CN202309995U - Digital television controller - Google Patents
Digital television controller Download PDFInfo
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- CN202309995U CN202309995U CN2011203218185U CN201120321818U CN202309995U CN 202309995 U CN202309995 U CN 202309995U CN 2011203218185 U CN2011203218185 U CN 2011203218185U CN 201120321818 U CN201120321818 U CN 201120321818U CN 202309995 U CN202309995 U CN 202309995U
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- nand gate
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- modulation circuit
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Abstract
The utility model relates to a controller, in particular to a digital television controller. The digital television controller comprises a receiver, a carrier oscillator, a modulation circuit and an emitter, wherein the receiver, the carrier oscillator and the emitter are respectively connected with the modulation circuit; an infrared signal received by the receiver is transmitted to the modulation circuit; the carrier oscillator produces a carrier signal with the same frequency as the received signal and transmits the carrier signal to the modulation circuit; the modulation circuit processes the received signal and the carrier signal, so as to obtain an emitter driving signal; and the emitter emits an infrared signal after receiving the driving signal. The digital television controller disclosed by the utility model is simple to operate; and as two televisions are controlled by one set-top box, the costs are saved.
Description
Technical field
The utility model relates to a kind of remote controller, especially a kind of DTV controller.
Background technology
Along with the popularization of DTV in each city, the number of users of DTV STB is more and more.But the such problem of ubiquity in the middle of STB uses: when the TV in two rooms or a plurality of rooms needs digital television signal source to watch program, need STB of each self-configuring.So, not only the cost of STB has improved, and also need increase extra license fee usefulness every month, very uneconomical.
Summary of the invention
The utility model technical problem to be solved is to the deficiency of above-mentioned background technology, and a kind of DTV controller is provided.
The utility model adopts following technical scheme for realizing the foregoing invention purpose:
A kind of DTV controller comprises receiver, carrier oscillator, modulation circuit, reflector; Wherein receiver, carrier oscillator, reflector are connected with modulation circuit respectively; Wherein:
Said receiver is sent to modulation circuit with the infrared signal of remote controller emission, and carrier oscillator generation simultaneously is sent to modulation circuit with the carrier signal of the infrared signal same frequency that receiver receives;
Infrared signal, carrier oscillator generation carrier signal that modulation circuit is handled the receiver reception obtain the driven signal;
Transmitter receipt is launched infrared signal after drive signal.
In the said DTV watch-dog, receiver comprises: infrared receiving terminal, second electric capacity, the 3rd electric capacity, the 3rd resistance; Said carrier oscillator comprises: second NAND gate, the 3rd NAND gate, first resistance, second resistance, first electric capacity; Said modulation circuit comprises inverter, first NAND gate; Said reflector comprises: the 4th resistance, the 5th resistance, triode, infrarede emitting diode; Wherein:
The input of said infrared receiving terminal is connected with the positive pole of the 3rd electric capacity, an end of the 3rd resistance respectively, and the other end of the 3rd resistance is connected with the positive pole of second electric capacity; The negative pole of the negative pole of the earth terminal of infrared receiving terminal, second electric capacity, the 3rd electric capacity is ground connection respectively, and the output of infrared receiving terminal is connected with the input of inverter;
The output of said inverter is connected with the first input end of first NAND gate; The power end of first NAND gate is connected with dc power anode, the earth terminal ground connection of first NAND gate;
One end of said second resistance is connected with the input of second NAND gate; The output of second NAND gate is connected with the input of the 3rd NAND gate, an end of first resistance respectively; The output of the 3rd NAND gate is connected with the positive pole of first electric capacity, second input of first NAND gate respectively, and the other end of second resistance connects the other end of first resistance, the negative pole of first electric capacity respectively;
The output of said first NAND gate connects the input of the 4th resistance; The output of the 4th resistance connects the base stage of triode; The emitter of triode is connected with dc power anode; One end of the collector electrode of triode and the 5th resistance is connected, and the other end of the 5th resistance connects the positive pole of infrarede emitting diode, and the negative electrode of infrarede emitting diode is connected with dc power cathode.
In the said DTV watch-dog, infrared receiving terminal has been selected the TL0038A chip for use.
The utility model adopts technique scheme, has following beneficial effect: simple to operate, two TVs of a STB control have been practiced thrift cost.
Description of drawings
Fig. 1 is the installation connection layout of DTV controller.
Fig. 2 is the circuit diagram of DTV controller.
Embodiment
Be elaborated below in conjunction with the technical scheme of accompanying drawing to the utility model:
The installation connection layout of DTV controller as shown in Figure 1, a kind of simple and easy DTV controller connects two rooms, divides the television set that is located at two rooms, links to each other through audio frequency, video connecting line.Connecting line is through walls when wiring, notices that wiring is attractive in appearance.Note infrared transmitting tube during installation on the infrared receiving window mouth limit of STB and, and the infrared signal receive window to be put on the position of another TV, makes things convenient for remote control to receive facing to receiver window.Open STB during use, two TVs all have the TV signals of this STB output, can this STB of remote control in each room, and certain two TVs can only be received same.
The circuit diagram of DTV controller is as shown in Figure 2, comprising: receiver, carrier oscillator, modulation circuit, reflector; Wherein receiver, carrier oscillator, reflector are connected with modulation circuit respectively;
The infrared signal of said receiver remote controller emission is sent to modulation circuit; Carrier oscillator produces with the carrier signal that receives the signal same frequency and is sent to modulation circuit; Modulation circuit is handled the reception signal and carrier signal obtains the driven signal, and transmitter receipt is launched infrared signal after drive signal.
The integrated infrared receiving terminal of TL0038A is at television set or the normal a kind of reception head that adopts of VCD back warp.Infrarede emitting diode D1 is an infrared transmitting tube, can tear open from old remote controller, and the 4.5V power supply adopts battery of mobile phone.
TL0038A is responsible for the reception and the demodulation of infrared signal.The infrared pulse signal demodulation that it will be modulated at when receiving infrared signal on the 38kHz carrier wave is come out.If this signal is delivered to STB through infrared emission can't be discerned.Therefore inverter ic 1C plays inverting function, and when not pressing remote controller, inverter ic 1C must export low, and D1 is emission not.If conversely, D1 has emission always at ordinary times, and battery consumes soon and is over.
The signal of remote controller is with 38kHz modulation, the second NAND gate IC1A among Fig. 1, and the 3rd NAND gate IC1B constitutes multivibrator, regulates first capacitor C 1, second resistance R 2 makes frequency reach 38kHz.Produce the carrier signal of 38kHz and the modulation signal after the inverter ic 1C anti-phase and modulate through the first NAND gate IC1D, output to the base stage of triode, the collector electrode output of triode drives infrared transmitting tube, sends the signal the same with remote controller.
During debugging, press facing to the infrared remote receiver window, should tangible change in voltage should be arranged, just accomplish debugging from the infrared transmitting tube two ends with IR remote controller, as long as voltage normally generally can operate as normal.
Claims (3)
1. a DTV controller is characterized in that, comprises receiver, carrier oscillator, modulation circuit, reflector; Wherein receiver, carrier oscillator, reflector are connected with modulation circuit respectively; Wherein:
Said receiver is sent to modulation circuit with the infrared signal of remote controller emission, and carrier oscillator generation simultaneously is sent to modulation circuit with the carrier signal of the infrared signal same frequency that receiver receives;
Infrared signal, carrier oscillator generation carrier signal that modulation circuit is handled the receiver reception obtain the driven signal;
Transmitter receipt is launched infrared signal after drive signal.
2. DTV controller according to claim 1 is characterized in that, said receiver comprises: infrared receiving terminal, second electric capacity, the 3rd electric capacity, the 3rd resistance; Said carrier oscillator comprises: second NAND gate, the 3rd NAND gate, first resistance, second resistance, first electric capacity; Said modulation circuit comprises inverter, first NAND gate; Said reflector comprises: the 4th resistance, the 5th resistance, triode, infrarede emitting diode; Wherein:
The input of said infrared receiving terminal is connected with the positive pole of the 3rd electric capacity, an end of the 3rd resistance respectively, and the other end of the 3rd resistance is connected with the positive pole of second electric capacity; The negative pole of the negative pole of the earth terminal of infrared receiving terminal, second electric capacity, the 3rd electric capacity is ground connection respectively, and the output of infrared receiving terminal is connected with the input of inverter;
The output of said inverter is connected with the first input end of first NAND gate; The power end of first NAND gate is connected with dc power anode, the earth terminal ground connection of first NAND gate;
One end of said second resistance is connected with the input of second NAND gate; The output of second NAND gate is connected with the input of the 3rd NAND gate, an end of first resistance respectively; The output of the 3rd NAND gate is connected with the positive pole of first electric capacity, second input of first NAND gate respectively, and the other end of second resistance connects the other end of first resistance, the negative pole of first electric capacity respectively;
The output of said first NAND gate connects the input of the 4th resistance; The output of the 4th resistance connects the base stage of triode; The emitter of triode is connected with dc power anode; One end of the collector electrode of triode and the 5th resistance is connected, and the other end of the 5th resistance connects the positive pole of infrarede emitting diode, and the negative electrode of infrarede emitting diode is connected with dc power cathode.
3. DTV controller according to claim 1 is characterized in that said infrared receiving terminal has been selected the TL0038A chip for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203218185U CN202309995U (en) | 2011-08-31 | 2011-08-31 | Digital television controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203218185U CN202309995U (en) | 2011-08-31 | 2011-08-31 | Digital television controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202309995U true CN202309995U (en) | 2012-07-04 |
Family
ID=46378802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203218185U Expired - Fee Related CN202309995U (en) | 2011-08-31 | 2011-08-31 | Digital television controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202309995U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699005A (en) * | 2013-12-26 | 2014-04-02 | 河南东骏智能科技有限公司 | Infrared gesture switch controller |
| CN107749160A (en) * | 2017-11-27 | 2018-03-02 | 深圳市康冠技术有限公司 | A kind of infrared signal repeat circuit |
-
2011
- 2011-08-31 CN CN2011203218185U patent/CN202309995U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699005A (en) * | 2013-12-26 | 2014-04-02 | 河南东骏智能科技有限公司 | Infrared gesture switch controller |
| CN107749160A (en) * | 2017-11-27 | 2018-03-02 | 深圳市康冠技术有限公司 | A kind of infrared signal repeat circuit |
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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: 20120704 Termination date: 20120831 |