controlled current source as the first output of writing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10661190U JPH0462518U (en) | 1990-10-09 | 1990-10-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10661190U JPH0462518U (en) | 1990-10-09 | 1990-10-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0462518U true JPH0462518U (en) | 1992-05-28 |
Family
ID=31852765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10661190U Pending JPH0462518U (en) | 1990-10-09 | 1990-10-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0462518U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007265488A (en) * | 2006-03-28 | 2007-10-11 | Nec Electronics Corp | Optical disk device and circuit and method for controlling laser power |
-
1990
- 1990-10-09 JP JP10661190U patent/JPH0462518U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007265488A (en) * | 2006-03-28 | 2007-10-11 | Nec Electronics Corp | Optical disk device and circuit and method for controlling laser power |
| US7859979B2 (en) | 2006-03-28 | 2010-12-28 | Renesas Electronics Corporation | Optical disk apparatus, laser power controller, and laser power control method |
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