JPS6082866U

JPS6082866U - Audible signal transmission circuit for button telephone equipment

Info

Publication number: JPS6082866U
Application number: JP17545183U
Authority: JP
Inventors: 登梨木; 太田　武夫; 杉浦　隆三
Original assignee: 株式会社田村電機製作所
Priority date: 1983-11-15
Filing date: 1983-11-15
Publication date: 1985-06-08

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図はボタン電話装置の一例を示すブロック図、第２
図は本考案の実施例を示すブロック図である。５Ｔａ−−−親機（主装置）、５Ｔｂ１．５Ｔｂ２−・
・子機（ボタン電話機）、Ｌｔ・・・通話線、Ｌｓ・・
・信号線、ＴＧ・・・トーン発生器、ＳＲａ、　ＳＲｂ
・・・送受信回路、ＴＲｂ・・・トーンリンガ、ｎ・・
・変成器（スピーカ回路）、ＳＰｂ・・・スピーカ、Ｑ
□、Ｑ５・・・トランジスタ、Ｑ２・・・送信トランジ
スタ、Ｑ３・・・制御トランジスタ、Ｑ４・・・駆動ト
ランジスタ、Ｒ１−Ｒ１３・・・抵抗器、Ｄｌ、Ｄ２・
・・ダイオード。補正　昭５９．１．１０実用新案登録請求の範囲を次のように補正する。Ｏ実用新案登録請求の範囲主装置とボタン電話機との間を各個別の通話線と信号線
とにより接続し、かつ、前記主装置から前記通話線およ
び信号線を経て各個に送出される各個別の信号により前
記ボタン電話機に設けた共通のスピーカ回路を介してス
ピーカの駆動を行なうボタン電話装置において、前記信
号線へ可聴信号を送出するプッシュプル増幅回路と、該
増幅回路へ前記可聴信号を与える駆動トランジスタと、
前記可聴信号の送出時に前記プッシュプル増幅回路およ
び駆動トランジスタに対し共通回路側の電源を供給する
制御トランジスタとを前記主装置へ設け、前記可聴信号
の送出時以外には前記プッシュプル増幅回路を高出力イ
ンピーダンスとすることを特徴としたボタン電話装置の
可聴信号送出回路。FIG. 1 is a block diagram showing an example of a button telephone device, and FIG.
The figure is a block diagram showing an embodiment of the present invention. 5Ta---Main unit (main device), 5Tb1.5Tb2-・
- Handset (key telephone), Lt...call line, Ls...
・Signal line, TG...Tone generator, SRa, SRb
...Transmission/reception circuit, TRb...Tone ringer, n...
・Transformer (speaker circuit), SPb...Speaker, Q
□, Q5...Transistor, Q2...Transmission transistor, Q3...Control transistor, Q4...Drive transistor, R1-R13...Resistor, Dl, D2・
··diode. Amendment January 10, 1982 The scope of claims for utility model registration is amended as follows. O Utility Model Registration Claims A main device and a key telephone are connected by each individual telephone line and a signal line, and each individual unit is transmitted from the main device to each individual via the telephone line and signal line. A push-pull amplifier circuit that sends an audible signal to the signal line, and a push-pull amplifier circuit that supplies the audible signal to the amplification circuit, in a button telephone device that drives a speaker through a common speaker circuit provided in the button telephone device using a signal from the push-pull amplifier circuit. a drive transistor;
A control transistor is provided in the main device to supply power to the common circuit side to the push-pull amplifier circuit and the drive transistor when the audible signal is sent out, and the push-pull amplifier circuit is set to a high level except when the audible signal is sent out. An audible signal sending circuit for a button telephone device, characterized by having an output impedance.

Claims

[Scope of utility model registration request]

The main device and the key telephone are connected by individual talking lines and signal lines, and each individual audible signal is transmitted from the main device to each individual via the talking line and the signal line, and A push-pull amplifier circuit that sends the audible signal to the signal line, a drive transistor that supplies the audible signal to the amplification circuit, and a star. , a control transistor for supplying power on a common circuit side to the push-pull, amplifier circuit, and drive transistor when sending out the audible signal is provided in the main device; An audible signal output path of a button telephone device characterized by having a high output impedance.