JPS6437958U - - Google Patents
Info
- Publication number
- JPS6437958U JPS6437958U JP13051087U JP13051087U JPS6437958U JP S6437958 U JPS6437958 U JP S6437958U JP 13051087 U JP13051087 U JP 13051087U JP 13051087 U JP13051087 U JP 13051087U JP S6437958 U JPS6437958 U JP S6437958U
- Authority
- JP
- Japan
- Prior art keywords
- disk device
- flexible disk
- comparator
- switching
- medium
- 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 1
- 230000003287 optical effect Effects 0.000 claims 1
- 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レキシブ
ルデイスク装置の光検出装置における回路構成を
示す電気回路図、第２図はこの考案の他の実施例
であるフレキシブルデイスク装置の光検出装置に
おける回路構成を示す電気回路図、第３図ａ及び
ｂは従来のフレキシブルデイスク装置における光
検出装置の概略構成を示す一部断面図及び使用さ
れる媒体を示す平面図、第４図は第３図ａの光検
出装置における回路構成を示す電気回路図、第５
図は第４図の回路構成における各部の信号波形を
示すタイミング図である。
図において、１……媒体、２……モータ、３…
…コレツト、４……インデツクスホール、５……
発光ダイオード、６……フオトトタンジスタ、７
……コンパレータ、８，９，１２……抵抗、１０
，１１，１４……電流制限用抵抗、１３……トラ
ンジスタ 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 an electric circuit diagram showing the circuit configuration of a photodetector of a flexible disk device which is an embodiment of this invention, and Fig. 2 is a circuit diagram of a photodetector of a flexible disk device which is another embodiment of this invention. FIGS. 3a and 3b are partial cross-sectional views showing the schematic structure of a photodetector in a conventional flexible disk device, and a plan view showing the medium used; FIG. Electric circuit diagram showing the circuit configuration in the photodetecting device, No. 5
The figure is a timing diagram showing signal waveforms at various parts in the circuit configuration of FIG. 4. In the figure, 1...medium, 2...motor, 3...
...Collect, 4...Index hole, 5...
Light emitting diode, 6... Photo transistor, 7
... Comparator, 8, 9, 12 ... Resistor, 10
, 11, 14... current limiting resistor, 13... transistor. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
を備え、媒体に設けられたインデツクスホールを
検出することにより回転周期信号を検出するフレ
キシブルデイスク装置において、上記コンパレー
タのしきい値を記録密度切換用信号により切り換
える手段を備えたことを特徴とするフレキシブル
デイスク装置。 In a flexible disk device that includes a comparator that discriminates the output of an optical detection means and detects a rotation period signal by detecting an index hole provided in the medium, the threshold value of the comparator is set by a recording density switching signal. A flexible disk device characterized by having a means for switching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13051087U JPS6437958U (en) | 1987-08-27 | 1987-08-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13051087U JPS6437958U (en) | 1987-08-27 | 1987-08-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6437958U true JPS6437958U (en) | 1989-03-07 |
Family
ID=31385742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13051087U Pending JPS6437958U (en) | 1987-08-27 | 1987-08-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6437958U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9226489B2 (en) | 2011-03-18 | 2016-01-05 | Ecolab Usa Inc. | Heat system for killing pests |
-
1987
- 1987-08-27 JP JP13051087U patent/JPS6437958U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9226489B2 (en) | 2011-03-18 | 2016-01-05 | Ecolab Usa Inc. | Heat system for killing pests |
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