CN201336690Y - Power supply circuit capable of being identified automatically through television antenna - Google Patents
Power supply circuit capable of being identified automatically through television antenna Download PDFInfo
- Publication number
- CN201336690Y CN201336690Y CNU2009200512042U CN200920051204U CN201336690Y CN 201336690 Y CN201336690 Y CN 201336690Y CN U2009200512042 U CNU2009200512042 U CN U2009200512042U CN 200920051204 U CN200920051204 U CN 200920051204U CN 201336690 Y CN201336690 Y CN 201336690Y
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- CN
- China
- Prior art keywords
- circuit
- power supply
- output
- amplifier
- alternating current
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- 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
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Details Of Television Systems (AREA)
Abstract
The utility model relates to a power supply circuit capable of being identified through a television antenna, which is characterized by the inclusion of an alternating-current (AC) circuit and a direct-current (DC) circuit. The AC circuit comprises a capacitor (C3); the DC circuit comprises an inductor (L1), a diode (D1) and two capacitors (C1 and C2); one end of the DC circuit is connected with the voltage input terminal of a signal amplifier; television signals are output from the output terminal of the signal amplifier through the AC circuit and a coaxial cable; and voltage signals input via the coaxial cable are input to the voltage input terminal of the amplifier through the DC circuit. The power supply circuit adopts an active antenna without an external transformer; and the utility model has the advantages of simple circuit, safe and convenient use as well as stable and reliable power supply of set-top boxes.
Description
Technical field
The utility model relates to a kind of power supply circuits of antenna, particularly relates to a kind of television antenna and discerns power supply circuits automatically.
Background technology
Terrestrial DTV constantly develops at present, more and more people use the terrestrial DTV set-top box, nearly all terrestrial DTV set-top box all can provide the power supply function of supplying power, but a lot of active antennas use external transformer, the shortcoming of bringing like this is: external transformer line trouble, and use inconvenience dangerous again.The position that antenna is put is restricted because of the supply socket position.The transformer-supplied instability influences signal quality.
Summary of the invention
The purpose of this utility model: use active antenna not need external transformer, circuit is simple, safety again easy to use, and the set-top box power supply is stable.
For achieving the above object, the utility model adopts following technical scheme:
A kind of television antenna is discerned power supply circuits automatically, it is characterized in that comprising: an alternating current circuit and a DC circuit, described alternating current circuit is made up of a capacitor C 3, alternating current circuit one termination signal amplifier output, another termination coaxial line, described DC circuit is by an inductance L 1, a diode D1 and two capacitor C 1, C2 forms, DC circuit one termination signal amplifier voltage input end, the TV signal of the output output of amplifier signal is through alternating current circuit, through coaxial cable output, the voltage signal of coaxial cable input is input to the amplifier voltage input end through DC circuit again.
The beneficial effects of the utility model: use active antenna not need external transformer, circuit is simple, safety again easy to use, and the set-top box power supply is reliable and stable.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model.
Wherein, Reference numeral:
201, coaxial cable;
202, alternating current circuit;
203, DC circuit;
204, amplifier signal output;
205, amplifier voltage input end.
Embodiment
With reference to Fig. 1, Fig. 2 as can be seen the utility model comprise: an alternating current circuit 202 and a DC circuit 203.Described alternating current circuit is made up of a capacitor C 3, alternating current circuit one termination signal amplifier output 204, another termination coaxial line 201.Described DC circuit is formed DC circuit one termination signal amplifier voltage input end 205 by an inductance L 1, a diode D1 and two capacitor C 1, C2.The TV signal of output 204 outputs of amplifier signal is through alternating current circuit 202, again through coaxial cable 201 outputs.The voltage signal of coaxial cable 201 inputs is input to the amplifier voltage input end through DC circuit 203.
TV signal output is used same coaxial line transmission with the input of amplifier voltage, and does not influence mutually.
Realize the function of foregoing circuit, also require to use to have the set-top box of antenna function of supplying power, and television antenna and set-top box will be used, promptly set-top box tuner output voltage will meet the input voltage of television antenna.
Claims (1)
1, a kind of television antenna is discerned power supply circuits automatically, it is characterized in that comprising: an alternating current circuit and a DC circuit, described alternating current circuit is made up of a capacitor C 3, alternating current circuit one termination signal amplifier output, another termination coaxial line, described DC circuit is by an inductance L 1, a diode D1 and two capacitor C 1, C2 forms, DC circuit one termination signal amplifier voltage input end, the TV signal of the output output of amplifier signal is through alternating current circuit, through coaxial cable output, the voltage signal of coaxial cable input is input to the amplifier voltage input end through DC circuit again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200512042U CN201336690Y (en) | 2009-02-16 | 2009-02-16 | Power supply circuit capable of being identified automatically through television antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200512042U CN201336690Y (en) | 2009-02-16 | 2009-02-16 | Power supply circuit capable of being identified automatically through television antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201336690Y true CN201336690Y (en) | 2009-10-28 |
Family
ID=41288355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200512042U Expired - Fee Related CN201336690Y (en) | 2009-02-16 | 2009-02-16 | Power supply circuit capable of being identified automatically through television antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201336690Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013163899A1 (en) * | 2012-05-02 | 2013-11-07 | 深圳市同洲电子股份有限公司 | Method and system for supplying power in feeding manner, and digital tv receiving terminal |
| WO2016127537A1 (en) * | 2015-02-09 | 2016-08-18 | 杭州海康威视数字技术股份有限公司 | Back-end processing circuit, front-end processing circuit, and coaxial power supply circuit |
-
2009
- 2009-02-16 CN CNU2009200512042U patent/CN201336690Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013163899A1 (en) * | 2012-05-02 | 2013-11-07 | 深圳市同洲电子股份有限公司 | Method and system for supplying power in feeding manner, and digital tv receiving terminal |
| WO2016127537A1 (en) * | 2015-02-09 | 2016-08-18 | 杭州海康威视数字技术股份有限公司 | Back-end processing circuit, front-end processing circuit, and coaxial power supply circuit |
| EP3220632A4 (en) * | 2015-02-09 | 2018-06-13 | Hangzhou Hikvision Digital Technology Co., Ltd. | Back-end processing circuit, front-end processing circuit, and coaxial power supply circuit |
| US10142586B2 (en) | 2015-02-09 | 2018-11-27 | Hangzhou Hikvision Digital Technology Co., Ltd. | Front-end and back-end processing circuits and POC circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Foshan Zhongyuan Creative Industrial Co., Ltd. Assignor: Zhang Weiqiang Contract fulfillment period: 2009.11.20 to 2016.11.20 Contract record no.: 2009440001896 Denomination of utility model: Power supply circuit capable of being identified automatically through television antenna Granted publication date: 20091028 License type: Exclusive license Record date: 20091216 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.11.20 TO 2016.11.20; CHANGE OF CONTRACT Name of requester: FOSHAN ZHONGYUAN CREATIVE INDUSTRIAL CO. LTD. Effective date: 20091216 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20180216 |