JPS6161670U - - Google Patents
Info
- Publication number
- JPS6161670U JPS6161670U JP14680884U JP14680884U JPS6161670U JP S6161670 U JPS6161670 U JP S6161670U JP 14680884 U JP14680884 U JP 14680884U JP 14680884 U JP14680884 U JP 14680884U JP S6161670 U JPS6161670 U JP S6161670U
- Authority
- JP
- Japan
- Prior art keywords
- zero
- cross detection
- magnet
- hall element
- index pulse
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
Description
第１図はフロツピーデイスク中のフオーマツト
を模式的に示す平面図。第２図は１トラツク分の
フオーマツトの一例を示す図。第３図は本考案の
一実施例を示す平面図。第４図は本考案の一実施
例の作用の説明に供する波形図。第５図は本考案
の一実施例に用いるゼロクロス検出回路の一例を
示す回路図。第６図は第５図に示したゼロクロス
検出回路の作用の説明に供する波形図。第７図は
従来のインデツクス発生回路の構成を示す平面図
。第８図は第７図の側面図。第９図は第７図に示
した従来例の作用の説明に供する波形図。
４……ロータ、１４……磁石、１５……ホール
素子、１６……ゼロクロス検出回路。
FIG. 1 is a plan view schematically showing the format in a floppy disk. FIG. 2 is a diagram showing an example of the format for one track. FIG. 3 is a plan view showing an embodiment of the present invention. FIG. 4 is a waveform diagram for explaining the operation of an embodiment of the present invention. FIG. 5 is a circuit diagram showing an example of a zero-cross detection circuit used in an embodiment of the present invention. FIG. 6 is a waveform diagram for explaining the operation of the zero-cross detection circuit shown in FIG. 5. FIG. 7 is a plan view showing the configuration of a conventional index generation circuit. FIG. 8 is a side view of FIG. 7. FIG. 9 is a waveform diagram for explaining the operation of the conventional example shown in FIG. 4... Rotor, 14... Magnet, 15... Hall element, 16... Zero cross detection circuit.
Claims (1)
極を具えた磁石を固着し、磁石に近接対向してホ
ール素子を設け、ホール素子の出力をゼロクロス
検出回路に供給して、ゼロクロス検出出力をイン
デツクスパルスとすることを特徴とするフロツピ
ーデイスクのインデツクスパルス発生装置。 A magnet with both NS and N poles is fixed to the outer circumference of the rotor that rotates the disk, and a Hall element is provided close to and opposite the magnet.The output of the Hall element is supplied to a zero-cross detection circuit, and the zero-cross detection output is used as an index pulse. An index pulse generator for a floppy disk, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984146808U JPH0132209Y2 (en) | 1984-09-28 | 1984-09-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984146808U JPH0132209Y2 (en) | 1984-09-28 | 1984-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6161670U true JPS6161670U (en) | 1986-04-25 |
| JPH0132209Y2 JPH0132209Y2 (en) | 1989-10-03 |
Family
ID=30705044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984146808U Expired JPH0132209Y2 (en) | 1984-09-28 | 1984-09-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0132209Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS641155A (en) * | 1987-06-22 | 1989-01-05 | Nippon Densan Kk | Index signal circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59160864A (en) * | 1983-02-28 | 1984-09-11 | Brother Ind Ltd | Magnetic disk device |
-
1984
- 1984-09-28 JP JP1984146808U patent/JPH0132209Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59160864A (en) * | 1983-02-28 | 1984-09-11 | Brother Ind Ltd | Magnetic disk device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS641155A (en) * | 1987-06-22 | 1989-01-05 | Nippon Densan Kk | Index signal circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0132209Y2 (en) | 1989-10-03 |