CN206195326U - Multiway switch with power supply short -circuit protect function - Google Patents
Multiway switch with power supply short -circuit protect function Download PDFInfo
- Publication number
- CN206195326U CN206195326U CN201621282207.3U CN201621282207U CN206195326U CN 206195326 U CN206195326 U CN 206195326U CN 201621282207 U CN201621282207 U CN 201621282207U CN 206195326 U CN206195326 U CN 206195326U
- Authority
- CN
- China
- Prior art keywords
- short
- power supply
- output interface
- triode
- variable connector
- 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.)
- Active
Links
Landscapes
- Protection Of Static Devices (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The utility model discloses a multiway switch with power supply short -circuit protect function, including the switch body, be provided with a plurality of DC power supply input interfaces and a plurality of DC power supply output interface on the switch body, the DC power supply input interface links to each other with satellite television, the DC power supply output interface links to each other with the tuner of antenna, short circuit detecting element and on -off control unit has still connected gradually between switch body and the DC power supply output interface. Be provided with DC power supply input interface and DC power supply output interface on the switch body, the tuner of DC power supply output interface and antenna links to each other, has still connected gradually short circuit detecting element and on -off control unit between switch body and the DC power supply output interface, and when short circuit detecting element detected the emergence short circuit, the on -off control unit made DC power supply break off, can avoid device, components and parts etc. Between multiway switch and the multiway switch to receive the damage because of the short circuit.
Description
Technical field
The utility model is related to radiofrequency signal process field, more particularly to a kind of multichannel with power source short-circuit protection function
Switch.
Background technology
Digital broadcast satellite is the most proper note of this word of global village.Into after 20th century, digital broadcast satellite TV
More into the optimal knowledge of people, amusement information source, and the frequency band of its distribution is from S frequency bands, C-band, Ku frequency bands, to carrying recently
The Ka frequency bands for going out, image analytic degree is also by SD lifting to high definition.Obtain these information, it is necessary to via some communication protocols,
Frequency band is divided, periphery auxiliary equipment, could intactly enjoy the facility that science and technology is brought.
Due to tuner output radiofrequency signal be sent between indoor satellite television receiver have one section not short away from
From typically about 30 meters to 100 meters long, and the signal transmission of this segment distance depends on the intervention of coaxial wire, and this is general
For the basic setup of single user.If being intended to allow multiple satellite television receiver users also can simultaneously share same tuner
Output radiofrequency signal, only two methods:1. a variable connector is added, referring to Fig. 1.2. design tuner is multi output form,
Referring to Fig. 2.Two ways is docked to different customer groups, method 1 be general user by the way of, and system house is then two
The method of kind is optionally arranged in pairs or groups and is used.
Anyway, existed on the coaxial wire between the output of tuner and indoor satellite television receiver straight
Stream power supply and radiofrequency signal, dc source part therein are that the phenomenon for being not allow for line short occurs, once it is short-circuited
Then one of variable connector and satellite television receiver will necessarily be damaged phenomenon, especially the more variable connector of multi-line design
Loss is bigger：If one two is entered four variable connectors that go out and damaged all the way, then whole two enter four variable connectors for going out and just can't bear to make
With, and the satellite television receiver of early stage related can also be damaged.Satellite television receiver in recent years all has been provided with short-circuit guarantor
Shield circuit, therefore satellite television receiver there is no because line short and caused by damage.However, the multichannel of prior art
Do not have short protection circuit on switch, this can bring about the risk of variable connector damage.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of with power source short-circuit protection function
Variable connector, can avoid variable connector from being damaged because of short circuit, while protecting device and first device before variable connector
Part.
The utility model solve technical scheme that its technical problem used for：It is a kind of with power source short-circuit protection function
Variable connector, including Switch main body, are provided with some DC supply input interfaces and some dc sources on the Switch main body
Output interface, the DC supply input interface is connected with satellite television receiver, the dc source output interface and antenna
Tuner be connected, be also connected with short detection unit and break-make between the Switch main body and dc source output interface in turn
Control unit.
Further, the short detection unit includes a triode Q1, and the DC supply input interface passes through filtered electrical
Hold C4, isolation resistance R2 and detection resistance R1 to be connected with the emitter-base bandgap grading of triode Q1, the collector of the triode Q1 is by a reference
Current potential resistance R3 is grounded.
Further, the on-off control unit includes a FET Q2, the gate and triode of the FET Q2
The collector of Q1 is connected, and the source electrode of the FET Q2 is connected with the base stage of triode Q1, the FET Q2 let out pole according to
Secondary the first filter capacitor C1, the second filter capacitor C2 and radio frequency choke coil L1 of passing through is connected with dc source output interface.
Further, the triode Q1 is positive-negative-positive pliotron, and the FET Q2 is MOSFET metal-oxides
Thing semiconductor field effect transistor.
Further, the DC supply input interface is provided with 4.
Further, the dc source output interface is provided with 2.
The beneficial effects of the utility model have：A kind of variable connector with power source short-circuit protection function of the utility model,
DC supply input interface and dc source output interface, dc source output interface and antenna are provided with Switch main body
Tuner is connected, and is also connected with short detection unit between Switch main body and dc source output interface in turn and break-make control is single
Unit, when short detection unit is detected to be short-circuited, on-off control unit causes that dc source disconnects, and multichannel can be avoided to open
Device, component between pass and variable connector etc. are damaged because of short circuit.
Brief description of the drawings
Below in conjunction with the accompanying drawings and specific embodiment the utility model is described in further detail, wherein：
Fig. 1 is the schematic diagram by the shared tuner signal of variable connector；
Fig. 2 is the schematic diagram for tuner being set to multi output form；
Fig. 3 is module diagram of the present utility model；
Fig. 4 is circuit theory diagrams of the present utility model.
Specific embodiment
Referring to Fig. 3, a kind of variable connector with power source short-circuit protection function of the utility model, including Switch main body 1, institute
State and some DC supply input interfaces 2 and some dc source output interfaces 3, the dc source are provided with Switch main body 1
Input interface 2 is connected with satellite television receiver, and the dc source output interface 3 is connected with the tuner 4 of antenna, described to open
Close and be also connected with short detection unit 5 and on-off control unit 6 in turn between body 1 and dc source output interface 3.It is any straight
After stream power input is via variable connector selection circuit, into short detection unit 5, if dc source output interface 3 is without short
Road phenomenon is produced, then dc source will directly be supplied to the height of antenna by on-off control unit 6 to dc source output interface 3
The first 4 enough power supplys of frequency.If conversely, dc source is before short detection unit 5 is entered or is entering short-circuit detecting list
While first, dc source output interface 3 has short circuit phenomenon, will start short detection unit 5 and then turns off break-make control
The path of unit 6, so as to protect the device and component before variable connector.
Referring to Fig. 4, the short detection unit 5 includes a triode Q1, and the DC supply input interface 2 is by filtering
Electric capacity C4, isolation resistance R2 and detection resistance R1 are connected with the emitter-base bandgap grading of triode Q1, and the collector of the triode Q1 is by a ginseng
Examine current potential resistance R3 ground connection.The on-off control unit 6 includes a FET Q2, the gate of the FET Q2 and three poles
The collector of pipe Q1 is connected, and the source electrode of the FET Q2 is connected with the base stage of triode Q1, and the FET Q2's lets out pole
The first filter capacitor C1, the second filter capacitor C2 and radio frequency choke coil L1 is passed sequentially through to be connected with dc source output interface 3.
When short protection circuit is normal, dc source enters via filter capacitor C4, isolation resistance R2, detection resistance R1
The triode Q1 of short detection unit 5, because dc source output interface 3 is not abnormal, therefore detection resistance R1 and no-voltage
Poor generation, the EC interfaces of triode Q1 produce voltage, therefore FET not over electric current on reference potential resistance R3
Q2 is in DS gate all-pass, so that by enough dc sources via the first filter capacitor C1, the second filter capacitor C2 and radio frequency
Choking-winding L1 powers to dc source output interface 3.
When be short-circuited phenomenon and then short protection circuit start, dc source is via filter capacitor C4, isolation resistance
R2, detection resistance R1 enter the triode Q1 of short detection unit 5, before this or the same time, if dc source is exported
Interface 3 has short circuit phenomenon, the generation for having voltage difference due to detection resistance R1, and the EC interfaces of triode Q1 will be by milliampere
The electric current of level, produces voltage, therefore FET Q2 shut-off DS gate, so as to dc source be existed on reference potential resistance R3
Given before D pin position and disconnected, and direct it to GS interfaces and form current limliting load, so as to protect device and the unit before variable connector
Device, also avoids variable connector from being damaged because of short circuit.Meanwhile, after the short circuit phenomenon of dc source output interface 3 is excluded,
Restore electricity once again normal, therefore this has the not disposable running stores of variable connector of port power short-circuit protection, but
One reusable design.Wherein, in triode Q1, E represents emitter-base bandgap grading, and B represents base stage, and C represents collector；Scene effect
In pipe Q2, G represents gate, and D is represented and let out pole, and S represents source electrode.
Used as preferred embodiments of the present utility model, the triode Q1 is positive-negative-positive pliotron, the field-effect
Pipe Q2 is MOSFET Metal-Oxide Semiconductor field-effect transistors.
Further, as preferred embodiments of the present utility model, the DC supply input interface 2 is provided with 4, institute
State dc source output interface 3 and be provided with 2.
The above, simply better embodiment of the present utility model, but the utility model is not limited to above-mentioned reality
Example is applied, as long as it reaches technique effect of the present utility model with any same or similar means, should all belong to of the present utility model
Protection domain.
Claims (6)
1. a kind of variable connector with power source short-circuit protection function, it is characterised in that：Including Switch main body（1）, the switch
Body（1）On be provided with some DC supply input interfaces（2）With some dc source output interfaces（3）, the dc source
Input interface（2）It is connected with satellite television receiver, the dc source output interface（3）With the tuner of antenna（4）It is connected,
The Switch main body（1）With dc source output interface（3）Between be also connected with short detection unit in turn（5）With break-make control
Unit（6）.
2. a kind of variable connector with power source short-circuit protection function according to claim 1, it is characterised in that：It is described short
Road detection unit（5）Including a triode Q1, the DC supply input interface（2）By filter capacitor C4, isolation resistance R2
It is connected with detection resistance R1 with the emitter-base bandgap grading of triode Q1, the collector of the triode Q1 is grounded by a reference potential resistance R3.
3. a kind of variable connector with power source short-circuit protection function according to claim 2, it is characterised in that：It is described logical
Disconnected control unit（6）Including a FET Q2, the gate of the FET Q2 is connected with the collector of triode Q1, the field
The source electrode of effect pipe Q2 is connected with the base stage of triode Q1, and the pole of letting out of the FET Q2 passes sequentially through the first filter capacitor
C1, the second filter capacitor C2 and radio frequency choke coil L1 and dc source output interface（3）It is connected.
4. a kind of variable connector with power source short-circuit protection function according to claim 3, it is characterised in that：Described three
Pole pipe Q1 is positive-negative-positive pliotron, and the FET Q2 is MOSFET Metal-Oxide Semiconductor field-effect transistors.
5. a kind of variable connector with power source short-circuit protection function according to claim 1, it is characterised in that：It is described straight
Stream power input interface（2）It is provided with 4.
6. a kind of variable connector with power source short-circuit protection function according to claim 1, it is characterised in that：It is described straight
Stream power output interface（3）It is provided with 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621282207.3U CN206195326U (en) | 2016-11-25 | 2016-11-25 | Multiway switch with power supply short -circuit protect function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621282207.3U CN206195326U (en) | 2016-11-25 | 2016-11-25 | Multiway switch with power supply short -circuit protect function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206195326U true CN206195326U (en) | 2017-05-24 |
Family
ID=58724089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621282207.3U Active CN206195326U (en) | 2016-11-25 | 2016-11-25 | Multiway switch with power supply short -circuit protect function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206195326U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614445A (en) * | 2022-04-19 | 2022-06-10 | Oppo广东移动通信有限公司 | Short-circuit protection circuit, control method and electronic equipment |
-
2016
- 2016-11-25 CN CN201621282207.3U patent/CN206195326U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614445A (en) * | 2022-04-19 | 2022-06-10 | Oppo广东移动通信有限公司 | Short-circuit protection circuit, control method and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104702879A (en) | Rear end and front end processing circuits and coaxial power supply circuit | |
| CN106571848A (en) | Microwave frequency conversion circuit and frequency converter | |
| US20140269952A1 (en) | Powerline communication adapter for powerline communication systems | |
| CN106464297A (en) | A surge protector for a transceiver | |
| CN206195326U (en) | Multiway switch with power supply short -circuit protect function | |
| CN106231491B (en) | It is a kind of to eliminate the method for extracting power down POP sound | |
| CN106526403A (en) | Terminal leak current detection circuit, terminal and terminal leak current detection system | |
| CA2703071C (en) | Ac mains filter and power supply system | |
| CN205378057U (en) | Circuit arrangement who restraines audio signal transmission noise | |
| CN105933627A (en) | Tuner circuit | |
| CN103684344B (en) | The transconductance circuit that corner frequency is adjustable | |
| CN207399376U (en) | A kind of multi-channel switch with function of power protection | |
| CN206149260U (en) | Microwave frequency conversion circuit and converter | |
| CN104935993B (en) | DTV WIFI/EOC filter control circuits and control method | |
| CN104639147A (en) | Interface multiplexing circuit and device | |
| US20100289566A1 (en) | Amplitude AC noise filter with universal IEC connection | |
| CN205105382U (en) | Circuit of eliminating earphone plug POP sound reaches electronic equipment including this circuit | |
| CN107820028A (en) | A kind of multi-channel switch with function of power protection | |
| CN205864075U (en) | A kind of active power distribution network intelligent terminal's accumulator isolation monitoring device | |
| CN206490464U (en) | Portable power source charging device | |
| CN104994320A (en) | HDMI service equipment | |
| CN205753343U (en) | A kind of can the high-speed interface protection circuit of self adaptation break-make | |
| CN204377023U (en) | There is the ground of USB interface, cable digital TV tuner | |
| CN104092921B (en) | Multi-channel video signal transacting hydrid integrated circuit | |
| CN218603142U (en) | Branching type single-circuit double-conductor circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |