JPS59187251U

JPS59187251U - branch coupling circuit

Info

Publication number: JPS59187251U
Application number: JP8079383U
Authority: JP
Inventors: 増田　博行
Original assignee: 日本電気株式会社
Priority date: 1983-05-27
Filing date: 1983-05-27
Publication date: 1984-12-12

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

[Brief explanation of drawings]

第１図は従来の分岐結合ブ冶ツク図。第２図は本考案の
一実施例を示すブロック図。１、　２．　３・・・第１１第２、第３ハイブリッド回
路、ｌａ、　２ａ、　３ａ−入出力端子、１ｂ、　２ｂ
。３ｂ・・・入力端子、ｌｃ、　　２Ｃ，３Ｃ・・・出力
端子、４゜５．６・・・第１、第２、第３増幅回路、７
．８・・・第１、第２キャリア検出回路、９．１０・・
・第１、第２開閉回路、１０ａ・・・切換スイッチ、１
１・・・減衰回路。FIG. 1 is a diagram of a conventional branching and coupling block. FIG. 2 is a block diagram showing an embodiment of the present invention. 1, 2. 3...11th second and third hybrid circuits, la, 2a, 3a-input/output terminals, 1b, 2b
. 3b...input terminal, lc, 2C, 3C...output terminal, 4°5.6...first, second, third amplifier circuit, 7
．． 8...first and second carrier detection circuits, 9.10...
・First and second switching circuits, 10a... changeover switch, 1
1... Attenuation circuit.

Claims

[Claims for Utility Model Registration] A first hybrid circuit, a first amplifier circuit that amplifies the signal at the output terminal of the first hybrid circuit, and a second amplifier circuit that amplifies the signal at the output terminal of the first hybrid circuit. a second hybrid circuit whose input terminal receives the output of the first amplifier circuit; a third hybrid circuit whose input terminal receives the output of the second amplifier circuit; and an output terminal of the second hybrid circuit. a signal at the output terminal of the first hybrid circuit, and a third amplifier circuit that amplifies the signal at the output terminal of the third hybrid circuit and supplies the signal to the input terminal of the first hybrid circuit. a first carrier detection circuit that receives the output of the attenuation circuit; a first switching circuit that operates based on the detection output of the first carrier detection circuit; and an output of the third amplifier circuit that receives the output of the third amplifier circuit. a second carrier detection circuit; a second switching circuit operated by the detection output of the second carrier detection circuit; and a second switching circuit inserted between the output of the first amplifier circuit and the input terminal of the second No. 1 hybrid circuit. an operating contact of the first switching circuit; an operating contact of the first switching circuit inserted between the output of the second amplifier circuit and the input terminal of the third hybrid circuit; an operating contact of the first switching circuit connected between the output terminal of the hybrid circuit and the input of the third amplifier circuit; and an open contact between the output terminal of the third hybrid circuit and the input of the third amplifier circuit. A branching/coupling circuit comprising: an actuation open contact of the first switching circuit connected therebetween; and an actuation close contact of the second switching circuit that bypasses the attenuation circuit.