JPS61118127U - - Google Patents
Info
- Publication number
- JPS61118127U JPS61118127U JP20199984U JP20199984U JPS61118127U JP S61118127 U JPS61118127 U JP S61118127U JP 20199984 U JP20199984 U JP 20199984U JP 20199984 U JP20199984 U JP 20199984U JP S61118127 U JPS61118127 U JP S61118127U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- synchronization signal
- recording
- phase
- 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
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Landscapes
- Synchronizing For Television (AREA)
- Rotational Drive Of Disk (AREA)
Description
第１図は本考案になるサーボ回路の一実施例の
ブロツク系統図、第２図及び第３図は第１図に示
す本考案になるサーボ回路の一実施例の動作を説
明するための図、第４図は従来のサーボ回路のブ
ロツク系統図、第５図は位相比較回路１２の一例
のブロツク系統図、第６図乃至第１０図は第４図
に示す従来のサーボ回路の動作を説明するための
図である。
７……基準信号発生回路、１０……再生映像信
号処理回路、１１……水平同期信号分離回路、１
２……位相比較回路、１５……マルチバイブレー
タ回路（ＭＭ）、１６……サンプリングパルス信
号発生回路、１９……のこぎり波発生回路、２０
……スイツチ、２２……モータ駆動回路、２３…
…分周回路、Ｔｒ……トランジスタ、Ｃ……コン
デンサ、Ｒ……抵抗器。
FIG. 1 is a block system diagram of an embodiment of the servo circuit of the present invention, and FIGS. 2 and 3 are diagrams for explaining the operation of the embodiment of the servo circuit of the present invention shown in FIG. , FIG. 4 is a block system diagram of a conventional servo circuit, FIG. 5 is a block system diagram of an example of the phase comparator circuit 12, and FIGS. 6 to 10 explain the operation of the conventional servo circuit shown in FIG. 4. This is a diagram for 7...Reference signal generation circuit, 10...Reproduction video signal processing circuit, 11...Horizontal synchronization signal separation circuit, 1
2... Phase comparison circuit, 15... Multivibrator circuit (MM), 16... Sampling pulse signal generation circuit, 19... Sawtooth wave generation circuit, 20
...Switch, 22...Motor drive circuit, 23...
...Frequency divider circuit, Tr...transistor, C...capacitor, R...resistor.
Claims (1)
転駆動して映像情報信号の記録再生を行なう記録
再生装置において、 再生される前記映像情報信号より再生水平同期
信号を分離する水平同期信号分離回路と、 前記映像情報信号の水平走査周波数の２ｎ（ｎ
は自然数）倍の周波数の基準水平同期信号を出力
する基準信号発生回路と、 前記水平同期信号分離回路から出力される再生
水平同期信号と前記基準信号発生回路から出力さ
れる前記映像情報信号の水平走査周波数の２ｎ倍
の周波数の基準水平同期信号とを位相比較し、両
信号間の位相差に対応する位相誤差信号を出力す
る位相比較回路と、 前記位相比較回路から出力される位相誤差信号
に対応した駆動信号を前記記録再生素子または記
録媒体を回転駆動する前記モータに供給するモー
タ駆動回路とからなるサーボ回路。[Claims for Utility Model Registration] In a recording and reproducing device that records and reproduces a video information signal by rotationally driving a recording and reproducing element or a recording medium by a motor, there is provided a horizontal system that separates a reproduction horizontal synchronization signal from the video information signal to be reproduced. a synchronization signal separation circuit, and a horizontal scanning frequency of 2n (n
is a natural number); a reference signal generation circuit that outputs a reference horizontal synchronization signal with a frequency twice as high as that of the horizontal synchronization signal separation circuit; a phase comparison circuit that compares the phase with a reference horizontal synchronization signal having a frequency 2n times the scanning frequency and outputs a phase error signal corresponding to the phase difference between the two signals; and a phase error signal output from the phase comparison circuit. and a motor drive circuit that supplies a corresponding drive signal to the motor that rotationally drives the recording/reproducing element or the recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20199984U JPS61118127U (en) | 1984-12-28 | 1984-12-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20199984U JPS61118127U (en) | 1984-12-28 | 1984-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61118127U true JPS61118127U (en) | 1986-07-25 |
Family
ID=30764308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20199984U Pending JPS61118127U (en) | 1984-12-28 | 1984-12-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61118127U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0256768A (en) * | 1988-08-20 | 1990-02-26 | Pioneer Electron Corp | Time base control device |
-
1984
- 1984-12-28 JP JP20199984U patent/JPS61118127U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0256768A (en) * | 1988-08-20 | 1990-02-26 | Pioneer Electron Corp | Time base control device |
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