JPS5950053U - Tape end detection circuit - Google Patents
Tape end detection circuitInfo
- Publication number
- JPS5950053U JPS5950053U JP14458082U JP14458082U JPS5950053U JP S5950053 U JPS5950053 U JP S5950053U JP 14458082 U JP14458082 U JP 14458082U JP 14458082 U JP14458082 U JP 14458082U JP S5950053 U JPS5950053 U JP S5950053U
- Authority
- JP
- Japan
- Prior art keywords
- tape
- detection circuit
- reference voltage
- end detection
- tape end
- 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
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の光の反射率を模式的に示す図
、第２図は本考案の一実施例の回路図、第３図Ａ−Ｅは
第２図示の回路各部の信号波形図である。
５、 ６． ７・・・演算増幅器（オペアンプ）、９・
・・出力端子、Ｄ工・・・発光ダイオード、Ｄ２．Ｄ３
・・・ダイオード、Ｃ□・・・コンデンサ、Ｒ工〜Ｒ１
１・・・抵抗、ｖＲｌ・・・可変抵抗。Figure 1 is a diagram schematically showing the light reflectance of a cassette tape, Figure 2 is a circuit diagram of an embodiment of the present invention, and Figures 3A to 3E are signal waveform diagrams of various parts of the circuit shown in Figure 2. be. 5, 6. 7... operational amplifier (op-amp), 9.
...Output terminal, D-type...Light-emitting diode, D2. D3
...Diode, C□...Capacitor, R engineering ~ R1
1...Resistance, vRl...Variable resistance.
Claims (1)
る光センサと、該電気信号を微分して所定の基準電圧に
収束させる微分回路と、該微分回路より取出された微分
信号が該基準電圧より一定レベル以上であるとき又は該
基準電圧より該一定レベル以下であるときに検出信号を
出力する比較回路とよりなり、該テープの光の反射率又
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
出回路。An optical sensor that converts the amount of light reflected or transmitted by the tape into an electrical signal, a differentiation circuit that differentiates the electrical signal and converges it to a predetermined reference voltage, and the differential signal extracted from the differentiation circuit is used as the reference voltage. It consists of a comparison circuit that outputs a detection signal when the voltage is above a certain level or below the reference voltage, and detects the end of the tape based on a change in the light reflectance or transmittance of the tape. Tape end detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14458082U JPS5950053U (en) | 1982-09-24 | 1982-09-24 | Tape end detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14458082U JPS5950053U (en) | 1982-09-24 | 1982-09-24 | Tape end detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5950053U true JPS5950053U (en) | 1984-04-03 |
| JPH0222816Y2 JPH0222816Y2 (en) | 1990-06-20 |
Family
ID=30322374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14458082U Granted JPS5950053U (en) | 1982-09-24 | 1982-09-24 | Tape end detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5950053U (en) |
-
1982
- 1982-09-24 JP JP14458082U patent/JPS5950053U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0222816Y2 (en) | 1990-06-20 |
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