JPS58138447U

JPS58138447U - Meeting line calling circuit

Info

Publication number: JPS58138447U
Application number: JP3564382U
Authority: JP
Inventors: 裕之清水
Original assignee: 日本電気株式会社
Priority date: 1982-03-12
Filing date: 1982-03-12
Publication date: 1983-09-17

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図は従来の打合せ回線呼出回路を用いた無線装置の
一例を示す図、第２図は本考案による打合せ回線呼出回
路の構成を示す閣、第３図は本考案による打合せ回線呼
出回路の一実施例を示す図、第４図は呼出スイッチ回路
の詳細図である。１・・・アンテナ、２・・・送受信号共用器、３・・・
送信部、４・・・受信部、３５・・・送信側打合せ回線
呼出回路、３６，４６，５１．６１・・・バンドパスフ
ィルタ、４５・・・受信側打合せ回線呼出回路、５３゜
５４．６３．６４・・・切替スイッチ、６２１゜６３２
．６４１，６４２・・・電子スイッチ、６７・・・電子
スイッチ駆動回路、６７１・・・呼出スイッチ回路。FIG. 1 shows an example of a wireless device using a conventional meeting line calling circuit, FIG. 2 shows the configuration of a meeting line calling circuit according to the present invention, and FIG. 3 shows a meeting line calling circuit according to the present invention. FIG. 4, which shows one embodiment, is a detailed diagram of the call switch circuit. 1... Antenna, 2... Transmission/reception signal duplexer, 3...
Transmitting unit, 4... Receiving unit, 35... Transmitting side meeting line calling circuit, 36, 46, 51. 61... Band pass filter, 45... Receiving side meeting line calling circuit, 53°54. 63.64...Selector switch, 621°632
．． 641, 642...Electronic switch, 67...Electronic switch drive circuit, 671...Call switch circuit.

Claims

[Scope of utility model registration request]

In a meeting line paging circuit for making a call between transmitting and receiving stations that form a communication line facing each other, a specific frequency signal generator for paging, a paging □ signal from a receiver, or the specific frequency for paging is selected. a bandpass filter connected to the first selector switch, a ring tone generator that emits a ring tone in response to the ring signal, and the first selector switch selects the specific ring frequency. When switched to the output side, the bandpass filter output is switched to the transmitter side,
When the first changeover switch is switched to the side that outputs the ringing signal from the receiver, the first changeover switch is switched to output the output of the bandpass filter to the ringing tone generator side. A deposit line calling circuit consisting of an interlocking second changeover switch.