JPH0320029U - - Google Patents
Info
- Publication number
- JPH0320029U JPH0320029U JP7699389U JP7699389U JPH0320029U JP H0320029 U JPH0320029 U JP H0320029U JP 7699389 U JP7699389 U JP 7699389U JP 7699389 U JP7699389 U JP 7699389U JP H0320029 U JPH0320029 U JP H0320029U
- Authority
- JP
- Japan
- Prior art keywords
- servo circuit
- tracking servo
- gain
- detected
- tracking
- 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
Landscapes
- Optical Recording Or Reproduction (AREA)
Description
第１図はこの考案の一実施例の構成を示す回路
図。第２図は従来例の構成を示す回路図。
Ａ１……作動増幅器、Ａ２……位相補償増幅器
、Ａ３……定電流増幅器、ＶＲ１……可変抵抗器
、Ｔ……トラツキングアクチエータ、Ｌ……ロー
パスフイルタ、Ｐ……ピークホールド回路、Ｑ１
……トランジスタ、Ｒ３……抵抗。
FIG. 1 is a circuit diagram showing the configuration of an embodiment of this invention. FIG. 2 is a circuit diagram showing the configuration of a conventional example. A 1 ... operational amplifier, A 2 ... phase compensation amplifier, A 3 ... constant current amplifier, VR 1 ... variable resistor, T ... tracking actuator, L ... low pass filter, P ... peak hold circuit, Q 1
...transistor, R3 ...resistance.
Claims (1)
において、トラツキングアクチユエータに流れる
低域周波数の電流レベルを検出し、検出した電流
レベルが所定閾値を超えたときトラツキングサー
ボ回路のゲインを増加させるようゲイン調整手段
を切替えることを特徴とするトラツキングサーボ
回路。 In the tracking servo circuit of an optical disc player, the level of low-frequency current flowing through the tracking actuator is detected, and when the detected current level exceeds a predetermined threshold, the gain is adjusted to increase the gain of the tracking servo circuit. A tracking servo circuit characterized by switching means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7699389U JPH0320029U (en) | 1989-07-01 | 1989-07-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7699389U JPH0320029U (en) | 1989-07-01 | 1989-07-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0320029U true JPH0320029U (en) | 1991-02-27 |
Family
ID=31618960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7699389U Pending JPH0320029U (en) | 1989-07-01 | 1989-07-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0320029U (en) |
-
1989
- 1989-07-01 JP JP7699389U patent/JPH0320029U/ja active Pending
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