CN101887636A - Infrared signal transmission circuit of remote controller - Google Patents
Infrared signal transmission circuit of remote controller Download PDFInfo
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- CN101887636A CN101887636A CN2009101073225A CN200910107322A CN101887636A CN 101887636 A CN101887636 A CN 101887636A CN 2009101073225 A CN2009101073225 A CN 2009101073225A CN 200910107322 A CN200910107322 A CN 200910107322A CN 101887636 A CN101887636 A CN 101887636A
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- remote controller
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- signal transmission
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Abstract
The invention relates to an infrared signal transmission circuit of a remote controller, which comprises an NPN type triode, wherein the collector of the NPY type triode is connected to the cathode of an infrared transmission diode; the base of the NPN type triode is connected to a carrier signal wire, while an emitter is grounded; and the anode of the infrared transmission diode is connected to a signal wire for data to be transmitted. As signal modulation and signal amplification are simultaneously realized by the NPN type triode and components are reduced, the infrared signal transmission circuit and a debugging process are simplified, and the cost is saved. In addition, the infrared signal transmission circuit generates carrier signals and signals with the data to be transmitted by the same integrated chip, so the carrier signals and the signals with the data to be transmitted are not constructed by separate elements, and the accuracy is improved.
Description
Technical field
The present invention relates to infrared remote controller, particularly a kind of infrared signal transmission circuit of remote controller.
Background technology
As shown in Figure 1, the data that traditional infra-red remote control modulation circuit sends needs earlier are loaded on the carrier wave that has certain frequency to produce a modulation signal through particular electrical circuit 11 (for example Sheffer stroke gate), then above-mentioned modulation signal is amplified through amplifier 12, send by infrared light emitting diode, thereby realized the infra-red remote control emission.Its carrier frequency is generally 38kHz in infrared communication, also has some systems to use 32KHz, 36KHz, carrier frequencies such as 40KHz, 56KHz.
As shown in Figure 2, be a typical single channel Infrared Remote-Control Sending circuit.A slice high-speed cmos type quadruple two input NOT-AND gate 74HC00 in this radiating circuit, have been used.Wherein NOT-AND gate 3,4 is formed carrier oscillator, and oscillation frequency F0 transfers about 38kHz; NOT-AND gate 1,2 is formed LF oscillator, and oscillation frequency F1 needn't accurately adjust.Oscillation frequency F1 modulates F0, so the waveform of exporting from NOT-AND gate 4 is interrupted carrier wave, this also is the waveform that transmits through infrarede emitting diode.The waveform of several Key Points as shown in Figure 2, B ' waveform is that the A point does not add modulation waveform and the waveform of B point output when directly connecing high level among the figure.When the point of the A among Fig. 2 waveform is high level, infrarede emitting diode emission carrier wave; When A point waveform was low level, infrarede emitting diode was not launched carrier wave.This frequency of stopping one is exactly LFO Frequency F1.
Hence one can see that, and in existing Infrared remote controller modulation circuit, the carrier modulation part is two independent parts with the signal amplifying part branch, and is made up of different elements, makes percentage of circuit utilization lower.
Summary of the invention
The technical problem to be solved in the present invention is, at the lower problem of percentage of circuit utilization in the above-mentioned infra-red remote control modulation circuit, provides a kind of infrared signal transmission circuit.
The technical scheme that the present invention solves the problems of the technologies described above is, a kind of infrared signal transmission circuit of remote controller is provided, comprise that collector is connected to the NPN type triode of infrared light emitting diode negative pole, the base stage of described NPN type triode is connected to carrier signal line, grounded emitter, and the positive pole of described infrared light emitting diode is connected to data signal line to be sent.
In infrared signal transmission circuit of remote controller of the present invention, be provided with current-limiting resistance between the base stage of described NPN type triode and the carrier signal line.
In infrared signal transmission circuit of remote controller of the present invention, be provided with the regulating device that is used to regulate the infrared light emitting diode emissive power between the positive pole of described infrared light emitting diode and the data signal line to be sent.
In infrared signal transmission circuit of remote controller of the present invention, described regulating device is a resistance, and the resistance of described resistance is more little, and the emission peak power of described infrared light emitting diode is big more.
In infrared signal transmission circuit of remote controller of the present invention, the dutycycle of described carrier signal is 20-40%.
In infrared signal transmission circuit of remote controller of the present invention, described data signal line to be sent and carrier signal line are connected respectively to the different pins of same integrated chip.
In infrared signal transmission circuit of remote controller of the present invention, described integrated chip is provided with a plurality of input ports, and this integrated chip carries out the signal of different input ports to export data signal line to be sent to behind the different coding.
In infrared signal transmission circuit of remote controller of the present invention, described carrier signal line is connected to an oscillatory circuit.
In infrared signal transmission circuit of remote controller of the present invention, the frequency of carrier signal is 38kHz in the described carrier signal.
Infrared signal transmission circuit of remote controller of the present invention has realized simultaneously that by a NPN type triode signal modulation and signal amplify, and have reduced components and parts, thereby have simplified circuit and debug process, and provided cost savings.In addition, the present invention produces carrier signal by same integrated chip and band sends data-signal, and no longer builds by resolution element, has improved precision.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the schematic diagram of existing infrared signal transmission circuit;
Fig. 2 is the circuit diagram of existing infrared signal transmission circuit;
Fig. 3 is the circuit structure diagram of infrared signal transmission circuit of remote controller embodiment of the present invention;
Fig. 4 is the synoptic diagram that band sends data-signal and A point signal among Fig. 3;
Fig. 5 is the circuit structure diagram of another embodiment of infrared signal transmission circuit of remote controller of the present invention.
Embodiment
The present invention uses a NPN type triode to realize that simultaneously signal modulation and signal amplify, thereby can reduce the components and parts of infrared signal transmission circuit of remote controller.
As shown in Figure 3, be the circuit diagram of infrared signal transmission circuit of remote controller embodiment of the present invention.In the present embodiment, this circuit is formed by connecting by integrated chip, NPN type triode Q1, infrared light emitting diode D1 and two resistance R 1, R2, wherein the collector of the NPN type triode Q1 negative pole, base stage that are connected to infrared light emitting diode D1 is connected to carrier signal output port, the grounded emitter of integrated chip via current-limiting resistance R1, and the positive pole of infrared light emitting diode D1 is connected to data-signal output port to be sent (URAT mouth) via resistance R 2.
Integrated chip (for example CPU) is according to produce the data to be sent be made up of periodic scale-of-two code character (control command etc. for example from the input of peripheral hardware (for example keyboard etc.), as shown in Figure 4), the CCU module in the while integrated chip produces the carrier signal of 38kHz.Behind the modulation amplifying circuit that these two signals that produced by integrated chip are formed through current-limiting resistance R1, resistance R 2, NPN type triode Q1, drive infrared light emitting diode D1 and produce infrared ray to spatial emission, thus the realization emission function.
As shown in Figure 4, be the synoptic diagram of the signal after data-signal to be sent and the modulation.When the A point in Fig. 3 was high level, infrared light emitting diode D1 sent the signal of 38kHz, and when the A point was low level, infrared light emitting diode D1 did not send the signal of 38kHz.
In infrared signal transmission circuit of remote controller of the present invention, be provided with current-limiting resistance between the base stage of described NPN type triode and the carrier signal line.
Certainly, in foregoing circuit, current-limiting resistance R1 only is used for current limliting, and when the current stabilization of the carrier signal of integrated chip output, this current-limiting resistance R1 can omit.
In addition in use, increase data transmission distance if desired, can also improve the emission peak power of infrared light emitting diode D1 by the resistance of regulating resistance R 2.The resistance of resistance R 2 is more little, and emission peak power is big more, and data transmission distance is far away more.At this moment, in order to reduce power consumption and to the interference of other infrared equipments, the dutycycle of carrier signal needs to reduce, and generally selects the dutycycle (for example 20-40%) about 30%.
As shown in Figure 5, in another embodiment of the present invention, on the integrated chip a plurality of input ports can be set, this integrated chip carries out the signal of different input ports to export data signal line to be sent to behind the different coding, the distinct device of receiving end one of them coded data of decoding respectively.In this way, can realize the multichannel Infrared Remote-Control Sending.
In other embodiments of the invention, the base stage of NPN type triode Q1 can be free of attachment to integrated chip, and is connected to an oscillatory circuit.
In foregoing circuit, carrier signal is 38kHz, also can adopt the carrier signal of other frequencies when specific implementation, for example 40kHz etc.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (9)
1. infrared signal transmission circuit of remote controller, comprise that collector is connected to the NPN type triode of infrared light emitting diode negative pole, it is characterized in that, the base stage of described NPN type triode is connected to carrier signal line, grounded emitter, and the positive pole of described infrared light emitting diode is connected to data signal line to be sent.
2. infrared signal transmission circuit of remote controller according to claim 1 is characterized in that, is provided with current-limiting resistance between the base stage of described NPN type triode and the carrier signal line.
3. infrared signal transmission circuit of remote controller according to claim 1 and 2 is characterized in that, is provided with the regulating device that is used to regulate the infrared light emitting diode emissive power between the positive pole of described infrared light emitting diode and the data signal line to be sent.
4. infrared signal transmission circuit of remote controller according to claim 3 is characterized in that, described regulating device is a resistance, and the resistance of described resistance is more little, and the emission peak power of described infrared light emitting diode is big more.
5. infrared signal transmission circuit of remote controller according to claim 3 is characterized in that, the dutycycle of described carrier signal is 20-40%.
6. infrared signal transmission circuit of remote controller according to claim 1 is characterized in that, described data signal line to be sent and carrier signal line are connected respectively to the different pins of same integrated chip.
7. infrared signal transmission circuit of remote controller according to claim 6 is characterized in that described integrated chip is provided with a plurality of input ports, and this integrated chip carries out the signal of different input ports to export data signal line to be sent to behind the different coding.
8. infrared signal transmission circuit of remote controller according to claim 1 is characterized in that, described carrier signal line is connected to an oscillatory circuit.
9. infrared signal transmission circuit of remote controller according to claim 1 is characterized in that, the frequency of carrier signal is 38kHz in the described carrier signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009101073225A CN101887636B (en) | 2009-05-13 | 2009-05-13 | Infrared signal transmission circuit of remote controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101073225A CN101887636B (en) | 2009-05-13 | 2009-05-13 | Infrared signal transmission circuit of remote controller |
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| CN101887636A true CN101887636A (en) | 2010-11-17 |
| CN101887636B CN101887636B (en) | 2011-12-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104361739A (en) * | 2014-10-22 | 2015-02-18 | 高亿实业有限公司 | Forwarding method of infrared remote control signal and remote control signal forwarder |
| CN106097701A (en) * | 2016-07-29 | 2016-11-09 | 无锡思泰迪半导体有限公司 | A kind of infrared chip test platform based on FPGA |
| CN106878785A (en) * | 2017-02-17 | 2017-06-20 | 昆山康佳电子有限公司 | A kind of TV with acoustic control program guide |
| CN108182796A (en) * | 2018-01-23 | 2018-06-19 | 浙江国视科技有限公司 | A kind of IR remote controller and remote control thereof |
| CN109830098A (en) * | 2019-03-11 | 2019-05-31 | 攀枝花学院 | Infrared encoder and infrared communication device based on FPGA |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442861C (en) * | 2004-01-17 | 2008-12-10 | 深圳创维－Rgb电子有限公司 | General one-key telecontrol regulation method and apparatus |
| CN1816105A (en) * | 2006-03-03 | 2006-08-09 | 王寅 | Machine top-set telecontrol signal and video-audio frequency signal multi-zone extending system and method |
| CN201066535Y (en) * | 2007-02-25 | 2008-05-28 | 刘鸣 | Handheld remote controller with self-coding password and its theft prevention host |
| CN101304235B (en) * | 2008-06-30 | 2010-06-02 | 深圳和而泰智能控制股份有限公司 | High-frequency carrier generator |
-
2009
- 2009-05-13 CN CN2009101073225A patent/CN101887636B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104361739A (en) * | 2014-10-22 | 2015-02-18 | 高亿实业有限公司 | Forwarding method of infrared remote control signal and remote control signal forwarder |
| CN106097701A (en) * | 2016-07-29 | 2016-11-09 | 无锡思泰迪半导体有限公司 | A kind of infrared chip test platform based on FPGA |
| CN106878785A (en) * | 2017-02-17 | 2017-06-20 | 昆山康佳电子有限公司 | A kind of TV with acoustic control program guide |
| CN108182796A (en) * | 2018-01-23 | 2018-06-19 | 浙江国视科技有限公司 | A kind of IR remote controller and remote control thereof |
| CN109830098A (en) * | 2019-03-11 | 2019-05-31 | 攀枝花学院 | Infrared encoder and infrared communication device based on FPGA |
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| Publication number | Publication date |
|---|---|
| CN101887636B (en) | 2011-12-28 |
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Effective date of registration: 20191121 Address after: 215000 No.16, Youxiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: SUZHOU INOVANCE TECHNOLOGY Co.,Ltd. Address before: Futian District Shenzhen City, Guangdong province 518000 CaiTian Road No. 10 min Ning Garden Office Building 1 floor Co-patentee before: SHENZHEN INOVANCE TECHNOLOGY Co.,Ltd. Patentee before: SHENZHEN INOVANCE INFORMATION TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20210517 Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. Address before: 215000 No.16, Youxiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU INOVANCE TECHNOLOGY Co.,Ltd. |
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Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |