JPS58182546U

JPS58182546U - Public telephone reminder sound transmission circuit

Info

Publication number: JPS58182546U
Application number: JP7910982U
Authority: JP
Inventors: 光夫木村; 山岡　勲
Original assignee: アンリツ株式会社
Priority date: 1982-05-31
Filing date: 1982-05-31
Publication date: 1983-12-05

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図は従来の公衆電話機の主要部を示すブロック図、
第２図は第１−図の回路が出力する信号波形図、第３図
は従来の回路に用いられていた発振器を示す回路図、第
４図は本考案に係る催促音送出回路の一実施例を示すブ
ロック図、第５図は第４図のブロックで示した波形変換
回路の具体例を示す回路図、第６図は第５図に示す回路
の各部における信号波形図である。１・・・・・・通話回路、２・・・・・・制御回路、５
・・開催促音送出信号発生部、１０・・四クロック信号
発生回路、１１・・・・・・ゲート回路、１２・・・・
・・波形変換回路、Ｒ・・・・・・受話器。Figure 1 is a block diagram showing the main parts of a conventional public telephone.
Figure 2 is a signal waveform diagram output by the circuit in Figures 1-1, Figure 3 is a circuit diagram showing an oscillator used in the conventional circuit, and Figure 4 is an implementation of the reminder sound sending circuit according to the present invention. FIG. 5 is a circuit diagram showing a specific example of the waveform conversion circuit shown in the blocks of FIG. 4, and FIG. 6 is a signal waveform diagram at each part of the circuit shown in FIG. 5. 1... Call circuit, 2... Control circuit, 5
・・Holding consonant transmission signal generation unit, 10 ・・Four clock signal generation circuit, 11 ・・・Gate circuit, 12 ・・・
...Waveform conversion circuit, R...Telephone receiver.

Claims

[Scope of utility model registration request]

(1) A reminder tone sending circuit for a public telephone whose telephone call circuit is controlled by a control circuit incorporating a pulse signal generation circuit, which is provided on the control circuit side and is based on currency detection information or remaining energy information. a reminder sound transmission signal generating section that generates a reminder sound transmission signal; a gate circuit that applies a pulse signal generated by the pulse signal generation circuit to the communication circuit in accordance with the reminder sound transmission signal; 1. A reminder sound transmission circuit for a public telephone set, comprising a waveform conversion circuit that converts a pulse signal from the pulse signal generating circuit that has passed through the gate circuit into a reminder sound signal and sends the signal to a receiver.

(2) A reminder sound transmission circuit for a public telephone according to claim 1, wherein the waveform conversion circuit is composed of only a differentiating circuit.

(3) The reminder tone sending circuit for a public telephone according to claim 1, wherein the waveform conversion circuit is comprised of a frequency divider and a differentiation circuit.

(4) The waveform conversion circuit includes a frequency divider that receives a clock pulse signal from a clock generation circuit, divides the frequency thereof, and outputs the divided signal, and a NAND of the output of this frequency divider and the clock pulse signal. A reminder sound transmission circuit for a public telephone according to claim 1, which is comprised of a NAND circuit for obtaining a value and a differentiating circuit for differentiating the output of the NAND circuit.