CN203233175U - Interference-protection circuit for radio port - Google Patents
Interference-protection circuit for radio port Download PDFInfo
- Publication number
- CN203233175U CN203233175U CN 201320261724 CN201320261724U CN203233175U CN 203233175 U CN203233175 U CN 203233175U CN 201320261724 CN201320261724 CN 201320261724 CN 201320261724 U CN201320261724 U CN 201320261724U CN 203233175 U CN203233175 U CN 203233175U
- Authority
- CN
- China
- Prior art keywords
- resistance
- protection circuit
- effect transistor
- type field
- field effect
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an interference-protection circuit for a radio port, and the interference-protection circuit comprises a power port of a radio. The power port is connected with an electrostatic protection circuit and a surge-protection circuit. The surge-protection circuit is connected with a surge-protection circuit. The electrostatic protection circuit comprises a resistor R4, a resistor R5, a P-type field-effect transistor, an N-type field-effect transistor, and a zener diode. The surge-protection circuit comprises a varistor R1, a transient -voltage-suppression diode D1, and an inductor. The interference-protection circuit is advantageous by having a simple structure, and capable of being used for discharging static and surge which act on the radio in order to avoid that the surge and static break electronic components inside the radio and improve anti-interference of the radio.
Description
Technical field
The utility model relates to integrated circuit (IC) design, relates to a kind of interference prevention circuit that can be used for the broadcast receiver port in particular.
Background technology
Electronic devices and components integrated on the circuit board of wireless inside are more, and are responsive electronic devices and components mostly.The antijamming capability of responsive electronic devices and components is relatively poor, and it is more to influence the factor of these responsive electronic devices and components, for example: surge, static etc.Surge mainly refers to the strong pulse that produces at that moment that power supply just opened, and he makes circuit the burning out in a flash of surge probably, punctures as PN junction electric capacity, and resistance blows etc.Its general surge protection circuit only is sized capacitors in parallel or series inductance, and still, in some cases, it can not release surge to fall fully.Broadcast receiver all is portable mostly, and in the season of autumn and winter drying, human body has static mostly, and static electricity on human body's release is very strong to the destructive power of broadcast receiver internal electronic component.
The utility model content
The utility model provides a kind of interference prevention circuit that can be used for the broadcast receiver port, its circuit structure is simple, can release to acting on wireless static and surge, to avoid surge and static wireless internal electronic component be damaged, wireless antijamming capability is strengthened.
For solving above-mentioned technical problem, the utility model by the following technical solutions:
The interference prevention circuit that can be used for the broadcast receiver port, it comprises wireless power port, described power port place is connected with electrostatic discharge protection circuit and surge protection circuit, described surge protection circuit is connected on the surge protection circuit, described surge protection circuit comprises piezo-resistance R1, Transient Suppression Diode D1 and inductance, the two ends of described inductance link to each other with the negative pole of resistance with Transient Suppression Diode D1 respectively, the positive pole of described Transient Suppression Diode D1 is connected piezo-resistance R1 upward and while ground connection, described electrostatic discharge protection circuit comprises resistance R 4, resistance R 5, P type field effect transistor, the N-type field effect transistor, with voltage stabilizing didoe D2,5 series connection of described resistance R 4 and resistance R and two ends are connected in the drain electrode of the drain electrode of P type field effect transistor and N-type field effect transistor, the source electrode of described P type field effect transistor connect VDD and simultaneously with its grid, the negative pole of voltage stabilizing didoe D2 links to each other, the source ground of described N-type field effect transistor and simultaneously with its grid, voltage stabilizing didoe D2 links to each other, and the negative pole of described Transient Suppression Diode D1 is connected between resistance R 4 and the resistance R 5.The end ground connection of the piezo-resistance R1 of surge protection circuit, when the voltage at its two ends during greater than certain value, its resistance diminishes, thus leakage current.Inductance impact electric current produces the reverse induction electric current, offsets the part percussion, when the voltage at Transient Suppression Diode D1 two ends during greater than certain value, and its rapid conducting, thereby leakage current.The resistance R 4 of electrostatic discharge protection circuit, resistance R 5, P type field effect transistor, N-type field effect transistor and voltage stabilizing didoe D2 provide many paths for static electricity release; voltage stabilizing didoe D2 also plays the effect of protection P type field effect transistor and N-type field effect transistor, and resistance R 4, resistance R 5 can prevent effectively that power supply is to the perturbation of electrostatic discharge protection circuit.The circuit structure of entire circuit is simple, and the electronic devices and components that adopt are common electronic devices and components, more easily finds on market.
Further technical scheme is:
As preferably, described surge protection circuit also comprises resistance R 2 and is connected the electric capacity of resistance R 2 one ends that the other end of described resistance R 2 is connected between piezo-resistance R1 and the inductance, the other end ground connection of described electric capacity.Resistance R 2 and inductance play cushioning effect, also can filter high-frequency signal.
As preferably, described electrostatic discharge protection circuit also comprises resistance R 3, on the two ends of described resistance R 3 are connected between negative pole, resistance R 4 and the resistance R 5 of Transient Suppression Diode D1.Resistance R 3 can play current limliting, and its resistance should be big as much as possible, and electric current is excessive to damage the broadcast receiver internal circuit to avoid.
Further, the resistance of described resistance R 4 and resistance R 5 equates.
Further, the Standard resistance range of described resistance R 4 is 2 kilohms to 5 kilohms.
Compared with prior art, the beneficial effects of the utility model are:
1, circuit of the present utility model adopts resistance, inductance, electric capacity, field effect transistor and diode, and it is electronic devices and components common on the market, and is cheap, makes wireless cost can not increase too much.
2, circuit of the present utility model can be released to acting on wireless static and surge, effectively protects wireless internal circuit, and wireless antijamming capability is strengthened.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.Execution mode of the present utility model includes but not limited to the following example.
[embodiment]
The interference prevention circuit that can be used for the broadcast receiver port as shown in Figure 1, it comprises wireless power port, described power port place is connected with electrostatic discharge protection circuit and surge protection circuit, described surge protection circuit is connected on the surge protection circuit, described surge protection circuit comprises piezo-resistance R1, Transient Suppression Diode D1 and inductance, the two ends of described inductance link to each other with the negative pole of resistance with Transient Suppression Diode D1 respectively, the positive pole of described Transient Suppression Diode D1 is connected piezo-resistance R1 upward and while ground connection, described electrostatic discharge protection circuit comprises resistance R 4, resistance R 5, P type field effect transistor, the N-type field effect transistor, with voltage stabilizing didoe D2,5 series connection of described resistance R 4 and resistance R and two ends are connected in the drain electrode of the drain electrode of P type field effect transistor and N-type field effect transistor, the source electrode of described P type field effect transistor connect VDD and simultaneously with its grid, the negative pole of voltage stabilizing didoe D2 links to each other, the source ground of described N-type field effect transistor and simultaneously with its grid, voltage stabilizing didoe D2 links to each other, and the negative pole of described Transient Suppression Diode D1 is connected between resistance R 4 and the resistance R 5.
Described surge protection circuit also comprises resistance R 2 and is connected the electric capacity of resistance R 2 one ends that the other end of described resistance R 2 is connected between piezo-resistance R1 and the inductance, the other end ground connection of described electric capacity.
Described electrostatic discharge protection circuit also comprises resistance R 3, on the two ends of described resistance R 3 are connected between negative pole, resistance R 4 and the resistance R 5 of Transient Suppression Diode D1.
The resistance of described resistance R 4 and resistance R 5 equates.
The Standard resistance range of described resistance R 4 is 2 kilohms to 5 kilohms.
Be embodiment of the present utility model as mentioned above.The utility model is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, all fall within the protection range of the present utility model.
Claims (5)
1. the interference prevention circuit that can be used for the broadcast receiver port, it is characterized in that: it comprises wireless power port, described power port place is connected with electrostatic discharge protection circuit and surge protection circuit, described surge protection circuit is connected on the surge protection circuit, described surge protection circuit comprises piezo-resistance R1, Transient Suppression Diode D1 and inductance, the two ends of described inductance link to each other with the negative pole of resistance with Transient Suppression Diode D1 respectively, the positive pole of described Transient Suppression Diode D1 is connected piezo-resistance R1 upward and while ground connection, described electrostatic discharge protection circuit comprises resistance R 4, resistance R 5, P type field effect transistor, the N-type field effect transistor, with voltage stabilizing didoe D2,5 series connection of described resistance R 4 and resistance R and two ends are connected in the drain electrode of the drain electrode of P type field effect transistor and N-type field effect transistor, the source electrode of described P type field effect transistor connect VDD and simultaneously with its grid, the negative pole of voltage stabilizing didoe D2 links to each other, the source ground of described N-type field effect transistor and simultaneously with its grid, voltage stabilizing didoe D2 links to each other, and the negative pole of described Transient Suppression Diode D1 is connected between resistance R 4 and the resistance R 5.
2. the interference prevention circuit that can be used for the broadcast receiver port according to claim 1, it is characterized in that: described surge protection circuit also comprises resistance R 2 and is connected the electric capacity of resistance R 2 one ends, the other end of described resistance R 2 is connected between piezo-resistance R1 and the inductance, the other end ground connection of described electric capacity.
3. the interference prevention circuit that can be used for the broadcast receiver port according to claim 1, it is characterized in that: described electrostatic discharge protection circuit also comprises resistance R 3, on the two ends of described resistance R 3 are connected between negative pole, resistance R 4 and the resistance R 5 of Transient Suppression Diode D1.
4. the interference prevention circuit that can be used for the broadcast receiver port according to claim 3 is characterized in that: the resistance of described resistance R 4 and resistance R 5 equates.
5. the interference prevention circuit that can be used for the broadcast receiver port according to claim 4, it is characterized in that: the Standard resistance range of described resistance R 4 is 2 kilohms to 5 kilohms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320261724 CN203233175U (en) | 2013-05-15 | 2013-05-15 | Interference-protection circuit for radio port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320261724 CN203233175U (en) | 2013-05-15 | 2013-05-15 | Interference-protection circuit for radio port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203233175U true CN203233175U (en) | 2013-10-09 |
Family
ID=49289279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320261724 Expired - Fee Related CN203233175U (en) | 2013-05-15 | 2013-05-15 | Interference-protection circuit for radio port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203233175U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810819A (en) * | 2015-04-30 | 2015-07-29 | 成都锐奕信息技术有限公司 | Charging device with surge protection |
| CN107968089A (en) * | 2017-12-20 | 2018-04-27 | 广东美的制冷设备有限公司 | Electrostatic discharge protection circuit, IC chip and household electrical appliance |
-
2013
- 2013-05-15 CN CN 201320261724 patent/CN203233175U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810819A (en) * | 2015-04-30 | 2015-07-29 | 成都锐奕信息技术有限公司 | Charging device with surge protection |
| CN107968089A (en) * | 2017-12-20 | 2018-04-27 | 广东美的制冷设备有限公司 | Electrostatic discharge protection circuit, IC chip and household electrical appliance |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104218558B (en) | Anti-surging high tension protection circuit | |
| CN103683255A (en) | Starting-up anti-surge circuit | |
| CN203326653U (en) | Solar energy storage battery charging circuit | |
| CN203233175U (en) | Interference-protection circuit for radio port | |
| CN203233159U (en) | MP3 player with electrostatic protection and surge protection | |
| CN203233162U (en) | Surge protection device | |
| CN103248381A (en) | Radio with storm surge protection function | |
| CN203205866U (en) | Antistatic circuit for mobile phone interface | |
| CN203233158U (en) | Circuit with surge protection and electrostatic protection | |
| CN203233171U (en) | Interference-protection MP4 player | |
| CN103248029A (en) | Surge protector with simple structure | |
| CN203233161U (en) | Mobile phone with surge protection and electrostatic protection | |
| CN203233405U (en) | Surge-protection radio | |
| CN203232871U (en) | Electrostatic protection circuit for IO port of USB flash disk | |
| CN203205065U (en) | DVD player having anti-lightning function | |
| CN208890636U (en) | Power supply over-voltage spike detection circuit | |
| CN203233166U (en) | Anti-surge protector for radio | |
| CN203206325U (en) | Mobile phone having lightning protection function | |
| CN203233174U (en) | Lightning protector applicable to high-voltage environment | |
| CN103248036A (en) | Turn-on anti-surge protector for radio interface | |
| CN205124090U (en) | A high power factor regulator circuit for passive LED drive circuit | |
| CN204649798U (en) | One prevents aircraft bombing circuit | |
| CN204349411U (en) | The earth leakage protective IC interior biasing circuit of anti-transient impact | |
| CN103248030A (en) | MP4 player with interference prevention function | |
| CN209088539U (en) | Extend the protection circuit structure of metal-oxide-semiconductor service life |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20140515 |