JPH0454022U - - Google Patents
Info
- Publication number
- JPH0454022U JPH0454022U JP9513190U JP9513190U JPH0454022U JP H0454022 U JPH0454022 U JP H0454022U JP 9513190 U JP9513190 U JP 9513190U JP 9513190 U JP9513190 U JP 9513190U JP H0454022 U JPH0454022 U JP H0454022U
- Authority
- JP
- Japan
- Prior art keywords
- error signal
- disk
- recording device
- laser beam
- controlling
- 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
- 230000001678 irradiating effect Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 2
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図は、この考案によるデイスク記録装置の
ＡＧＣ回路の一実施例を示す構成ブロツク図、第
２図は第１図の実施例におけるプログラマブルゲ
インアンプの一例を示す回路図、第３図は従来の
ＡＧＣ回路のＴＥ信号およびＦＥ信号を正規化す
るためのブロツク図である。
１……デイスク、２……スピンドルモータ、３
……光ピツクアツプ、４……光変調器、５……Ｉ
−Ｖ／ＡＭＰ回路、６……プログラマブルゲイン
アンプ、７……マイコン。
FIG. 1 is a configuration block diagram showing an embodiment of the AGC circuit of a disk recording device according to this invention, FIG. 2 is a circuit diagram showing an example of a programmable gain amplifier in the embodiment of FIG. 1, and FIG. 3 is a conventional circuit diagram. FIG. 2 is a block diagram for normalizing the TE signal and FE signal of the AGC circuit of FIG. 1...Disc, 2...Spindle motor, 3
...Optical pickup, 4...Optical modulator, 5...I
-V/AMP circuit, 6...programmable gain amplifier, 7...microcomputer.
Claims (1)
ーザ光を照射して記録し、前記デイスクからの反
射光から得られるトラツキングエラー信号とフオ
ーカスエラー信号の感度を一定化するデイスク記
録装置のＡＧＣ回路において、 前記レーザ光のパワーを制御するとともに前記
パワー制御に対応して前記トラツキングエラー信
号およびフオーカスエラー信号を増幅する増幅器
のゲインを制御する制御手段を備えて成ることを
特徴とするデイスク記録装置のＡＧＣ回路。[Claims for Utility Model Registration] Records are recorded by irradiating a laser beam modulated by written information onto a disk, and the sensitivity of a tracking error signal and a focus error signal obtained from the reflected light from the disk is made constant. An AGC circuit of a disk recording device, comprising control means for controlling the power of the laser beam and controlling the gain of an amplifier for amplifying the tracking error signal and the focus error signal in response to the power control. An AGC circuit for a disk recording device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9513190U JPH0454022U (en) | 1990-09-12 | 1990-09-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9513190U JPH0454022U (en) | 1990-09-12 | 1990-09-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0454022U true JPH0454022U (en) | 1992-05-08 |
Family
ID=31833617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9513190U Pending JPH0454022U (en) | 1990-09-12 | 1990-09-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0454022U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001080228A1 (en) * | 2000-04-14 | 2001-10-25 | Matsushita Electric Industrial Co., Ltd. | Optical disc drive |
-
1990
- 1990-09-12 JP JP9513190U patent/JPH0454022U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001080228A1 (en) * | 2000-04-14 | 2001-10-25 | Matsushita Electric Industrial Co., Ltd. | Optical disc drive |
| KR100451327B1 (en) * | 2000-04-14 | 2004-10-06 | 마츠시타 덴끼 산교 가부시키가이샤 | Optical disc drive |
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