JPS5971445U - Tape end detection device - Google Patents
Tape end detection deviceInfo
- Publication number
- JPS5971445U JPS5971445U JP16319382U JP16319382U JPS5971445U JP S5971445 U JPS5971445 U JP S5971445U JP 16319382 U JP16319382 U JP 16319382U JP 16319382 U JP16319382 U JP 16319382U JP S5971445 U JPS5971445 U JP S5971445U
- Authority
- JP
- Japan
- Prior art keywords
- tape end
- tape
- signal
- detection device
- 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
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はカセットテープ等のテープ端付近の構造を示す
図、第２図は本考案になるテープ端検出装置の一実施例
の回路図、第３図Ａ〜第３図Ｃは第２図の回路の各部の
信号波形図である。
１・・・全波整流器、２・・・比較器、３・・・出力端
子、Ｓ□、Ｓ２・・・光センサ、Ｄｌ、Ｄ２・・・発光
ダイオード、Ｘ□、ｘ２・・・フォトトランジスタ、Ｒ
□〜Ｒ１ｏ・・・抵抗、ＶＲｌ、ＶＨ２・・・可変抵抗
、０１〜Ｃ４・・・コンデンサ、ＯＰ・・・演算増幅器
（オペアンプ）、Ｅ・・・直流電圧源、Ｔ・・・テープ
。Fig. 1 is a diagram showing the structure near the end of a tape such as a cassette tape, Fig. 2 is a circuit diagram of an embodiment of the tape end detection device of the present invention, and Figs. 3A to 3C are Fig. 2. FIG. 3 is a signal waveform diagram of each part of the circuit. 1... Full wave rectifier, 2... Comparator, 3... Output terminal, S□, S2... Light sensor, Dl, D2... Light emitting diode, X□, x2... Phototransistor ,R
□~R1o...Resistor, VRl, VH2...Variable resistor, 01~C4...Capacitor, OP...Operation amplifier (operational amplifier), E...DC voltage source, T...Tape.
Claims (1)
個の光センサと、−該２個の光センサから得られる該電
気信号をそれぞれ積分した２信号を比較することにより
該電気信号に対応した所定の極性の信号を取出す演算増
幅器と、該演算増幅器より取出された信号が所定の直流
基準電圧レベルを越えたとき検出信号を出力する比較器
とよりなり該テープ端の光の反射率又は透過率の変化に
よってテープ端を検出するテープ端検出装置。Converting reflected light or transmitted light on the tape surface into electrical signals 2
- an operational amplifier that extracts a signal of a predetermined polarity corresponding to the electrical signal by comparing two signals obtained by integrating the electrical signals obtained from the two optical sensors; A tape end detection device includes a comparator that outputs a detection signal when a signal extracted from the tape exceeds a predetermined DC reference voltage level, and detects a tape end based on a change in light reflectance or transmittance at the tape end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16319382U JPS5971445U (en) | 1982-10-29 | 1982-10-29 | Tape end detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16319382U JPS5971445U (en) | 1982-10-29 | 1982-10-29 | Tape end detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5971445U true JPS5971445U (en) | 1984-05-15 |
Family
ID=30358150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16319382U Pending JPS5971445U (en) | 1982-10-29 | 1982-10-29 | Tape end detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5971445U (en) |
-
1982
- 1982-10-29 JP JP16319382U patent/JPS5971445U/en active Pending
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