JPS5920456U - magnetic recording and reproducing device - Google Patents
magnetic recording and reproducing deviceInfo
- Publication number
- JPS5920456U JPS5920456U JP11487882U JP11487882U JPS5920456U JP S5920456 U JPS5920456 U JP S5920456U JP 11487882 U JP11487882 U JP 11487882U JP 11487882 U JP11487882 U JP 11487882U JP S5920456 U JPS5920456 U JP S5920456U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- reproducing device
- magnetic recording
- tape
- even number
- 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
- Control Of Velocity Or Acceleration (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図、第２図は従来の磁気ヘッドの回転位相及び回転
速度を検出する信号を得を装置を示す図、−第３図は本
考案になるＶＴＲの一実施例を示す図、第４図は第３図
の装置により得られる検出信号よりモータの回転速度及
び回転位相を制御するための信号を得る回路図であり、
第５図は第４図に示す回路の各部波形を示すタイミング
チャートである。
１４．１５・・・ＰＧコイル、１６．１７・・・磁気ヘ
ッド、１８・・・回転ディスク、２０． ２１． ２２
゜２３．２４．２５・・・ヤグネット、３１．３３・・
・ＰＣ増幅器、３４．３５・・・ＲＳフリップフロップ
回路、３６・・・位相比較器、３Ｂ、 ３９． ４０
． ４１・・・反転器、４２． ４３． ４４・・・Ｎ
ＡＮＤ回路、４６・・・Ｄフリップフロップ。1 and 2 are diagrams showing a conventional apparatus for obtaining signals for detecting the rotational phase and rotational speed of a magnetic head. The figure is a circuit diagram for obtaining signals for controlling the rotational speed and rotational phase of the motor from the detection signals obtained by the apparatus of FIG.
FIG. 5 is a timing chart showing waveforms of various parts of the circuit shown in FIG. 14.15...PG coil, 16.17...Magnetic head, 18...Rotating disk, 20. 21. 22
゜23.24.25...Yagnet, 31.33...
- PC amplifier, 34.35...RS flip-flop circuit, 36...phase comparator, 3B, 39. 40
．． 41... Inverter, 42. 43. 44...N
AND circuit, 46...D flip-flop.
Claims (1)
にビデオ信号を記録あるいはテープからビデオ信号を再
生する磁気記録再生装置において、前記回転体の同一円
周上に等間隔に配置された偶数個の磁性体と、この円周
に対応する固定部に配設された２個の検出素子と、これ
ら検出素子より得られる信号により回転する前記磁気ヘ
ッドの回転位相信号及び周波数帰還信号を発生する回路
とを具備し、前記偶数個の磁性体のうち半数例の極性を
残りと逆にしたことを特徴とする磁気記録再生装置。In a magnetic recording/reproducing device that records a video signal on a tape or reproduces a video signal from a tape using a pair of magnetic heads attached to a rotating body, an even number of magnetic heads arranged at equal intervals on the same circumference of the rotating body are used. A magnetic body, two detecting elements disposed on a fixed part corresponding to the circumference, and a circuit that generates a rotational phase signal and a frequency feedback signal of the magnetic head that rotates based on signals obtained from these detecting elements. A magnetic recording and reproducing device, characterized in that the polarity of half of the even number of magnetic bodies is opposite to that of the remaining magnetic bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11487882U JPS5920456U (en) | 1982-07-30 | 1982-07-30 | magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11487882U JPS5920456U (en) | 1982-07-30 | 1982-07-30 | magnetic recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5920456U true JPS5920456U (en) | 1984-02-07 |
Family
ID=30265381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11487882U Pending JPS5920456U (en) | 1982-07-30 | 1982-07-30 | magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5920456U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03250125A (en) * | 1990-02-28 | 1991-11-07 | Iki Kaihatsu Kk | Muddy water outflow preventing device for gravel gathering equipment |
-
1982
- 1982-07-30 JP JP11487882U patent/JPS5920456U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03250125A (en) * | 1990-02-28 | 1991-11-07 | Iki Kaihatsu Kk | Muddy water outflow preventing device for gravel gathering equipment |
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