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Telephone alarm

A technology for alarms and telephones, applied in the direction of telephone communication, electrical components, etc., can solve the problems of high power consumption of telephone alarms, and achieve the effect of reducing production costs

Inactive Publication Date: 2003-11-26
DAQING PETROLEUM ADMINISTRATION
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The rapid development of the modern communication network makes the telephone alarm widely used in various unattended important places. The current telephone alarm in the prior art usually uses a single-chip microcomputer such as Inter8098 or Z80 as the alarm trigger and cyclic dialing control unit. Although this It can effectively complete the control function, but it will generate a large power consumption when the telephone alarm works normally. Therefore, it must be able to work normally under the condition of an external working DC power supply or a battery. Once the external power supply fails or is destroyed by man , the alarm will be disabled

Method used

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with accompanying drawing:

[0015] Such as figure 1 As shown in the figure, IC1 in the number storage and sending unit uses EM91403 as the integrated circuit chip IC1, and the external general-purpose keyboard with memory components; IC2 uses LM386 integrated circuit chip; D flip-flop IC3-1 and IC3-2 use MC4013 type ; Schmidt trigger IC4 selects TC40106 type; NOR gate IC5 selects C4401 type; decimal trigger IC6 selects LD4017 type; resistors R9 and R14 take values ​​of 22 kilohms and 1.5 megohms respectively; diodes D8 and D9 use 1N4148 type ; Transistor Q5, Q6 select 2N5551 type for use; Capacitor C5 selects 0.1 microfarad for use. When a pre-set alarm situation occurs, the normally closed contact T of the probe is opened, and at this time, the memory voltage of the number storage integrated circuit IC1 (the voltage on the capacitor C1) passes through the resistor R14, the test button SY, and the no...

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PUM

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Abstract

A phone call alarm includes a master clock oscillator in the shell, an alarm trigger power-source forming unit, a circulating counting and reset unit, a circulating dialing control unit and an alarm voice control unit. It applies simple trigger and logic gate element to finishing the central control function and replacing the usually used chip microcomputer to make phone signals become the local working power source after polarity conversion.

Description

Technical field: [0001] The invention relates to a telephone alarm in the application field of electronic technology, in particular to a telephone alarm without external power supply. Background technique: [0002] The rapid development of the modern communication network makes the telephone alarm widely used in various unattended important places. The current telephone alarm in the prior art usually uses a single-chip microcomputer such as Inter8098 or Z80 as the alarm trigger and cyclic dialing control unit. Although this It can effectively complete the control function, but it will generate a large power consumption when the telephone alarm works normally. Therefore, it must be able to work normally under the condition of an external working DC power supply or a battery. Once the external power supply fails or is destroyed by man , the alarm will be disabled. Invention content: [0003] In order to overcome the shortage that the alarm must be externally connected to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M11/04
Inventor 王廷满刘勇阎振宇高峰
Owner DAQING PETROLEUM ADMINISTRATION
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