CN208351704U - A kind of remote-control receiving circuit - Google Patents
A kind of remote-control receiving circuit Download PDFInfo
- Publication number
- CN208351704U CN208351704U CN201820806501.2U CN201820806501U CN208351704U CN 208351704 U CN208351704 U CN 208351704U CN 201820806501 U CN201820806501 U CN 201820806501U CN 208351704 U CN208351704 U CN 208351704U
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- resistance
- capacitor
- module
- remote control
- remote
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Abstract
The utility model discloses a kind of remote-control receiving circuits, one end of resistance R201 is connected with the anode of 2 pins of remote control reception head and capacitor E201 respectively, the other end of resistance R201 is connected with one end of capacitor C201 and+5V power supply respectively, and the cathode of capacitor E201 and the other end of capacitor C201 are grounded；One end of resistance R203 is connected with+5V power supply, and the other end of resistance R203 is connected with one end of 3 pins of remote control reception head and resistance R202 respectively, and the other end of resistance R202 and one end of capacitor C102 are connected with master chip, the other end ground connection of capacitor C102.The utility model circuit structure is simple, the operation is stable and reliable, and signal transmitting is accurate.
Description
Technical field
The utility model relates to electronic technology fields, are related specifically to a kind of remote-control receiving circuit.
Background technique
Remote control technology is a kind of using extremely wide far distance control technology, is also widely being answered in many families
With.But remote control but when be subjected to extraneous interference, cause signal transmitting not accurate enough, the work of entire circuit be not sufficiently stable and
Reliably.
Utility model content
The purpose of this utility model is that aiming at the shortcomings in the prior art, a kind of remote-control receiving circuit is provided, to solve
The above problem.
The technical issues of the utility model is solved can be realized using following technical scheme:
A kind of remote-control receiving circuit, including remote control reception head, resistance R201, capacitor E201, capacitor C201, resistance R203,
Resistance R02 and capacitor C102, one end of resistance R201 positive phase with 2 pins of remote control reception head and capacitor E201 respectively
Even, the other end of resistance R201 is connected with one end of capacitor C201 and+5V power supply respectively, the cathode and capacitor of capacitor E201
The other end of C201 is grounded；One end of resistance R203 is connected with+5V power supply, the other end of resistance R203 respectively with remote control reception
3 pins of head and one end of resistance R202 are connected, and one end of the other end of resistance R202 and capacitor C102 are and master chip
It is connected, the other end ground connection of capacitor C102.
It further, further include resistance R101, resistance R202 is connected by R101 with master chip.
Further, the model REC201 of the remote control reception head, remote control reception head include photodiode, Input
Module, AGC module, BandPass module, Demodulator module, Contolol Circuit module and triode, photosensitive two
Pole pipe is used to receive the infrared ray of corresponding frequencies and generates electric current, and the electric current that AGC module is used to generate photodiode converts
For voltage, the voltage gain that BandPass module is used to export AGC module amplifies, and is demodulated by Demodulator module
Corresponding pulse voltage out, triode are used to the pulse voltage that Demodulator module exports carrying out level conversion and export
Pulse signal is sent into master chip processing.
Compared with prior art, the beneficial effects of the utility model are as follows:
The utility model circuit structure is simple, the operation is stable and reliable, and signal transmitting is accurate, passes through remote control reception head REC
It realizes photoelectric conversion and send master chip to handle output pulse signal, the electricity of input remote control reception head can be limited by resistance R201
Stream effectively prevent remote control reception head to damage.Capacitor E201 can stablize remote control reception head input voltage；Output can be improved in resistance R203
Stability also promotes this circuit to the versatility of all kinds of reception heads.Capacitor C201 can filter out power supply High-frequency Interference, can prevent capacitor
In the case that C201 internal electrical losses stream is bigger than normal, the pressure drop of resistance R201 is bigger than normal, leads to remote control reception failure.Resistance R202, resistance
The filter circuit of R101 and capacitor C102 composition can be filtered input chip signal；Resistance R202 and resistance R101 the two
Resistance also plays antistatic property to master chip and remote control reception head output pin other than current limliting.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of remote-control receiving circuit described in the utility model.
Fig. 2 is the internal structure circuit diagram of remote control reception head described in the utility model.
Specific embodiment
To be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, below
In conjunction with specific embodiment, the utility model is further described.
Referring to Fig. 1 and Fig. 2, a kind of remote-control receiving circuit described in the utility model, including remote control reception head, resistance
R201, capacitor E201, capacitor C201, resistance R203, resistance R02 and capacitor C102.One end of resistance R201 connects with remote control respectively
Receive head 2 pins and capacitor E201 anode be connected, the other end of resistance R201 respectively with one end of capacitor C201 and+5V
Power supply is connected.The cathode of capacitor E201 and the other end of capacitor C201 are grounded.One end of resistance R203 and+5V power supply phase
Even, the other end of resistance R203 is connected with one end of 3 pins of remote control reception head and resistance R202 respectively.Remote control reception head
1 pin ground connection.The other end of resistance R202 and one end of capacitor C102 are connected with master chip, another termination of capacitor C102
Ground.
It further include resistance R101, resistance R202 is connected by R101 with master chip.Resistance R101 be it is optional, work as remote control reception
Signal will be jumped to by display board by line group when handling on master control borad, and it is recommended to increase and be placed on resistance R101 with capacitor C102
On master control borad and it is positioned as close to master chip, resistance R202 is put on display board, when remote signal is directly by main on display board
When chip processing, resistance R101 be can be omitted.
The remote control reception head of other models in the market can also be used in the model REC201 of remote control reception head.Remote control reception
Head includes photodiode, Input module, AGC module, BandPass module, Demodulator module, Contolol
Circuit module and triode.Photodiode is used to receive the infrared ray of corresponding frequencies and generates electric current, and AGC module is used for
Voltage is converted by the electric current that photodiode generates.The voltage gain that BandPass module is used to export AGC module amplifies,
And corresponding pulse voltage is demodulated by Demodulator module.Triode is used for the arteries and veins for exporting Demodulator module
It rushes voltage and carries out level conversion and output pulse signal feeding master chip processing.
The utility model circuit structure is simple, and remote control reception head REC realizes photoelectric conversion, and the infrared light for determining wavelength is believed
Number be converted to detectable electric signal.Contain light-sensitive element inside remote control reception head REC, by receiving a certain frequency model of window reception
The infrared light enclosed.When light-sensitive element receives the infrared ray of corresponding frequencies, generation electric current, is voltage through I-V circuit conversion, and pass through
After bandpass filtering gain amplification, corresponding pulse voltage is demodulated by demodulator, then through internal triode level conversion, export arteries and veins
Rushing signal send master chip to handle.
Resistance R201 is current-limiting resistance, the electric current of input remote control reception head can be limited, if without current-limiting resistance R201 when design
It is easy to cause and receives head damage.
Capacitor E201 is electrolytic capacitor, for stablizing remote control reception head input voltage.
Pull-up resistor R203 mainly improves output stability, also promotes this circuit to the versatility of all kinds of reception heads.
Capacitor C201 is ceramic disc capacitor, for filtering out power supply High-frequency Interference, placement location must be in the front end resistance R201,
It cannot be put between resistance R201 and remote control reception head REC, in the case where mainly preventing capacitor C201 internal electrical losses stream bigger than normal,
The pressure drop of resistance R201 is bigger than normal, leads to remote control reception failure, and can effectively solve that T-type on-hook on existing market went out such asks
Topic.
Resistance R202, resistance R101 and capacitor C102 form filter circuit, are filtered to input chip signal, resistance
R202 and resistance R101 the two resistance also play antistatic work to master chip and remote control reception head output pin other than current limliting
With.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (3)
1. a kind of remote-control receiving circuit, it is characterised in that: including remote control reception head, resistance R201, capacitor E201, capacitor C201,
Resistance R203, resistance R02 and capacitor C102, one end of resistance R201 respectively with 2 pins of remote control reception head and capacitor E201
Anode be connected, the other end of resistance R201 is connected with one end of capacitor C201 and+5V power supply respectively, the cathode of capacitor E201
And the other end of capacitor C201 is grounded；One end of resistance R203 is connected with+5V power supply, the other end of resistance R203 respectively with
3 pins of remote control reception head and one end of resistance R202 are connected, and the other end of resistance R202 and one end of capacitor C102 are equal
It is connected with master chip, the other end ground connection of capacitor C102.
2. remote-control receiving circuit according to claim 1, it is characterised in that: further include resistance R101, resistance R202 passes through
R101 is connected with master chip.
3. remote-control receiving circuit according to claim 1, it is characterised in that: the model of the remote control reception head
REC201, remote control reception head include photodiode, Input module, AGC module, BandPass module, Demodulator mould
Block, Contolol Circuit module and triode, photodiode are used to receive the infrared ray of corresponding frequencies and generate electric current,
AGC module is used to convert the electric current that photodiode generates to voltage, and BandPass module is used for the electricity for exporting AGC module
Gain amplification is pressed, and corresponding pulse voltage is demodulated by Demodulator module, triode is used for Demodulator
The pulse voltage of module output carries out level conversion and output pulse signal is sent into master chip processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820806501.2U CN208351704U (en) | 2018-05-28 | 2018-05-28 | A kind of remote-control receiving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820806501.2U CN208351704U (en) | 2018-05-28 | 2018-05-28 | A kind of remote-control receiving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208351704U true CN208351704U (en) | 2019-01-08 |
Family
ID=64891305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820806501.2U Expired - Fee Related CN208351704U (en) | 2018-05-28 | 2018-05-28 | A kind of remote-control receiving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208351704U (en) |
-
2018
- 2018-05-28 CN CN201820806501.2U patent/CN208351704U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190108 Termination date: 20200528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |