JPS5848056U - Motor drive circuit - Google Patents
Motor drive circuitInfo
- Publication number
- JPS5848056U JPS5848056U JP14143881U JP14143881U JPS5848056U JP S5848056 U JPS5848056 U JP S5848056U JP 14143881 U JP14143881 U JP 14143881U JP 14143881 U JP14143881 U JP 14143881U JP S5848056 U JPS5848056 U JP S5848056U
- Authority
- JP
- Japan
- Prior art keywords
- reel motor
- voltage
- drive circuit
- motor
- low
- 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
- Motor And Converter Starters (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は磁気記録再生装置のリールモータの説明図、第
２図Ａ、 Ｂは従来のモータ駆動電圧のタイムチャート
、第３図は本考案のモータ駆動回路の一実施例の回路図
、第４図Ａ〜Ｅは本考案のモータ駆動回路の各部の電圧
を示す説明図、第５図は本考案のモータ駆動回路の他の
実施例の回路図である。
図中符号２，１０はリールモータ、５は早送り／平反し
信号端子、６はタイミング回路、７はアンド回路、８は
駆動電圧切換回路、１１はノア回路、１２はオア回路、
１３はインバータである。FIG. 1 is an explanatory diagram of a reel motor of a magnetic recording/reproducing device, FIGS. 2A and B are time charts of conventional motor drive voltages, and FIG. 3 is a circuit diagram of an embodiment of the motor drive circuit of the present invention. 4A to 4E are explanatory diagrams showing voltages at various parts of the motor drive circuit of the present invention, and FIG. 5 is a circuit diagram of another embodiment of the motor drive circuit of the present invention. In the figure, numerals 2 and 10 are reel motors, 5 is a fast-forward/flipping signal terminal, 6 is a timing circuit, 7 is an AND circuit, 8 is a drive voltage switching circuit, 11 is a NOR circuit, 12 is an OR circuit,
13 is an inverter.
Claims (1)
磁気記録再生装置のモータ駆動回路にお・ いて、前
記リールモータを低速で駆動する低圧の前記駆動電圧と
、前記リールモータの始動時に該低圧の前記駆動電圧を
前記リールモータに供給する供給手段と、該低圧の前記
駆動電圧が前記り−ルモータへ供給されている時間を前
記始動時から計数するタイミング手段とを具備し、前記
タイミング手段で得た計数値に応じて前記リールモータ
を変速するよう構成したことを特徴とするモータ駆動回
路。In a motor drive circuit of a magnetic recording and reproducing device that is provided with a reel motor that changes speed depending on the level of a drive voltage, the drive voltage is a low voltage that drives the reel motor at low speed, and the low voltage is applied when the reel motor is started. supply means for supplying the drive voltage of 100% to the reel motor, and a timing means for counting the time period during which the low-voltage drive voltage is supplied to the reel motor from the time of starting, the timing means A motor drive circuit characterized in that the reel motor is configured to change speed according to the obtained count value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14143881U JPS5848056U (en) | 1981-09-25 | 1981-09-25 | Motor drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14143881U JPS5848056U (en) | 1981-09-25 | 1981-09-25 | Motor drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5848056U true JPS5848056U (en) | 1983-03-31 |
Family
ID=29934537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14143881U Pending JPS5848056U (en) | 1981-09-25 | 1981-09-25 | Motor drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5848056U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63186571U (en) * | 1987-05-22 | 1988-11-30 | ||
| JPH0223970U (en) * | 1988-07-29 | 1990-02-16 |
-
1981
- 1981-09-25 JP JP14143881U patent/JPS5848056U/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63186571U (en) * | 1987-05-22 | 1988-11-30 | ||
| JPH0223970U (en) * | 1988-07-29 | 1990-02-16 |
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