JPS63168629U - - Google Patents
Info
- Publication number
- JPS63168629U JPS63168629U JP5953087U JP5953087U JPS63168629U JP S63168629 U JPS63168629 U JP S63168629U JP 5953087 U JP5953087 U JP 5953087U JP 5953087 U JP5953087 U JP 5953087U JP S63168629 U JPS63168629 U JP S63168629U
- Authority
- JP
- Japan
- Prior art keywords
- light
- tape
- output
- lit
- end detection
- 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 5
- 238000002834 transmittance Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Description
第１図は本考案に係るテープ端検出装置の実施
例を示すブロツク図、第２図ａ〜ｃは発光信号と
受光部出力とのタイミングを示すタイミング図、
第３図は従来のテープ端検出装置を示すブロツク
図、第４図ａ〜ｅは外来光がない場合とある場合
の検出信号のレベル変化を示すタイミング図であ
る。
１…磁気テープ、２…発光部、３…受光部、６
…数値比較部。
FIG. 1 is a block diagram showing an embodiment of the tape end detection device according to the present invention, and FIGS. 2 a to 2 c are timing diagrams showing the timing of the light emission signal and the output of the light receiving section.
FIG. 3 is a block diagram showing a conventional tape end detection device, and FIGS. 4 a to 4 e are timing diagrams showing changes in the level of the detection signal when there is no external light and when there is external light. 1... Magnetic tape, 2... Light emitting section, 3... Light receiving section, 6
...Numerical comparison section.
Claims (1)
テープ端に設けられた磁気テープを挟んで点滅動
作する発光部と受光部とが設けられ、該発光部が
点灯しているときの受光部出力と点灯していない
ときの受光部出力との差レベルが検出され、該差
レベルの大きさによつて前記テープ端の検出動作
がなされることを特徴とするテープ端検出装置。 A light-emitting part and a light-receiving part are provided that operate to blink across a magnetic tape in which a leader part whose light transmittance is larger than the recordable/reproducible area is provided at the end of the tape, and the output of the light-receiving part when the light-emitting part is lit. A tape end detection device characterized in that a difference level between the output of the light receiving section and the light receiving section output when the light is not lit is detected, and the tape end detection operation is performed based on the magnitude of the difference level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5953087U JPS63168629U (en) | 1987-04-20 | 1987-04-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5953087U JPS63168629U (en) | 1987-04-20 | 1987-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63168629U true JPS63168629U (en) | 1988-11-02 |
Family
ID=30891107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5953087U Pending JPS63168629U (en) | 1987-04-20 | 1987-04-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63168629U (en) |
-
1987
- 1987-04-20 JP JP5953087U patent/JPS63168629U/ja active Pending
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