JPS6374723U - - Google Patents
Info
- Publication number
- JPS6374723U JPS6374723U JP16934386U JP16934386U JPS6374723U JP S6374723 U JPS6374723 U JP S6374723U JP 16934386 U JP16934386 U JP 16934386U JP 16934386 U JP16934386 U JP 16934386U JP S6374723 U JPS6374723 U JP S6374723U
- Authority
- JP
- Japan
- Prior art keywords
- laser diode
- transistor
- laser
- diode
- driving current
- 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
- 230000003287 optical effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Head (AREA)
Description
第１図はこの考案の光デイスク再生装置のレー
ザ駆動回路の実施例を示す回路図、第２図は従来
の光デイスク再生装置のレーザー駆動回路を示す
回路図である。
２……レーザーダイオード、４……駆動トラン
ジスタ、１０……増幅器、１２……ＤＣ―ＤＣコ
ンバータ。
FIG. 1 is a circuit diagram showing an embodiment of the laser drive circuit of the optical disc playback device of this invention, and FIG. 2 is a circuit diagram showing the laser drive circuit of a conventional optical disc playback device. 2...Laser diode, 4...Drive transistor, 10...Amplifier, 12...DC-DC converter.
Claims (1)
流を流し、レーザーダイオードが発生したレーザ
ー光を受光ダイオードで受け、その受光出力を前
記トランジスタのベースに増幅器を通して帰還し
てレーザーダイオードの駆動電流を制御する光デ
イスク再生装置のレーザー駆動回路において、 電源電圧を直流―直流変換手段を通して得た適
正な駆動電圧を前記トランジスタに加えて、レー
ザーダイオードに駆動電流を流す光デイスク再生
装置のレーザー駆動回路。[Claims for Utility Model Registration] A driving current is passed through the laser diode from a transistor, the laser light generated by the laser diode is received by a light receiving diode, and the received light output is fed back to the base of the transistor through an amplifier to generate a driving current for the laser diode. In the laser drive circuit of an optical disc playback device that controls a power supply voltage, an appropriate drive voltage obtained through a DC-DC conversion means is applied to the transistor, and a drive current flows through the laser diode. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986169343U JP2501405Y2 (en) | 1986-11-04 | 1986-11-04 | Laser drive circuit of optical disk reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986169343U JP2501405Y2 (en) | 1986-11-04 | 1986-11-04 | Laser drive circuit of optical disk reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6374723U true JPS6374723U (en) | 1988-05-18 |
| JP2501405Y2 JP2501405Y2 (en) | 1996-06-19 |
Family
ID=31103064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986169343U Expired - Lifetime JP2501405Y2 (en) | 1986-11-04 | 1986-11-04 | Laser drive circuit of optical disk reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2501405Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63121141A (en) * | 1986-11-07 | 1988-05-25 | Rohm Co Ltd | Laser driving circuit for optical disk reproducing device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5736366A (en) * | 1980-08-12 | 1982-02-27 | Sharp Corp | Optical signal output circuit |
-
1986
- 1986-11-04 JP JP1986169343U patent/JP2501405Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5736366A (en) * | 1980-08-12 | 1982-02-27 | Sharp Corp | Optical signal output circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63121141A (en) * | 1986-11-07 | 1988-05-25 | Rohm Co Ltd | Laser driving circuit for optical disk reproducing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2501405Y2 (en) | 1996-06-19 |