JPS6283219U - - Google Patents
Info
- Publication number
- JPS6283219U JPS6283219U JP17370285U JP17370285U JPS6283219U JP S6283219 U JPS6283219 U JP S6283219U JP 17370285 U JP17370285 U JP 17370285U JP 17370285 U JP17370285 U JP 17370285U JP S6283219 U JPS6283219 U JP S6283219U
- Authority
- JP
- Japan
- Prior art keywords
- focus coil
- optical pick
- semiconductor laser
- synchronization
- drive circuit
- 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
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 2
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Description
第１図は本考案に係るフオーカスコイル駆動回
路を示す図、第２図はその動作波形図である。
３はピツクアツプ、４はフオーカスコイル、Ｄ
１は半導体レーザ、Ｑ２はスイツチングトランジ
スタ（半導体レーザ駆動に同期してフオーカスコ
イルに電圧を印加する手段）。
FIG. 1 is a diagram showing a focus coil drive circuit according to the present invention, and FIG. 2 is an operating waveform diagram thereof. 3 is pick up, 4 is focus coil, D
1 is a semiconductor laser, and Q 2 is a switching transistor (means for applying voltage to the focus coil in synchronization with driving the semiconductor laser).
Claims (1)
る為のオフセツト電圧を、光学式ピツクアツプの
半導体レーザ駆動に同期してフオーカスコイルに
印加する手段を設けたことを特徴とする光学式ピ
ツクアツプ装置のフオーカスコイル駆動回路。 An optical pick-up device comprising means for applying an offset voltage to a focus coil in synchronization with driving a semiconductor laser of the optical pick-up to set a driven part including an objective lens at a neutral position. Focus coil drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17370285U JPS6283219U (en) | 1985-11-12 | 1985-11-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17370285U JPS6283219U (en) | 1985-11-12 | 1985-11-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6283219U true JPS6283219U (en) | 1987-05-27 |
Family
ID=31111412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17370285U Pending JPS6283219U (en) | 1985-11-12 | 1985-11-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6283219U (en) |
-
1985
- 1985-11-12 JP JP17370285U patent/JPS6283219U/ja active Pending
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