JPS62168118U - - Google Patents
Info
- Publication number
- JPS62168118U JPS62168118U JP5348386U JP5348386U JPS62168118U JP S62168118 U JPS62168118 U JP S62168118U JP 5348386 U JP5348386 U JP 5348386U JP 5348386 U JP5348386 U JP 5348386U JP S62168118 U JPS62168118 U JP S62168118U
- Authority
- JP
- Japan
- Prior art keywords
- component
- value
- drive circuit
- reference signal
- alternating 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
- 239000004065 semiconductor Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Optical Head (AREA)
Description
第１図は、本考案によるレーザードライブ回路
の実施例を示すブロツク図、第２図は、本考案に
よるレーザードライブ回路の出力信号の波形を示
す線図である。
１，２―バツフア増幅器、３―演算回路、４―
差回路、５―増幅器、６―重畳回路、７―レーザ
ーダイオード、８―ホトダイオード、１１，１５
―インバータ、１２，１３―スイツチ、Ｖ１―低
レベル基準電圧、Ｖｈ―振幅基準電圧。
FIG. 1 is a block diagram showing an embodiment of the laser drive circuit according to the present invention, and FIG. 2 is a diagram showing the waveform of an output signal of the laser drive circuit according to the present invention. 1, 2-Buffer amplifier, 3-Arithmetic circuit, 4-
Difference circuit, 5-amplifier, 6-superposition circuit, 7-laser diode, 8-photodiode, 11, 15
- inverter, 12, 13 - switch, V1 - low level reference voltage, Vh - amplitude reference voltage.
Claims (1)
記録すべき情報信号に応答するパルス信号の交流
成分によつて構成する半導体レーザードライブ回
路に於いて、 前記直流成分の値を可変可能に設定する直流駆
動手段と、 前記交流成分の振幅を前記直流成分の値の変化
率の２倍の変化率で可変する交流駆動手段とから
なることを特徴としたレーザードライブ回路。 (2) 前記直流駆動手段は第１の直流基準信号と
第２の直流基準信号の和信号に基づいて前記直流
成分の値を設定し、 前記交流駆動手段は、前記交流成分の振幅を前
記直流成分の値のうち前記第１の直流基準信号に
よつて設定される値の２倍に設定するようにした
ことを特徴とする実用新案登録請求の範囲第１項
記載のレーザードライブ回路。[Claims for Utility Model Registration] (1) In a semiconductor laser drive circuit in which the driving current of the semiconductor laser is composed of a DC component and an AC component of a pulse signal responsive to an information signal to be recorded, the DC component A laser drive circuit comprising: a direct current drive means that variably sets the value of the alternating current component; and an alternating current drive means that varies the amplitude of the alternating current component at a rate of change that is twice the rate of change of the value of the direct current component. . (2) The DC driving means sets the value of the DC component based on a sum signal of a first DC reference signal and a second DC reference signal, and the AC driving means sets the amplitude of the AC component to the DC component. 2. The laser drive circuit according to claim 1, wherein the component value is set to twice the value set by the first DC reference signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5348386U JPH079212Y2 (en) | 1986-04-11 | 1986-04-11 | Laser drive circuit |
| US07/036,619 US4796267A (en) | 1986-04-11 | 1987-04-10 | Laser control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5348386U JPH079212Y2 (en) | 1986-04-11 | 1986-04-11 | Laser drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62168118U true JPS62168118U (en) | 1987-10-24 |
| JPH079212Y2 JPH079212Y2 (en) | 1995-03-06 |
Family
ID=30879589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5348386U Expired - Lifetime JPH079212Y2 (en) | 1986-04-11 | 1986-04-11 | Laser drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH079212Y2 (en) |
-
1986
- 1986-04-11 JP JP5348386U patent/JPH079212Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH079212Y2 (en) | 1995-03-06 |
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