JPH03106521U - - Google Patents
Info
- Publication number
- JPH03106521U JPH03106521U JP1542190U JP1542190U JPH03106521U JP H03106521 U JPH03106521 U JP H03106521U JP 1542190 U JP1542190 U JP 1542190U JP 1542190 U JP1542190 U JP 1542190U JP H03106521 U JPH03106521 U JP H03106521U
- Authority
- JP
- Japan
- Prior art keywords
- comparator
- drive circuit
- disk recording
- optical disk
- laser drive
- 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
- 230000003287 optical effect Effects 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Description
第１図はこの考案の実施例である光デイスク記
録再生装置の異常処理装置を示すブロツク図、第
２図は従来の光デイスク記録再生装置のレーザ駆
動回路およびトラツキングサーボ回路の例を示す
ブロツク図である。
１……レーザダイオード、２……レーザ駆動回
路、３……変調回路、４……光検出部、５……減
算器、６……位相補償および増幅回路、７……ト
ラツキングアクチユエータ、８……コンパレータ
、９……記憶装置、１０……時間情報発生装置。
FIG. 1 is a block diagram showing an abnormality processing device for an optical disk recording/reproducing apparatus which is an embodiment of this invention, and FIG. 2 is a block diagram showing an example of a laser drive circuit and a tracking servo circuit of a conventional optical disk recording/reproducing apparatus. It is a diagram. DESCRIPTION OF SYMBOLS 1...Laser diode, 2...Laser drive circuit, 3...Modulation circuit, 4...Photodetector, 5...Subtractor, 6...Phase compensation and amplification circuit, 7...Tracking actuator, 8...Comparator, 9...Storage device, 10...Time information generating device.
Claims (1)
し、このコンパレータの出力する信号により、レ
ーザ駆動回路の光パワーを低下させ、また、記憶
装置に時間情報を記憶させるように構成した光デ
イスク記録再生装置の異常処理装置。 Abnormality processing in an optical disk recording/reproducing device configured to input a tracking error signal to a comparator, reduce the optical power of a laser drive circuit based on the signal output from the comparator, and store time information in a storage device. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1542190U JPH03106521U (en) | 1990-02-19 | 1990-02-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1542190U JPH03106521U (en) | 1990-02-19 | 1990-02-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03106521U true JPH03106521U (en) | 1991-11-05 |
Family
ID=31518726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1542190U Pending JPH03106521U (en) | 1990-02-19 | 1990-02-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03106521U (en) |
-
1990
- 1990-02-19 JP JP1542190U patent/JPH03106521U/ja active Pending
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