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Device off hook thunder-proof method and device

A technology for lightning protection and equipment, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., can solve problems such as switch tube breakdown, telephone function failure, damage, etc. , to achieve the effect of easy realization, low cost and meeting the demand

Inactive Publication Date: 2013-07-10
FUJIAN LANDI COMML EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Select the appropriate protective device, the device can be effectively protected when the device is on-hook, but when the device is off-hook, the telephone line is subjected to (horizontal) surge signals, and it is likely to be damaged when the protective device is not turned on. It is the breakdown of the switch tube that controls the off-hook, resulting in the failure of the telephone function.

Method used

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  • Device off hook thunder-proof method and device

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments and related drawings.

[0016] The invention provides a lightning protection method for off-hook equipment, which is characterized in that: a protection circuit is provided, the input end of the protection circuit is connected to the input end of the off-hook circuit of the equipment, and the output end of the protection circuit is connected to the The off-hook signal end of the off-hook circuit is connected. When there is a momentary high voltage on the input end, the protection circuit couples the momentary high voltage to the ground and pulls the off-hook signal end low, disconnecting the off-hook circuit to protect said equipment.

[0017] Such as figure 1 As shown, the protection circuit 1 includes a capacitor C1, a transistor Q1, a resistor R1 and a resistor R2, one end of the...

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Abstract

The invention relates to the device thunder-proof field, in particular to a device off hook thunder-proof method. The device off hook thunder-proof method is characterized by providing a protection circuit, wherein an input end of the protection circuit is connected with an input end of an off hook circuit of a device, an output end of the protection circuit is connected with an off hook signal end of the off hook circuit, and when an instantaneous high voltage is applied to the input end, the protection circuit couples the instantaneous high voltage to the ground and pulls down the off hook signal end to disconnect the off hook circuit to protect the device. The device off hook thunder-proof method and device is simple in principle, easy to realize, low in cost, obvious in effect, and capable of effectively improving the thunder-proof grade of off hook of the device.

Description

technical field [0001] The invention relates to the field of lightning protection for equipment, in particular to a lightning protection method and device for off-hook equipment. Background technique [0002] With the development of electronic technology and the continuous improvement of the integration degree of electronic components, communication electronic equipment tends to be miniaturized gradually. As a result, the power supply voltage of the components is reduced, the transmitted information current is reduced, and the ability to withstand various transient overvoltages is reduced. Therefore, lightning has an increasing impact on communication electronic equipment. From the perspective of the development trend of telephones, hands-free telephones have gradually replaced mechanical switches with electronic switches for off-hook control. Compared with the mechanical switch, the electronic switch is more convenient, more reliable, and has a longer service life, and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04H04M1/74
CPCY02A30/00
Inventor 郑荣佳
Owner FUJIAN LANDI COMML EQUIP CO LTD
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