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Mute circuit for ion type smog alarm

A smoke alarm and mute circuit technology, which is applied to fire alarms, electrical components, and electronic switches that rely on smoke/gas effects, can solve problems such as increased costs and costs, and the lack of ionic smoke alarm circuits. Achieve the effects of saving purchase expenses and costs, strong practicability, and simple circuit structure

Active Publication Date: 2009-09-02
SHANGHAI BEILING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current general ion-type smoke alarm circuit does not provide this function, and needs a special integrated circuit to realize this application, which causes the user to purchase a special chip to realize this function, which increases the purchase cost and cost

Method used

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  • Mute circuit for ion type smog alarm
  • Mute circuit for ion type smog alarm

Examples

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with accompanying drawing.

[0013] see figure 1 , the figure shows a kind of mute circuit for ion smoke alarm of the present invention, comprises the mute (HUSH) key K of series connection, the first high-impedance resistor R1, triode npn, the collector and emission of triode npn The poles are respectively connected to a first sensitive terminal PIN13 and a second sensitive terminal PIN4, and an electrolytic capacitor E is also grounded between the mute key K and the first high-impedance resistor R1, and the input terminal of the mute key K is connected to a power supply voltage Vdd , in the present invention, the mute key K is a switch.

[0014] The present invention also includes a resistor R3 and a second high-resistance resistor R2, the resistor R3 is connected in series between the collector of the triode npn and the first sensitive terminal PIN13, its value range is 0-100ohm, the second high-re...

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PUM

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Abstract

The invention discloses a mute circuit for an ion type smog alarm. The mute circuit comprises a mute key, a first high-resistance resistor R1 and an audion npn which are connected in series; a collecting electrode and an emitting electrode of the audion npn are connected with a first sensitive terminal PIN13 and a second sensitive terminal PIN4 respectively; the mute key and the first high-resistance resistor R1 are earthed through an electrolytic capacitor E; and the input end of the mute key is connected with the power supply voltage Vdd. Through improvement and optimization of a peripheral circuit, the mute circuit for the ion type smog alarm is applied to the ion type smog alarm, can well realize the function of HUSH (hush) and meet the requirement of customers.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a mute circuit for ion smoke alarms. technical background [0002] Due to the activities of indoor personnel, such as cooking fumes, temporary smoking, etc., the smoke alarm will alarm, which requires the HUSH (mute) function, so that the sensitivity of the alarm is reduced for a period of time, so that the alarm is suspended. [0003] The current general ion-type smoke alarm circuit does not provide this function, and requires a special integrated circuit to realize this application, which causes the user to purchase a special chip to realize this function, which increases the purchase cost and cost. Contents of the invention [0004] The purpose of the present invention is to overcome the defects of the prior art, and provide a kind of mute circuit for ion smoke alarm, by adopting the improvement and optimization of the peripheral circuit, it is applied in the ion smoke ala...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/10H03K17/00
Inventor 陆衡周聂纪平
Owner SHANGHAI BEILING
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