JPS62158945U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案の一実施例による中継回路の
ブロツク図、第２図は一般的な伝送系を示すブロ
ツク図、第３図は従来の中継回路を示すブロツク
図である。 図中、１，２は信号発信器、３，４は信号線、
５は双方向信号中継器、６，７はトランジスタ、
８，９，１１〜１６は抵抗器、３１，３２はダイ
オード素子、１７〜２０，３３，３４はフオトカ
プラ、２１，２２はＡＮＤゲート、２３，２４は
変流器、２５，２６は伝送信号源である。なお、
各図中同一符号は同一または相当部分を示す。 FIG. 1 is a block diagram of a relay circuit according to an embodiment of this invention, FIG. 2 is a block diagram showing a general transmission system, and FIG. 3 is a block diagram showing a conventional relay circuit. In the figure, 1 and 2 are signal transmitters, 3 and 4 are signal lines,
5 is a bidirectional signal repeater, 6 and 7 are transistors,
8, 9, 11-16 are resistors, 31, 32 are diode elements, 17-20, 33, 34 are photocouplers, 21, 22 are AND gates, 23, 24 are current transformers, 25, 26 are transmission signal sources It is. In addition,
The same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 発光部と受光部より成るフオトカプラにより互
いに絶縁された双方向信号中継器の両側に信号線
を介してそれぞれ接続された信号発信器を具え、
信号が“Ｈ”または“Ｌ”レベルによつて表現さ
れるデジタル信号の伝送系において、前記フオト
カプラの両端子間に前記信号線を介してダイオー
ド素子と前記フオトカプラの発光部とを並列に接
続することにより両信号線間を双方向に信号が伝
送されるようにしたことを特徴とする双方向信号
中継回路。 A bidirectional signal repeater that is insulated from each other by a photocoupler consisting of a light emitting part and a light receiving part is provided with signal transmitters connected to each side via signal lines,
In a digital signal transmission system in which a signal is expressed by an "H" or "L" level, a diode element and a light emitting part of the photocoupler are connected in parallel between both terminals of the photocoupler via the signal line. A bidirectional signal relay circuit characterized in that a signal is transmitted bidirectionally between both signal lines.