CN103199517A - Device off hook thunder-proof method and device - Google Patents
Device off hook thunder-proof method and device Download PDFInfo
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- CN103199517A CN103199517A CN2013100943716A CN201310094371A CN103199517A CN 103199517 A CN103199517 A CN 103199517A CN 2013100943716 A CN2013100943716 A CN 2013100943716A CN 201310094371 A CN201310094371 A CN 201310094371A CN 103199517 A CN103199517 A CN 103199517A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
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
The present invention relates to equipment lightning protection field, especially a kind of equipment off-hook lightning-protection method and device.
Background technology
Along with development of electronic technology, the improving constantly of the integrated degree of electronic devices and components, communication electronic equipment progressively is tending towards miniaturization.Make the supply power voltage of components and parts reduce thus, the information electric current of transmission reduces, for the ability to bear reduction of various temporary overvoltages.So thunder and lightning is increasing to the influence of communication electronic equipment.From the development trend of telephone set, hand-free telephone replaces with electronic switch progressively that mechanical switch is plucked, on-hook control.Electronic switch is than mechanical switch is convenient, reliability is high, the life-span is long, and when the phone hand-free call is changed hands the handle conversation, can change automatically, do not need secondary by Hands-free key.It is convenient especially that these advantages use telephone set, but this also makes the internal circuit of such telephone set and outside line not disconnect effectively, causes the anti-lightning strike ability of this telephone set to reduce.
Telephony port lightning protection scheme generally only adopts semiconductor discharge tube or piezo-resistance to realize at present.Select suitable protective device; equipment can effectively be protected under the state of on-hook; but under the equipment off-hook condition; suffer (laterally) surging signal on the telephone wire; when opening protection, protective device has not been damaged probably; the switching tube that generally is the control off-hook punctures, and causes telephony feature to lose efficacy.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of equipment off-hook lightning-protection method and device, protection equipment can be avoided the damage of surging signal equally under off-hook condition.
The present invention adopts following scheme to realize: a kind of equipment off-hook lightning-protection method; it is characterized in that: a protective circuit is provided; the input of described protective circuit is connected with the input of the circuit for answering of equipment; the output of described protective circuit is connected with the off hook signal end of described circuit for answering; when high pressure is arranged on the input in a flash; described protective circuit is coupled to ground with described instantaneous pressure and described off hook signal end is dragged down, and protects described equipment in order to disconnect described circuit for answering.
In an embodiment of the present invention, described protective circuit comprises a capacitor C 1, a triode Q1, a resistance R 1 and a resistance R 2, and an end of described capacitor C 1 is as the input of described protective circuit, and the other end of described capacitor C 1 connects an end of described resistance R 1; The other end of described resistance R 1 connects the base stage of an end and the described triode Q1 of described resistance R 2; The other end ground connection of described resistance R 2 also connects the emitter of described triode Q1; The collector electrode of described triode Q1 is as the output of described protective circuit.
In an embodiment of the present invention, described capacitor C 1 is used for described instantaneous pressure is coupled to ground, and described triode Q1 is used for described off hook signal end is dragged down.
In an embodiment of the present invention, described circuit for answering comprises a triode Q2, a triode Q3, a triode Q4, the emitter of described triode Q2 is connected to the base stage of described triode Q3 as the input of described circuit for answering and the resistance R 3 of connecting, the collector electrode of described triode Q2 is as the output of described circuit for answering and connect the collector electrode of described triode Q3, and the base stage of described triode Q2 connects the emitter of described triode Q3; The base stage of the described triode Q3 resistance R 4 of connecting is connected to the collector electrode of described triode Q4, and the base stage of described triode Q4 is connected to ground, the grounded emitter of described triode Q4 as the off hook signal end of described circuit for answering and the resistance R 5 of connecting.
In an embodiment of the present invention, described equipment is telephone POS or common fixed line machine.
The present invention also provides a kind of equipment off-hook lightning protection device, it is characterized in that: comprise a capacitor C 1, a triode Q1, a resistance R 1 and a resistance R 2, one end of described capacitor C 1 is as the input of described device, and the other end of described capacitor C 1 connects an end of described resistance R 1; The other end of described resistance R 1 connects the base stage of an end and the described triode Q1 of described resistance R 2; The other end ground connection of described resistance R 2 also connects the emitter of described triode Q1; The collector electrode of described triode Q1 is as the output of described device.
In an embodiment of the present invention, described equipment is telephone POS or common fixed line machine.
The principle of the invention is simple, realize easily, and cost is low, and effect is remarkable, can effectively improve the lightning protection grade of equipment off-hook.The present invention's maturation is applied in the actual engineering, and is respond well, can satisfy the demands.
Description of drawings
Fig. 1 is the circuit theory diagrams of the present invention's protective circuit and circuit for answering when being applied to telephone set.
Fig. 2 is the circuit theory diagrams of a kind of equipment off-hook of the present invention lightning protection device.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below will the present invention be described in further detail by specific embodiment and relevant drawings.
The invention provides a kind of equipment off-hook lightning-protection method; it is characterized in that: a protective circuit is provided; the input of described protective circuit is connected with the input of the circuit for answering of equipment; the output of described protective circuit is connected with the off hook signal end of described circuit for answering; when high pressure is arranged on the input in a flash; described protective circuit is coupled to ground with described instantaneous pressure and described off hook signal end is dragged down, and disconnects described circuit for answering to protect described equipment.
As shown in Figure 1, described protective circuit 1 comprises a capacitor C 1, a triode Q1, a resistance R 1 and a resistance R 2, and an end of described capacitor C 1 is as the input of described protective circuit 1, and the other end of described capacitor C 1 connects an end of described resistance R 1; The other end of described resistance R 1 connects the base stage of an end and the described triode Q1 of described resistance R 2; The other end ground connection of described resistance R 2 also connects the emitter of described triode Q1; The collector electrode of described triode Q1 connects the off hook signal end HOOK of described circuit for answering 2 as the output of described protective circuit 1; Described circuit for answering 2 comprises a triode Q2, a triode Q3, a triode Q4, the emitter of described triode Q2 is connected to the base stage of described triode Q3 as the input of described circuit for answering 2 and the resistance R 3 of connecting, the collector electrode of described triode Q2 is as the output of described circuit for answering and connect the collector electrode of described triode Q3, and the base stage of described triode Q2 connects the emitter of described triode Q3; The base stage of the described triode Q3 resistance R 4 of connecting is connected to the collector electrode of described triode Q4, and the base stage of described triode Q4 is connected to ground, the grounded emitter of described triode Q4 as the off hook signal end HOOK of described circuit for answering 2 and the resistance R 5 of connecting.The signal of equipment is exported from the output of described circuit for answering 2 then from the input input of described circuit for answering 2.In the present embodiment, described equipment is telephone POS or common fixed line machine.
Described capacitor C 1 is used for described instantaneous pressure is coupled to ground, and described triode Q1 is used for described off hook signal end is dragged down.
The present invention is mainly used in the telephone POS; when telephone POS is in off hook state; the off hook signal end HOOK of telephone POS provides a voltage to make triode Q4 conducting; thereby make triode Q2 and Q3 conducting; thereby reach the function of off-hook conversation; when high pressure (as thunderbolt) is arranged on the signal end of telephone POS in a flash; by resistance-capacitance coupling instantaneous pressure is coupled in the protective circuit; make the triode Q1 of protective circuit saturated; thereby base stage moment of the triode Q4 of circuit for answering is dragged down; thereby make triode Q2 and Q3 effectively be in cut-off state, the high pressure (thunder-strike current) that is unlikely to moment flows through from the CE utmost point of triode Q2 and burns telephone POS.
As shown in Figure 2, present embodiment provides a kind of equipment off-hook lightning protection device, it is characterized in that: comprise a capacitor C 21, a triode Q21, a resistance R 21 and a resistance R 22, one end of described capacitor C 21 is as the input of described device, and the other end of described capacitor C 21 connects an end of described resistance R 21; The other end of described resistance R 21 connects the base stage of an end and the described triode Q21 of described resistance R 22; The other end ground connection of described resistance R 22 also connects the emitter of described triode Q21; The collector electrode of described triode Q21 is as the output of described device.
Above-listed preferred embodiment; the purpose, technical solutions and advantages of the present invention are further described; institute is understood that; the above only is preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. equipment off-hook lightning-protection method; it is characterized in that: a protective circuit is provided; the input of described protective circuit is connected with the input of the circuit for answering of equipment; the output of described protective circuit is connected with the off hook signal end of described circuit for answering; when high pressure is arranged on the input in a flash; described protective circuit is coupled to ground with described instantaneous pressure and described off hook signal end is dragged down, and protects described equipment in order to disconnect described circuit for answering.
2. a kind of equipment off-hook lightning-protection method according to claim 1, it is characterized in that: described protective circuit comprises a capacitor C 1, a triode Q1, a resistance R 1 and a resistance R 2, one end of described capacitor C 1 is as the input of described protective circuit, and the other end of described capacitor C 1 connects an end of described resistance R 1; The other end of described resistance R 1 connects the base stage of an end and the described triode Q1 of described resistance R 2; The other end ground connection of described resistance R 2 also connects the emitter of described triode Q1; The collector electrode of described triode Q1 is as the output of described protective circuit.
3. a kind of equipment off-hook lightning-protection method according to claim 2 is characterized in that: described capacitor C 1 is used for described instantaneous pressure is coupled to ground, and described triode Q1 is for described off hook signal end is dragged down.
4. a kind of equipment off-hook lightning-protection method according to claim 1, it is characterized in that: described circuit for answering comprises a triode Q2, a triode Q3, a triode Q4, the emitter of described triode Q2 is connected to the base stage of described triode Q3 as the input of described circuit for answering and the resistance R 3 of connecting, the collector electrode of described triode Q2 is as the output of described circuit for answering and connect the collector electrode of described triode Q3, and the base stage of described triode Q2 connects the emitter of described triode Q3; The base stage of the described triode Q3 resistance R 4 of connecting is connected to the collector electrode of described triode Q4, and the base stage of described triode Q4 is connected to ground, the grounded emitter of described triode Q4 as the off hook signal end of described circuit for answering and the resistance R 5 of connecting.
5. a kind of equipment off-hook lightning-protection method according to claim 1, it is characterized in that: described equipment is telephone POS or common fixed line machine.
6. equipment off-hook lightning protection device, it is characterized in that: comprise a capacitor C 1, a triode Q1, a resistance R 1 and a resistance R 2, one end of described capacitor C 1 is as the input of described device, and the other end of described capacitor C 1 connects an end of described resistance R 1; The other end of described resistance R 1 connects the base stage of an end and the described triode Q1 of described resistance R 2; The other end ground connection of described resistance R 2 also connects the emitter of described triode Q1; The collector electrode of described triode Q1 is as the output of described device.
7. a kind of equipment off-hook lightning protection device according to claim 6, it is characterized in that: described equipment is telephone POS or common fixed line machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100943716A CN103199517A (en) | 2013-03-23 | 2013-03-23 | Device off hook thunder-proof method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100943716A CN103199517A (en) | 2013-03-23 | 2013-03-23 | Device off hook thunder-proof method and device |
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| Publication Number | Publication Date |
|---|---|
| CN103199517A true CN103199517A (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100943716A Pending CN103199517A (en) | 2013-03-23 | 2013-03-23 | Device off hook thunder-proof method and device |
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| CN (1) | CN103199517A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1195248A (en) * | 1998-02-16 | 1998-10-07 | 杨根云 | Telephone with telephone rate display |
| CN1233129A (en) * | 1998-03-12 | 1999-10-27 | 赛霸创力有限公司 | Telephone network business operation prompt, soft key operation and protection against surge voltage |
| US6563924B1 (en) * | 1998-08-25 | 2003-05-13 | Samsung Electronics Co., Ltd. | Subscriber matching circuit for electronic exchange |
-
2013
- 2013-03-23 CN CN2013100943716A patent/CN103199517A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1195248A (en) * | 1998-02-16 | 1998-10-07 | 杨根云 | Telephone with telephone rate display |
| CN1233129A (en) * | 1998-03-12 | 1999-10-27 | 赛霸创力有限公司 | Telephone network business operation prompt, soft key operation and protection against surge voltage |
| US6563924B1 (en) * | 1998-08-25 | 2003-05-13 | Samsung Electronics Co., Ltd. | Subscriber matching circuit for electronic exchange |
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Application publication date: 20130710 |