JPH0439814U - - Google Patents
Info
- Publication number
- JPH0439814U JPH0439814U JP8216690U JP8216690U JPH0439814U JP H0439814 U JPH0439814 U JP H0439814U JP 8216690 U JP8216690 U JP 8216690U JP 8216690 U JP8216690 U JP 8216690U JP H0439814 U JPH0439814 U JP H0439814U
- Authority
- JP
- Japan
- Prior art keywords
- pulse width
- optical disk
- conversion means
- signal
- output
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 238000003079 width control Methods 0.000 description 2
Landscapes
- Optical Recording Or Reproduction (AREA)
- Optical Head (AREA)
Description
第１図は本考案の一実施例の構成を示すブロツ
ク図。第２図は本考案の一実施例における変換回
路の構成を示すブロツク図。第３図は本考案の一
実施例における変換回路の作用の説明に供するタ
イミング図。第４図は本考案の一実施例の作用の
説明に供するタイミング図。第５図は本考案の一
実施例におけるパルス幅制御回路の作用の説明に
供する特性図。
１……変換回路、２および３……パルス幅電圧
変換回路、４……差動増幅回路、５……パルス幅
制御回路、６……光変調器、７……レーザダイオ
ード、１１および１２……比較器。
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of a conversion circuit in one embodiment of the present invention. FIG. 3 is a timing diagram for explaining the operation of the conversion circuit in one embodiment of the present invention. FIG. 4 is a timing chart for explaining the operation of one embodiment of the present invention. FIG. 5 is a characteristic diagram for explaining the operation of the pulse width control circuit in one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Conversion circuit, 2 and 3... Pulse width voltage conversion circuit, 4... Differential amplifier circuit, 5... Pulse width control circuit, 6... Optical modulator, 7... Laser diode, 11 and 12... ...Comparator.
Claims (1)
デイスクにピツトを形成させる光デイスク記録装
置において、光デイスクからの反射光を受けて形
成ピツト長に応じたレベルの信号に変換する第１
変換手段と、前記パルス幅変調信号のパルス幅に
応じたレベルの信号に変換する第２変換手段と、
第１変換手段からの出力信号レベルと第２変換手
段からの出力信号レベルとの差を検出する検出手
段と、検出手段の出力によつて光変調出力のパル
ス幅を制御する制御手段とを備えたことを特徴と
する光デイスク記録装置。 In an optical disk recording device that forms pits on an optical disk using an optically modulated output accompanying a pulse width modulation signal, there is a first optical disk that receives reflected light from the optical disk and converts it into a signal with a level corresponding to the length of the formed pit.
a conversion means; a second conversion means for converting the pulse width modulation signal into a signal having a level corresponding to the pulse width;
A detection means for detecting a difference between an output signal level from the first conversion means and an output signal level from the second conversion means, and a control means for controlling the pulse width of the optically modulated output based on the output of the detection means. An optical disc recording device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990082166U JP2546318Y2 (en) | 1990-08-03 | 1990-08-03 | Optical disk recording device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990082166U JP2546318Y2 (en) | 1990-08-03 | 1990-08-03 | Optical disk recording device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0439814U true JPH0439814U (en) | 1992-04-03 |
| JP2546318Y2 JP2546318Y2 (en) | 1997-08-27 |
Family
ID=31628732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990082166U Expired - Fee Related JP2546318Y2 (en) | 1990-08-03 | 1990-08-03 | Optical disk recording device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2546318Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0262726A (en) * | 1988-08-30 | 1990-03-02 | Hitachi Maxell Ltd | Optical disk device |
| JPH02122436A (en) * | 1988-10-31 | 1990-05-10 | Nec Corp | Optical recording and reproducing device |
-
1990
- 1990-08-03 JP JP1990082166U patent/JP2546318Y2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0262726A (en) * | 1988-08-30 | 1990-03-02 | Hitachi Maxell Ltd | Optical disk device |
| JPH02122436A (en) * | 1988-10-31 | 1990-05-10 | Nec Corp | Optical recording and reproducing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2546318Y2 (en) | 1997-08-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |