CN218734879U - Infrared wireless earphone control circuit and device based on frequency modulation transmission - Google Patents
Infrared wireless earphone control circuit and device based on frequency modulation transmission Download PDFInfo
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- CN218734879U CN218734879U CN202223015868.8U CN202223015868U CN218734879U CN 218734879 U CN218734879 U CN 218734879U CN 202223015868 U CN202223015868 U CN 202223015868U CN 218734879 U CN218734879 U CN 218734879U
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Abstract
The utility model discloses an infrared wireless earphone control circuit and device based on frequency modulation transmission, include: the device comprises an audio detection module, a coding modulation module, an infrared emission module, an infrared receiving module, a decoding modulation module and an audio amplification module; the audio detection module is electrically connected with the code modulation module, and the code modulation module is electrically connected with the infrared emission module; the infrared transmitting module is wirelessly connected with the infrared receiving module; the infrared receiving module is electrically connected with the decoding modulation module, and the decoding modulation module is electrically connected with the audio amplification module; the audio detection module performs signal detection on the audio input signal; the coding modulation module carries out carrier signal modulation on the audio input signal; the infrared transmitting module is used for transmitting the carrier signal; the infrared receiving module is used for receiving the carrier signal; the decoding modulation module is used for demodulating and decoding the carrier signal; the audio amplification module is used for amplifying and outputting the demodulated and decoded signal. The utility model discloses can realize infrared wireless earphone's communication control, have the advantage that stability is good and interference immunity is strong.
Description
Technical Field
The utility model relates to an earphone technical field especially relates to an infrared wireless earphone control circuit and device based on frequency modulation transmission.
Background
The wireless headset realizes the short-distance transmission of audio signals by means of infrared rays, and is called as an infrared wireless headset. The infrared wireless earphone uses infrared as communication carrier, transmits signal by the transmission of infrared in the air, and is completed by an infrared transmitter and an infrared receiver. At the transmitting end, the transmitted signal is sent into an electro-optical conversion circuit after being subjected to amplitude modulation, and is converted into an infrared light signal by an infrared transmitting tube to be transmitted into the air; at a receiving end, the infrared receiver performs photoelectric conversion on the received infrared light signal, and restores the original signal after amplitude demodulation. In the prior art, the infrared wireless earphone has the defects of poor stability, low performance, high possibility of interference and the like, and the use experience of a user is reduced. Therefore, the invention provides a reliable and stable infrared wireless earphone control circuit based on frequency modulation transmission, which is a problem to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
The infrared wireless earphone control circuit based on frequency modulation transmission comprises an audio detection module, a frequency modulation transmission module and a frequency modulation transmission module, wherein the audio detection module is used for carrying out signal detection on an audio input signal; the coding modulation module is used for carrying out carrier signal modulation on the audio input signal; the infrared transmitting module is used for transmitting the carrier signal; the infrared receiving module is used for receiving the carrier signal; the decoding modulation module is used for demodulating and decoding the carrier signal; the audio amplification module is used for amplifying and outputting the demodulated and decoded signals, so that the communication control of the infrared wireless earphone can be realized, and the advantages of good stability and strong anti-interference performance are achieved.
In order to solve the technical problem, the application provides an infrared wireless earphone control circuit based on frequency modulation transmission, which comprises an audio detection module, a coding modulation module, an infrared transmission module, an infrared receiving module, a decoding modulation module and an audio amplification module;
the audio detection module is electrically connected with the code modulation module, and the code modulation module is electrically connected with the infrared emission module; the infrared transmitting module is in infrared wireless connection with the infrared receiving module; the infrared receiving module is electrically connected with the decoding modulation module, and the decoding modulation module is electrically connected with the audio amplification module;
the audio detection module is used for carrying out signal detection on an audio input signal; the code modulation module is used for carrying out carrier signal modulation on the audio input signal; the infrared transmitting module is used for transmitting the carrier signal; the infrared receiving module is used for receiving the carrier signal; the decoding modulation module is used for demodulating and decoding the carrier signal; the audio amplification module is used for amplifying and outputting the demodulated and decoded signal.
Preferably, the code modulation module includes a first control unit and an analog-to-digital conversion unit;
the first control unit is electrically connected with the analog-to-digital conversion unit, and the analog-to-digital conversion unit is electrically connected with the infrared emission module.
Preferably, the infrared emission module comprises a voltage division unit, an infrared emission unit and a first amplification unit;
the analog-to-digital conversion unit is electrically connected with the voltage division unit, the voltage division unit is electrically connected with the infrared emission unit and the first amplification unit respectively, and the infrared emission unit is electrically connected with the first amplification unit and the input power supply respectively.
Preferably, the infrared receiving module comprises an infrared receiving unit and a second amplifying unit;
the infrared receiving unit is respectively electrically connected with an input power supply and the second amplifying unit, and the second amplifying unit is electrically connected with the decoding and modulating module.
Preferably, the decoding modulation module includes a second control unit and a digital-to-analog conversion unit;
the second control unit is electrically connected with the second amplifying unit, and the digital-to-analog conversion unit is electrically connected with the second control unit and the audio amplifying module respectively.
Preferably, the audio detection module comprises a first capacitor;
the first end of the first capacitor is electrically connected with the audio signal input end, and the second end of the first capacitor is electrically connected with the analog-to-digital conversion unit.
Preferably, the infrared emission unit includes a first infrared light emitting diode and a second infrared light emitting diode; the first amplifying unit comprises a first triode;
the first end of the first infrared light emitting diode is electrically connected with the input power supply and the voltage dividing unit respectively, the second end of the first infrared light emitting diode is electrically connected with the first end of the second infrared light emitting diode, the second end of the second infrared light emitting diode is electrically connected with the collector electrode of the first triode, the base electrode of the first triode is electrically connected with the voltage dividing unit, and the emitter electrode of the first triode is grounded.
Preferably, the infrared receiving unit comprises a photodiode, a first resistor and a second capacitor;
the first end of the photosensitive diode is electrically connected with the input power supply and the second amplification unit respectively, the second end of the photosensitive diode is electrically connected with the first end of the first resistor and the first end of the second capacitor respectively, the second end of the second capacitor is electrically connected with the second amplification unit, and the second end of the first resistor is grounded.
Preferably, the second amplifying unit includes an amplifier, an adjustable resistor, a second resistor, and a third capacitor;
the first end of the adjustable resistor is electrically connected with the infrared receiving unit, the second end of the adjustable resistor is electrically connected with the inverting input end of the amplifier, the third end of the adjustable resistor is electrically connected with the non-inverting input end and the ground end of the amplifier, the output end of the amplifier is electrically connected with the first end of the third capacitor and the decoding modulation module respectively, the second end of the third capacitor is electrically connected with the first end of the second resistor, and the second end of the second resistor is grounded.
In order to solve the technical problem, the application provides an infrared wireless earphone control device based on frequency modulation transmission, which comprises an infrared wireless earphone control circuit based on frequency modulation transmission.
The utility model discloses an infrared wireless earphone control circuit based on frequency modulation transmission has following beneficial effect, the utility model discloses an infrared wireless earphone control circuit based on frequency modulation transmission includes: the device comprises an audio detection module, a coding modulation module, an infrared emission module, an infrared receiving module, a decoding modulation module and an audio amplification module; the audio detection module is electrically connected with the code modulation module, and the code modulation module is electrically connected with the infrared emission module; the infrared transmitting module is wirelessly connected with the infrared receiving module; the infrared receiving module is electrically connected with the decoding modulation module, and the decoding modulation module is electrically connected with the audio amplification module; the audio detection module performs signal detection on the audio input signal; the coding modulation module carries out carrier signal modulation on the audio input signal; the infrared transmitting module is used for transmitting the carrier signal; the infrared receiving module is used for receiving the carrier signal; the decoding modulation module is used for demodulating and decoding the carrier signal; the audio amplification module is used for amplifying and outputting the demodulated and decoded signal. Therefore, the communication control of the infrared wireless earphone can be realized, and the advantages of good stability and strong anti-interference performance are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:
fig. 1 is a schematic block diagram of an infrared wireless earphone control circuit based on frequency modulation transmission according to a preferred embodiment of the present invention;
fig. 2 is a circuit diagram of a code modulation module according to a preferred embodiment of the present invention;
fig. 3 is a circuit diagram of an infrared emitting module according to a preferred embodiment of the present invention;
fig. 4 is a circuit diagram of an infrared receiving module according to a preferred embodiment of the present invention;
fig. 5 is a circuit diagram of a decoding modulation module according to a preferred embodiment of the present invention;
fig. 6 is a circuit diagram of an audio amplifier module according to a preferred embodiment of the present invention.
Detailed Description
The core of the application is to provide an infrared wireless earphone control circuit based on frequency modulation transmission, in the scheme, an audio detection module is used for carrying out signal detection on an audio input signal; the coding modulation module is used for carrying out carrier signal modulation on the audio input signal; the infrared transmitting module is used for transmitting the carrier signal; the infrared receiving module is used for receiving the carrier signal; the decoding modulation module is used for demodulating and decoding the carrier signal; the audio amplification module is used for amplifying and outputting the demodulated and decoded signals, so that the communication control of the infrared wireless earphone can be realized, and the advantages of good stability and strong anti-interference performance are achieved.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an infrared wireless headset control circuit based on frequency modulation transmission according to the present application, including an audio detection module 1, a coding modulation module 2, an infrared transmission module 3, an infrared receiving module 4, a decoding modulation module 5, and an audio amplification module 6;
the audio detection module 1 is electrically connected with the code modulation module 2, and the code modulation module 2 is electrically connected with the infrared emission module 3; the infrared transmitting module 3 is in infrared wireless connection with the infrared receiving module 4; the infrared receiving module 4 is electrically connected with the decoding modulation module 5, and the decoding modulation module 5 is electrically connected with the audio amplification module 6;
the audio detection module 1 is used for performing signal detection on an audio input signal; the code modulation module 2 is configured to perform carrier signal modulation on the audio input signal; the infrared emission module 3 is used for emitting the carrier signal; the infrared receiving module 4 is configured to receive the carrier signal; the decoding and modulating module 5 is configured to demodulate and decode the carrier signal; the audio amplification module 6 is configured to amplify and output the demodulated and decoded signal.
In the prior art, the infrared wireless earphone has the defects of poor stability, low performance, high possibility of interference and the like, and the use experience of a user is reduced.
Aiming at the defects, the communication control of the infrared wireless earphone is realized through the cooperation of the audio detection module 1, the coding modulation module 2, the infrared emission module 3, the infrared receiving module 4, the decoding modulation module 5 and the audio amplification module 6, and the advantages of good stability and strong anti-interference performance are achieved.
Specifically, the infrared data transmission method and the infrared data transmission system utilize infrared wireless as a communication medium, can realize a long-distance infrared data transmission mode, are free from radio interference, and are high in reliability and communication bandwidth.
In summary, the present application provides an infrared wireless headset control circuit based on frequency modulation transmission, in this scheme, the infrared wireless headset control circuit includes an audio detection module 1, a coding modulation module 2, an infrared transmission module 3, an infrared receiving module 4, a decoding modulation module 5, and an audio amplification module 6; the audio detection module 1 is electrically connected with the code modulation module 2, and the code modulation module 2 is electrically connected with the infrared emission module 3; the infrared transmitting module 3 is in infrared wireless connection with the infrared receiving module 4; the infrared receiving module 4 is electrically connected with the decoding modulation module 5, and the decoding modulation module 5 is electrically connected with the audio amplification module 6; the audio detection module 1 is used for performing signal detection on an audio input signal; the code modulation module 2 is configured to perform carrier signal modulation on the audio input signal; the infrared emission module 3 is used for emitting the carrier signal; the infrared receiving module 4 is configured to receive the carrier signal; the decoding and modulating module 5 is configured to demodulate and decode the carrier signal; the audio amplification module 6 is configured to amplify and output the demodulated and decoded signal.
On the basis of the above-described embodiment:
referring to fig. 2, fig. 2 is a circuit diagram of a code modulation module according to the present application.
As a preferred embodiment, the code modulation module 2 includes a first control unit 21 and an analog-to-digital conversion unit 22;
the first control unit 21 is electrically connected with the analog-to-digital conversion unit 22, and the analog-to-digital conversion unit 22 is electrically connected with the infrared emission module 3.
As a preferred embodiment, the audio detection module 1 comprises a first capacitor C11;
a first end of the first capacitor C11 is electrically connected to the audio signal input end, and a second end of the first capacitor C11 is electrically connected to the analog-to-digital conversion unit 22.
Specifically, in this embodiment, the first control unit 21 is implemented by a single chip microcomputer, the chip model is STC89C52, and the chip model of the analog-to-digital conversion unit 22 is AD9851.
Specifically, the input detection of the audio signal of the present application is realized by connecting a 10 μ F capacitor in series with a signal input port, and then transmitting the audio signal to a code modulation module 2 formed by a single chip microcomputer and an AD9851, wherein the function of the code modulation module 2 is to generate a sinusoidal signal of 45khz, vpp of which is not more than 500mV, to be used as a carrier signal, and modulate and output the audio signal to an infrared emission module 3.
Referring to fig. 3, fig. 3 is a circuit diagram of an infrared emitting module provided in the present application.
As a preferred embodiment, the infrared emission module 3 includes a voltage dividing unit 31, an infrared emission unit 32, and a first amplifying unit 33;
the analog-to-digital conversion unit 22 is electrically connected to the voltage dividing unit 31, the voltage dividing unit 31 is electrically connected to the infrared emission unit 32 and the first amplification unit 33, and the infrared emission unit 32 is electrically connected to the first amplification unit 33 and an input power source.
As a preferred embodiment, the infrared emission unit 32 includes a first infrared light emitting diode D2 and a second infrared light emitting diode D1; the first amplifying unit 33 includes a first transistor Q1;
the first end of the first infrared light emitting diode D2 is respectively electrically connected with the input power supply and the voltage dividing unit 31, the second end of the first infrared light emitting diode D2 is electrically connected with the first end of the second infrared light emitting diode D1, the second end of the second infrared light emitting diode D1 is electrically connected with the collector electrode of the first triode Q1, the base electrode of the first triode Q1 is electrically connected with the voltage dividing unit 31, and the emitting electrode of the first triode Q1 is grounded.
Specifically, according to the characteristics of the infrared light emitting diode, the modulated audio signal is converted into an infrared light signal by matching with the amplification characteristics of the 8050 triode, and the infrared light signal is emitted after being amplified. The infrared emission unit 32 adopts a common emitter basic amplifier, has a current amplification effect, has strong output load capacity, and plays roles of impedance transformation and isolation buffering, so that signals are not easy to distort during transmission. In order to increase the radiation area of the ir emitter, the present embodiment connects two ir leds D1 and D2 in series at the collector of the transistor Q1.
Referring to fig. 4, fig. 4 is a circuit diagram of an infrared receiving module provided in the present application.
As a preferred embodiment, the infrared receiving module 4 includes an infrared receiving unit 41 and a second amplifying unit 42;
the infrared receiving unit 41 is electrically connected to an input power supply and the second amplifying unit 42, and the second amplifying unit 42 is electrically connected to the decoding and modulating module 5.
As a preferred embodiment, the infrared receiving unit 41 includes a photodiode D1 LED1, a first resistor R1, and a second capacitor C1;
the first end of the photodiode D1 LED1 is electrically connected to the input power supply and the second amplifying unit 42, the second end of the photodiode D1 LED1 is electrically connected to the first end of the first resistor R1 and the first end of the second capacitor C1, the second end of the second capacitor C1 is electrically connected to the second amplifying unit 42, and the second end of the first resistor R1 is grounded.
As a preferred embodiment, the second amplifying unit 42 includes an amplifier U1, an adjustable resistor RT, a second resistor R2, and a third capacitor C5;
the first end of adjustable resistance RT with infrared receiving element 41 electricity is connected, the second end of adjustable resistance RT with the inverting input electricity of amplifier is connected, the third end of adjustable resistance RT with amplifier U1's in-phase input and ground connection end electricity are connected, amplifier U1's output with respectively with the first end of third electric capacity reaches decode modulation module 5 electricity and connect, third electric capacity C5's second end with the first end electricity of second resistance R2 is connected, second resistance R2's second end ground connection.
Specifically, in the present embodiment, the amplifier U1 is of the type LM386. In another preferred embodiment, the type of the amplifier U1 is not particularly limited.
Specifically, the infrared light signal is received by the characteristics of the photodiode, and the signal transmitted by the transmitting end is received by the amplification characteristics of the LM386, and then output to the decoding modulation module 5. It can be understood that the LM386 is an audio integrated power amplifier, which has the advantages of low self power consumption, adjustable voltage gain, large power voltage range, few external components, small total harmonic distortion, etc., and is widely used in the recorder and the radio.
Referring to fig. 5, fig. 5 is a circuit diagram of a decoding modulation module according to the present application.
As a preferred embodiment, the decoding and modulating module 5 includes a second control unit 51 and a digital-to-analog converting unit 52;
the second control unit 51 is electrically connected to the second amplifying unit 42, and the digital-to-analog conversion unit 52 is electrically connected to the second control unit 51 and the audio amplifying module 6, respectively.
Specifically, the decoding and modulating module 5 converts the received signal by using a single chip and a D/a converter to obtain a demodulated and decoded signal with a bandwidth of about 200 kHz. In this embodiment, the second control unit 51 is a single chip microcomputer, the chip type of the single chip microcomputer is STC89C52, and the chip type of the digital-to-analog conversion unit 52 is DAC0832. In another preferred embodiment, the chip type of the single chip and the digital-to-analog conversion unit 52 is not particularly limited.
Referring to fig. 6, fig. 6 is a circuit diagram of an audio amplifying module according to the present disclosure.
Specifically, the audio amplifier is formed by the TD2030 integrated power amplifier circuit, and is used for further improving the driving capability of the earphone. It can be understood that the power amplification is performed by using the TD2030 integrated power amplifier circuit, which has the advantages of large output power and small distortion, and the power amplifier includes various protection circuits, and has safe operation and high reliability, and mainly has protection functions of short circuit protection, thermal protection, accidental ground line open circuit, reverse power supply polarity connection, load bleed voltage recoil and the like.
The application also provides an infrared wireless earphone control device based on frequency modulation transmission, including an infrared wireless earphone control circuit based on frequency modulation transmission.
For the introduction of the infrared wireless earphone control circuit based on frequency modulation transmission provided by the present application, please refer to the above embodiments, which are not described herein again.
It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An infrared wireless earphone control circuit based on frequency modulation transmission is characterized by comprising an audio detection module, a coding modulation module, an infrared transmission module, an infrared receiving module, a decoding modulation module and an audio amplification module;
the audio detection module is electrically connected with the code modulation module, and the code modulation module is electrically connected with the infrared emission module; the infrared transmitting module is in infrared wireless connection with the infrared receiving module; the infrared receiving module is electrically connected with the decoding modulation module, and the decoding modulation module is electrically connected with the audio amplification module;
the audio detection module is used for carrying out signal detection on an audio input signal; the code modulation module is used for carrying out carrier signal modulation on the audio input signal; the infrared transmitting module is used for transmitting the carrier signal; the infrared receiving module is used for receiving the carrier signal; the decoding modulation module is used for demodulating and decoding the carrier signal; the audio amplification module is used for amplifying and outputting the demodulated and decoded signal.
2. The infrared wireless earphone control circuit based on frequency modulation transmission of claim 1, wherein the code modulation module comprises a first control unit and an analog-to-digital conversion unit;
the first control unit is electrically connected with the analog-to-digital conversion unit, and the analog-to-digital conversion unit is electrically connected with the infrared emission module.
3. The infrared wireless earphone control circuit based on frequency modulation transmission of claim 2, wherein the infrared transmission module comprises a voltage division unit, an infrared transmission unit and a first amplification unit;
the analog-to-digital conversion unit is electrically connected with the voltage division unit, the voltage division unit is electrically connected with the infrared emission unit and the first amplification unit respectively, and the infrared emission unit is electrically connected with the first amplification unit and the input power supply respectively.
4. The infrared wireless earphone control circuit based on frequency modulation transmission of claim 1, wherein the infrared receiving module comprises an infrared receiving unit and a second amplifying unit;
the infrared receiving unit is respectively electrically connected with an input power supply and the second amplifying unit, and the second amplifying unit is electrically connected with the decoding and modulating module.
5. The infrared wireless earphone control circuit based on frequency modulation transmission of claim 4, wherein the decoding modulation module comprises a second control unit and a digital-to-analog conversion unit;
the second control unit is electrically connected with the second amplifying unit, and the digital-to-analog conversion unit is respectively electrically connected with the second control unit and the audio amplifying module.
6. The infrared wireless headset control circuit based on frequency modulation transmission of claim 2, wherein the audio detection module comprises a first capacitor;
the first end of the first capacitor is electrically connected with the audio signal input end, and the second end of the first capacitor is electrically connected with the analog-to-digital conversion unit.
7. The infrared wireless earphone control circuit based on frequency modulation transmission of claim 3, wherein the infrared transmission unit comprises a first infrared light emitting diode and a second infrared light emitting diode; the first amplifying unit comprises a first triode;
the first end of the first infrared light emitting diode is electrically connected with the input power supply and the voltage dividing unit respectively, the second end of the first infrared light emitting diode is electrically connected with the first end of the second infrared light emitting diode, the second end of the second infrared light emitting diode is electrically connected with the collector electrode of the first triode, the base electrode of the first triode is electrically connected with the voltage dividing unit, and the emitter electrode of the first triode is grounded.
8. The infrared wireless earphone control circuit based on frequency modulation transmission of claim 4, wherein the infrared receiving unit comprises a photosensitive diode, a first resistor and a second capacitor;
the first end of the photosensitive diode is electrically connected with the input power supply and the second amplification unit respectively, the second end of the photosensitive diode is electrically connected with the first end of the first resistor and the first end of the second capacitor respectively, the second end of the second capacitor is electrically connected with the second amplification unit, and the second end of the first resistor is grounded.
9. The infrared wireless earphone control circuit based on frequency modulation transmission of claim 4, wherein the second amplifying unit comprises an amplifier, an adjustable resistor, a second resistor and a third capacitor;
the first end of the adjustable resistor is electrically connected with the infrared receiving unit, the second end of the adjustable resistor is electrically connected with the inverting input end of the amplifier, the third end of the adjustable resistor is electrically connected with the non-inverting input end and the ground end of the amplifier, the output end of the amplifier is electrically connected with the first end of the third capacitor and the decoding modulation module respectively, the second end of the third capacitor is electrically connected with the first end of the second resistor, and the second end of the second resistor is grounded.
10. An infrared wireless earphone control device based on frequency modulation transmission, characterized in that, it comprises an infrared wireless earphone control circuit based on frequency modulation transmission of any claim 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223015868.8U CN218734879U (en) | 2022-11-11 | 2022-11-11 | Infrared wireless earphone control circuit and device based on frequency modulation transmission |
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| CN202223015868.8U CN218734879U (en) | 2022-11-11 | 2022-11-11 | Infrared wireless earphone control circuit and device based on frequency modulation transmission |
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