JPS61136370U - - Google Patents
Info
- Publication number
- JPS61136370U JPS61136370U JP1731585U JP1731585U JPS61136370U JP S61136370 U JPS61136370 U JP S61136370U JP 1731585 U JP1731585 U JP 1731585U JP 1731585 U JP1731585 U JP 1731585U JP S61136370 U JPS61136370 U JP S61136370U
- Authority
- JP
- Japan
- Prior art keywords
- output
- optical sensor
- reference value
- index signal
- index
- 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 4
- 238000012935 Averaging Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 5
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
- Rotational Drive Of Disk (AREA)
Description
第１図は本考案に係るインデツクス信号検出装
置の好適な実施例を示すブロツク回路図、第２図
、３図は第１図の作用説明図、第４図は本考案に
おけるインデツクマークの他の実施例を示す要部
断面図、第５図は一般的なインデツクス信号検出
装置の概略を示す説明図、第６図は第５図の作用
説明図である。
１０…ロータ、１４…フロツピデイスク、１８
…インデツクスマーク、２０…光センサ、２４…
浮動基準値出力回路、２６…平均化回路、３０…
比較器。
FIG. 1 is a block circuit diagram showing a preferred embodiment of the index signal detection device according to the present invention, FIGS. 2 and 3 are explanatory diagrams of the operation of FIG. 1, and FIG. FIG. 5 is an explanatory diagram showing an outline of a general index signal detection device, and FIG. 6 is an explanatory diagram of the operation of FIG. 5. 10... Rotor, 14... Floppy disc, 18
...Index mark, 20...Light sensor, 24...
Floating reference value output circuit, 26... Averaging circuit, 30...
Comparator.
Claims (1)
ロータ近傍に設けられた光センサによつて駆動モ
ータのロータに設けられたインデツクスマークを
読取るインデツクス信号検出装置において、光セ
ンサの出力を順次平均化する平均化回路を有し光
センサ出力の平均出力に応じた浮動基準値を出力
する浮動基準値出力回路と、 前記駆動基準値と光センサ出力とを比較してイ
ンデツクス信号を出力する比較器と、を含み、イ
ンデツクスマークの読取誤差を除去したことを特
徴とするフロツピデイスクドライブのインデツク
ス信号検出装置。[Scope of Claim for Utility Model Registration] In an index signal detection device that reads an index mark provided on the rotor of a drive motor by an optical sensor provided near the rotor of a drive motor that rotationally drives a floppy disk, the output of the optical sensor is a floating reference value output circuit that has an averaging circuit that sequentially averages the output of the optical sensor and outputs a floating reference value according to the average output of the optical sensor output; and a floating reference value output circuit that outputs an index signal by comparing the driving reference value and the optical sensor output. 1. An index signal detection device for a floppy disk drive, comprising: a comparator for removing an index mark reading error.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1731585U JPS61136370U (en) | 1985-02-08 | 1985-02-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1731585U JPS61136370U (en) | 1985-02-08 | 1985-02-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61136370U true JPS61136370U (en) | 1986-08-25 |
Family
ID=30504904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1731585U Pending JPS61136370U (en) | 1985-02-08 | 1985-02-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61136370U (en) |
-
1985
- 1985-02-08 JP JP1731585U patent/JPS61136370U/ja active Pending
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