JPH0394097U - - Google Patents
Info
- Publication number
- JPH0394097U JPH0394097U JP1990002364U JP236490U JPH0394097U JP H0394097 U JPH0394097 U JP H0394097U JP 1990002364 U JP1990002364 U JP 1990002364U JP 236490 U JP236490 U JP 236490U JP H0394097 U JPH0394097 U JP H0394097U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- frequency division
- pulse width
- disk drive
- pulse signal
- 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
- 238000010586 diagram Methods 0.000 description 7
Description
第１図は、この考案よるデイスク駆動回路の一
実施例を示す回路図、第２図〜第４図は、この考
案によるデイスク駆動回路の動作を説明するため
の波形図、第５図は、この考案によるデイスク駆
動回路の他の実施例を示す回路図、第６図は従来
のデイスク駆動回路の一例を示す回路図、第７図
は第６図に示す従来回路の動作を説明するための
波形図、第８図は従来のデイスク駆動回路の他の
例を示す回路図である。
１……比較器、２，１４……分周器、３，１５
〜１８……ＡＮＤゲート、４……切換ゲート、５
……ドライブトランジスタ、６……モーター、１
１……低域通過フイルタ、１２……コンパレータ
、１３……マイクロコンピユータ。
FIG. 1 is a circuit diagram showing an embodiment of the disk drive circuit according to this invention, FIGS. 2 to 4 are waveform diagrams for explaining the operation of the disk drive circuit according to this invention, and FIG. FIG. 6 is a circuit diagram showing another embodiment of the disk drive circuit according to this invention, FIG. 6 is a circuit diagram showing an example of a conventional disk drive circuit, and FIG. 7 is a circuit diagram for explaining the operation of the conventional circuit shown in FIG. 6. The waveform diagram in FIG. 8 is a circuit diagram showing another example of a conventional disk drive circuit. 1... Comparator, 2, 14... Frequency divider, 3, 15
~18...AND gate, 4...Switching gate, 5
...Drive transistor, 6...Motor, 1
1...Low pass filter, 12...Comparator, 13...Microcomputer.
Claims (1)
当するパルス幅をもつパルス信号を発生するパル
ス幅変調回路と、 前記パルス幅変調回路からのパルス信号を分周
する分周回路と、 前記分周回路からの分周比出力信号を前記分周
比により定まるパルス数のパルス信号としてデイ
スク駆動回路に供給する制御回路と、 を備えて成ることを特徴とするデイスク駆動回路
。[Claims for Utility Model Registration] A pulse width modulation circuit that generates a pulse signal having a pulse width corresponding to the deviation of the disk rotation speed from a reference rotation speed, and a frequency division circuit that divides the pulse signal from the pulse width modulation circuit. 1. A disk drive circuit comprising: a circuit; and a control circuit that supplies a frequency division ratio output signal from the frequency division circuit to a disk drive circuit as a pulse signal with a number of pulses determined by the frequency division ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990002364U JPH0394097U (en) | 1990-01-17 | 1990-01-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990002364U JPH0394097U (en) | 1990-01-17 | 1990-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0394097U true JPH0394097U (en) | 1991-09-25 |
Family
ID=31506241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990002364U Pending JPH0394097U (en) | 1990-01-17 | 1990-01-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0394097U (en) |
-
1990
- 1990-01-17 JP JP1990002364U patent/JPH0394097U/ja active Pending
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