JPH0175359U - - Google Patents
Info
- Publication number
- JPH0175359U JPH0175359U JP1987170922U JP17092287U JPH0175359U JP H0175359 U JPH0175359 U JP H0175359U JP 1987170922 U JP1987170922 U JP 1987170922U JP 17092287 U JP17092287 U JP 17092287U JP H0175359 U JPH0175359 U JP H0175359U
- Authority
- JP
- Japan
- Prior art keywords
- medium
- floppy disk
- disk device
- spindle motor
- rotation control
- 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 4
Landscapes
- Rotational Drive Of Disk (AREA)
Description
第１図はこの考案の一実施例であるフロピーデ
イスク装置におけるスピンドルモータの速度制御
回路を示すブロツク図、第２図は従来のフロツピ
ーデイスク装置の回路構成を示すブロツク図、第
３図は第２図のフロツピーデイスク装置における
スピンドルモータの速度制御回路を示すブロツク
図、第４図は第３図のスピンドルモータにおける
速度制御を説明するための各部の信号波形を示す
タイミングチヤートである。
図において、１…１／２分周回路、２…Ａカウ
ンタ制御回路、３…Ａカウンタ、４…Ｂカウンタ
制御回路、５…Ｂカウンタ、６…ＳＴＡＲＴ／Ｓ
ＴＯＰ回路、７…インバータ、８〜１３…ゲード
回路、１４…フロツピーデイスク装置コントロー
ルＩＣ、１５…スピンドルモータコントロール回
路、である。なお、図中、同一符号は同一、又は
相当部分を示す。
Fig. 1 is a block diagram showing the speed control circuit of a spindle motor in a floppy disk device which is an embodiment of this invention, Fig. 2 is a block diagram showing the circuit configuration of a conventional floppy disk device, and Fig. 3 is a block diagram showing the circuit configuration of a conventional floppy disk device. FIG. 2 is a block diagram showing the speed control circuit of the spindle motor in the floppy disk device, and FIG. 4 is a timing chart showing signal waveforms of various parts to explain speed control in the spindle motor of FIG. 3. In the figure, 1...1/2 frequency divider circuit, 2...A counter control circuit, 3...A counter, 4...B counter control circuit, 5...B counter, 6...START/S
TOP circuit, 7...inverter, 8-13... gate circuit, 14... floppy disk device control IC, 15... spindle motor control circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
ロツピーデイスク装置において、上記スピンドル
モータは、媒体をリード／ライトさせるための定
常回転制御機能と、この定常回転制御機能による
回転速度よりも低速度で、かつ上記媒体をリード
／ライトさせる以外の低速回転制御機構とを有す
ることを特徴とするフロツピーデイスク装置。 In a floppy disk device equipped with a spindle motor that rotates a medium, the spindle motor has a constant rotation control function for reading/writing the medium, and a rotation speed lower than the rotation speed due to this constant rotation control function, and A floppy disk device characterized by having a low-speed rotation control mechanism other than reading/writing a medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987170922U JPH0175359U (en) | 1987-11-09 | 1987-11-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987170922U JPH0175359U (en) | 1987-11-09 | 1987-11-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0175359U true JPH0175359U (en) | 1989-05-22 |
Family
ID=31462288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987170922U Pending JPH0175359U (en) | 1987-11-09 | 1987-11-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0175359U (en) |
-
1987
- 1987-11-09 JP JP1987170922U patent/JPH0175359U/ja active Pending
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