JPS61118148U - - Google Patents
Info
- Publication number
- JPS61118148U JPS61118148U JP1985000372U JP37285U JPS61118148U JP S61118148 U JPS61118148 U JP S61118148U JP 1985000372 U JP1985000372 U JP 1985000372U JP 37285 U JP37285 U JP 37285U JP S61118148 U JPS61118148 U JP S61118148U
- Authority
- JP
- Japan
- Prior art keywords
- turntable
- phase signals
- detected
- rotation
- controlled
- 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
- 238000001514 detection method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Rotational Drive Of Disk (AREA)
- Control Of Velocity Or Acceleration (AREA)
- Control Of Electric Motors In General (AREA)
Description
第１図は本考案のターンテーブル駆動回路の系
統図、第２図は第１図の波形説明図である。
１，２……プリアンプ、３……位相検出器、４
……加算器、５……サーボ回路、Ｐ……磁気パル
ス、Ｈ１，Ｈ２……検出ヘツド、Ｍ……ターンテ
ーブルモータ。
FIG. 1 is a system diagram of the turntable drive circuit of the present invention, and FIG. 2 is a waveform explanatory diagram of FIG. 1. 1, 2...Preamplifier, 3...Phase detector, 4
... Adder, 5 ... Servo circuit, P ... Magnetic pulse, H 1 , H 2 ... Detection head, M ... Turntable motor.
Claims (1)
２相の信号を検出し、該２相信号によつてターン
テーブルの回転方向を検出し、サーボ系を通して
上記ターンテーブルのモータをコントロールする
様になされたターンテーブルにおいて、上記２相
信号を信号が増大する位相になるように加算した
加算信号を回転速度検出信号として上記ターンテ
ーブルモータを速度制御するようにしたことを特
徴とするターンテーブル駆動回路。 Two-phase signals having different phases are detected in synchronization with the rotation of the turntable, the direction of rotation of the turntable is detected by the two-phase signals, and the motor of the turntable is controlled through a servo system. 1. A turntable drive circuit, wherein the turntable motor is controlled in speed by using a summed signal obtained by adding the two-phase signals so that the signal increases in phase as a rotational speed detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985000372U JPS61118148U (en) | 1985-01-07 | 1985-01-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985000372U JPS61118148U (en) | 1985-01-07 | 1985-01-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61118148U true JPS61118148U (en) | 1986-07-25 |
Family
ID=30472151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985000372U Pending JPS61118148U (en) | 1985-01-07 | 1985-01-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61118148U (en) |
-
1985
- 1985-01-07 JP JP1985000372U patent/JPS61118148U/ja active Pending
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