JPH01103019U - - Google Patents
Info
- Publication number
- JPH01103019U JPH01103019U JP19487187U JP19487187U JPH01103019U JP H01103019 U JPH01103019 U JP H01103019U JP 19487187 U JP19487187 U JP 19487187U JP 19487187 U JP19487187 U JP 19487187U JP H01103019 U JPH01103019 U JP H01103019U
- Authority
- JP
- Japan
- Prior art keywords
- low
- frequency compensation
- frequency
- compensation circuit
- focus servo
- 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
Landscapes
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Description
第１図は、本考案の一実施例を示すブロツク図
、第２図ａ，ｂは光デイスク装置の使用態様を示
す説明図、第３図は低域補償を付加した従来のフ
オーカスサーボアンプの回路図、第４図はフオー
カスサーボの特性図を示す。
図中、１０は高域補償回路、２０は低域補償回
路、３０は光学ヘツド、Ｃ，Ｒはローパスフイル
タ、Ｑはスイツチングトランジスタを示す。
Figure 1 is a block diagram showing an embodiment of the present invention, Figures 2a and b are explanatory diagrams showing how the optical disk device is used, and Figure 3 is a conventional focus servo amplifier with low frequency compensation. The circuit diagram of FIG. 4 shows a characteristic diagram of the focus servo. In the figure, 10 is a high frequency compensation circuit, 20 is a low frequency compensation circuit, 30 is an optical head, C and R are low pass filters, and Q is a switching transistor.
Claims (1)
、低域周波数の補償を行なう低域補償回路により
フオーカスサーボ回路を構成し、前記低域補償回
路を構成するローパスフイルタの容量性インピー
ダンス素子をフオーカスサーチ時には短絡される
ように構成したことを特徴とするフオーカスサー
ボ回路。 (2) 低域補償回路の信号系と高域補償回路の信
号系が並列回路とされ、低域補償のＤＣオフセツ
ト調整がアクチユエータ側に設けられていること
を特徴とする実用新案登録請求の範囲第(1)項に
記載のフオーカスサーボ回路。[Scope of Claim for Utility Model Registration] (1) A focus servo circuit is constituted by a high-frequency compensation circuit that compensates for high-frequency frequencies and a low-frequency compensation circuit that compensates for low-frequency frequencies; A focus servo circuit characterized in that a capacitive impedance element of a low-pass filter is configured to be short-circuited during a focus search. (2) The scope of the utility model registration claim, characterized in that the signal system of the low-frequency compensation circuit and the signal system of the high-frequency compensation circuit are parallel circuits, and the DC offset adjustment of the low-frequency compensation is provided on the actuator side. The focus servo circuit described in paragraph (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19487187U JPH0521698Y2 (en) | 1987-12-24 | 1987-12-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19487187U JPH0521698Y2 (en) | 1987-12-24 | 1987-12-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01103019U true JPH01103019U (en) | 1989-07-12 |
| JPH0521698Y2 JPH0521698Y2 (en) | 1993-06-03 |
Family
ID=31485576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19487187U Expired - Lifetime JPH0521698Y2 (en) | 1987-12-24 | 1987-12-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0521698Y2 (en) |
-
1987
- 1987-12-24 JP JP19487187U patent/JPH0521698Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0521698Y2 (en) | 1993-06-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH01103019U (en) | ||
| US3296539A (en) | Pulse-counter demodulator | |
| JPH024509Y2 (en) | ||
| JPS6032873U (en) | Color band amplifier circuit | |
| JPS5939299Y2 (en) | magnetic recording device | |
| KR910006316Y1 (en) | Secam system color signal handling circuit | |
| JPS63148306U (en) | ||
| JPS63185198U (en) | ||
| JPS62159096U (en) | ||
| JPS62101107U (en) | ||
| JPS6172708U (en) | ||
| JPS62117897U (en) | ||
| JPH03109422U (en) | ||
| JPS5860324U (en) | sound reproduction device | |
| JPS62186568U (en) | ||
| JPH02128214U (en) | ||
| JPH01132116U (en) | ||
| JPS6286719U (en) | ||
| JPS5933112U (en) | magnetic recording and reproducing device | |
| JPS62138302U (en) | ||
| JPH0455821U (en) | ||
| JPS5840974U (en) | Signal detection circuit for facsimile equipment | |
| JPH0244420U (en) | ||
| JPS6039256U (en) | Monolithic microwave IC | |
| JPS625792U (en) |