JPS6344232U - - Google Patents
Info
- Publication number
- JPS6344232U JPS6344232U JP13586286U JP13586286U JPS6344232U JP S6344232 U JPS6344232 U JP S6344232U JP 13586286 U JP13586286 U JP 13586286U JP 13586286 U JP13586286 U JP 13586286U JP S6344232 U JPS6344232 U JP S6344232U
- Authority
- JP
- Japan
- Prior art keywords
- input terminal
- tape
- magnetic tape
- photocoupler
- comparator
- 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
- 238000003708 edge detection Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
Description
第１図及び第２図は本考案の実施例を示し、第
１図はブロツク図、第２図は各部の波形図、第３
図は従来の磁気テープの端部検出回路を示すブロ
ツク図、第４図は同図各部の波形図である。
１，２……抵抗、３……基準電圧源、４……ス
イツチ、２０……磁気テープ、２１……リーダー
テープ、２２……フオトカプラ、２３……発光素
子、２４……受光素子、時、２６……定数回路、
３０……比較器の一方の入力端子、３１……他方
の入力端子、Ｔ……テープ、Ｒ１，Ｒ４……互い
に独立した抵抗。
Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a block diagram, Figure 2 being a waveform diagram of each part, and Figure 3 being a waveform diagram of each part.
The figure is a block diagram showing a conventional magnetic tape edge detection circuit, and FIG. 4 is a waveform diagram of various parts of the same figure. DESCRIPTION OF SYMBOLS 1, 2...Resistor, 3...Reference voltage source, 4...Switch, 20...Magnetic tape, 21...Leader tape, 22...Photocoupler, 23...Light emitting element, 24...Light receiving element, Time, 26...Constant circuit,
30...One input terminal of the comparator, 31...The other input terminal, T...Tape, R1 , R4 ...Resistors independent of each other.
Claims (1)
ープを接続してなるテープの表裏にフオトカプラ
を対向的に配置し、このフオトカプラの出力端を
、互いに独立した抵抗を介して比較器の一方の入
力端子と他方の入力端子とに接続するとともに、
この他方の入力端子に時定数回路を接続し、前記
一方の入力端子を基準電圧源にスイツチを介して
接続し、このスイツチはタイマ部に接続されてお
り、検出開始時から一定時間だけ接状態に制御さ
れることを特徴とする磁気テープの端部検出回路
。 A transparent leader tape is connected to the beginning and end of the magnetic tape, and photocouplers are placed oppositely on the front and back sides of the tape, and the output ends of the photocoupler are connected to one input terminal of the comparator through independent resistors. and the other input terminal, and
A time constant circuit is connected to this other input terminal, and said one input terminal is connected to a reference voltage source via a switch. A magnetic tape edge detection circuit characterized in that it is controlled by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13586286U JPS6344232U (en) | 1986-09-04 | 1986-09-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13586286U JPS6344232U (en) | 1986-09-04 | 1986-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6344232U true JPS6344232U (en) | 1988-03-24 |
Family
ID=31038451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13586286U Pending JPS6344232U (en) | 1986-09-04 | 1986-09-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6344232U (en) |
-
1986
- 1986-09-04 JP JP13586286U patent/JPS6344232U/ja active Pending
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