CN104254042B - Wireless microphone - Google Patents

Wireless microphone Download PDF

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Publication number
CN104254042B
CN104254042B CN201410367796.4A CN201410367796A CN104254042B CN 104254042 B CN104254042 B CN 104254042B CN 201410367796 A CN201410367796 A CN 201410367796A CN 104254042 B CN104254042 B CN 104254042B
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electric capacity
pin
inductance
radio frequency
resistance
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CN104254042A (en
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余邦东
申玉梅
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Audio Limited by Share Ltd
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Ningbo Soundking Electronic Co Ltd
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Abstract

The invention discloses a wireless microphone, which comprises an audio transmitter and an audio receiver, wherein a first signal processing circuit of the audio transmitter consists of a CC8520 first radio frequency chip and a first peripheral circuit, a second signal processing circuit of the audio receiver consists of a CC8520 second radio frequency chip and a second peripheral circuit, the first signal processing circuit is used for receiving a digital audio signal outputted by the analog to digital converter, converting the digital audio signal into a radio frequency signal, and inputting the radio frequency signal into a power amplifier, the power amplifier is used for performing power amplification on the radio frequency signal, and transmitting the radio frequency signal via a wireless transmission antenna, a wireless receiving antenna is used for receiving the radio frequency signal, a low-noise amplifier is used for amplifying the radio frequency signal, and then inputting the radio frequency signal into the second signal processing circuit, the second signal processing circuit is used for converting the radio frequency signal into the digital audio signal, and the analog to digital converter is used for converting the digital audio signal into an analog signal, and then outputting the analog signal. The wireless microphone has the advantages that the cost is lower, and the size is smaller.

Description

A kind of wireless microphone
Technical field
The present invention relates to a kind of microphone, more particularly, to a kind of wireless microphone.
Background technology
Audio emitter includes sound head, audio-frequency amplifier, audio compression expander, the audio tune for picking up external sound Device processed and radio-frequency power amplifier, wireless transmission antenna and the first power management module, sound head are connected with audio-frequency amplifier, audio Amplifier is connected with audio compression expander circuit, audio compression expander circuit and power amplifier, power amplifier and nothing Line transmitting antenna is connected, the operating voltage that the first power management module is used for needed for providing audio receiver.Audio receiver bag Include wireless receiving antenna, low-noise amplifier, audio demodulator, audio compression expander, audio-frequency amplifier, second source management Module, wireless receiving antenna is connected with low-noise amplifier, low-noise amplifier and audio demodulator, audio demodulator and audio Compander connection, audio compression expander and audio-frequency amplifier, second source management module are used to provide audio emitter Required operating voltage.
The operation principle of wireless microphone is：Audio emitter middle pitch head picks up external sound signal and is converted to faint Electric signal, audio-frequency amplifier amplifies extraneous faint electric signal, and audio compression expander is pressed the audio signal amplified Contracting is processed, and audio demodulator is launched after the audio signal after compression is converted into radiofrequency signal by wireless transmission antenna；Audio Wireless receiving antenna in receiver receives the radiofrequency signal of wireless transmission antenna transmitting, and low-noise amplifier is by the radiofrequency signal Be input in audio demodulator after treatment, audio demodulator radiofrequency signal is processed the radiofrequency signal is converted to it is compressed Audio signal be input in compander, it is simulated audio signal that compander is converted to the audio signal after compression After export, be achieved in the function of being wirelessly transferred audio of wireless microphone.
But there is problems with above-mentioned wireless microphone：Low-noise amplifier, audio demodulator, audio compression extension Device, audio-frequency amplifier as audio receiver core circuit, audio-frequency amplifier, audio compression expander, audio demodulator and Radio-frequency power amplifier as audio emitter core circuit, and this two parts core computer using pure hardware discrete unit Part realizes that component is more, and circuit volume is larger, thus causes holistic cost higher, and audio receiver and audio emission The volume of device is larger.
The content of the invention
The technical problems to be solved by the invention are to provide that a kind of cost is relatively low, and small volume wireless microphone, should In wireless microphone, the first signal processing circuit of audio emitter is used outside first radio frequency chip and first of model C C8520 Circuit composition is enclosed, the secondary signal process circuit of audio receiver is using second radio frequency chip of model C C8520 and the second periphery Circuit is constituted, and audio emitter and audio receiver circuit volume are smaller, and cost is relatively low.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：A kind of wireless microphone, including audio emission Device and audio receiver, described audio emitter include the first power supply for providing described audio emitter operating voltage Management module, sound head, analog-digital converter, power amplifier and the wireless transmission antenna being sequentially connected, described audio receiver Including the second source management module for providing described audio receiver operating voltage, the wireless receiving being sequentially connected day Line, low-noise amplifier, secondary signal process circuit and digital analog converter, described analog-digital converter and described power amplification Device is connected by the first signal processing circuit, described the first signal processing circuit by model C C8520 the first radio frequency chip and First peripheral circuit is constituted, and described low-noise amplifier and described digital analog converter is connected by secondary signal process circuit Connect, described secondary signal process circuit is made up of second radio frequency chip and the second peripheral circuit of model CC8520, described The first signal processing circuit receive the digital audio and video signals of described analog-digital converter output and turn the digital audio and video signals It is input into described power amplifier after being changed to radiofrequency signal, the radiofrequency signal is carried out power amplification by described power amplifier Launched by wireless transmission antenna afterwards, described wireless receiving antenna receives radiofrequency signal, and described low-noise amplifier should Radiofrequency signal is input in described secondary signal process circuit after amplifying, and described secondary signal process circuit is by radiofrequency signal Digital audio and video signals are converted to, digital analog converter is exported after digital audio and video signals are converted into analog signal.
Described analog-digital converter includes the first audio decoder, the first inductance, first of model TLV320AIC3101 Electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, first resistor, second resistance, 3rd resistor, the 4th resistance and the 5th resistance, the 7th pin of described the first audio decoder, one end of the first described electric capacity, One end of the second described electric capacity, one end of described first resistor, one end of described second resistance and the 3rd described electricity One end connection of resistance, the 6th pin of described the first audio decoder, the other end of the first described electric capacity and the second described electricity The other end of appearance is grounded, the described other end of first resistor, the 8th pin of the first described audio decoder and described The 32nd pin connection of one radio frequency chip, the other end of described second resistance, the 9th pin of the first described audio decoder and institute The 33rd pin connection of the first radio frequency chip stated, the other end of described 3rd resistor accesses 3.3V voltages, the first described sound 12nd pin of frequency decoder is connected with one end of the 3rd described electric capacity, the other end and the described the 4th of described the 3rd electric capacity One end of resistance connects and its connection end is the inversion signal input of described analog-digital converter, the inverting input with sound head Connection, the other end of the 4th described resistance is connected with the 15th pin of the first described audio decoder, the first described audio 13rd pin of decoder is connected with one end of the 4th described electric capacity, the other end of described the 4th electric capacity and the 5th described electricity One end of resistance connects and its connection end is the positive signal input part of described analog-digital converter, and the positive with described sound head is defeated Enter end connection, the other end ground connection of described the 5th resistance, the 17th pin and the 21st pin of described the first audio decoder connect Ground, the 18th pin of described the first audio decoder, the 24th pin, the 25th pin, one end of the 6th described electric capacity and described the One end connection of seven electric capacity accesses 3.3V voltages, the other end of described the 6th electric capacity, the other end of the 7th described electric capacity and 26th pin of the first described audio decoder is grounded, the 31st pin of described the first audio decoder and the first described electricity One end connection of sense, the described other end of the first inductance is connected with the 8th pin of the first radio frequency chip, the first described audio solution 1.8V voltages are accessed in code the 32nd pin of device and one end of the 5th described electric capacity, and the other end of the 5th described electric capacity is grounded, Digital audio and video signals after 1st pin to the 5th pin output conversion of the first described audio decoder.
The first described peripheral circuit includes the first crystal oscillator, the 6th resistance, the 7th resistance, the 8th electric capacity, the 9th electric capacity, the Ten electric capacity, the 11st electric capacity, the 12nd electric capacity, the 13rd electric capacity, the 14th electric capacity, the 15th electric capacity, the 16th electric capacity, the tenth Seven electric capacity, the 18th electric capacity, the 19th electric capacity, the second inductance, the 3rd inductance, the 4th inductance, the 5th inductance, the 6th inductance, Seven inductance, the 8th inductance, the 9th inductance, the tenth inductance, the 11st inductance, the 12nd inductance, the 13rd inductance, first switch and First light emitting diode, the 7th pin of the first described radio frequency chip is grounded by described first switch, the first described radio frequency 10th pin of chip, the 12nd pin, the 18th pin, the 37th pin, one end of the 8th described electric capacity, one end of the 9th described electric capacity, One end connection of one end, one end of the 18th described electric capacity and the 13rd described inductance of the tenth described electric capacity, it is described The 8th electric capacity the other end, the other end of the 9th described electric capacity, the other end and the described the tenth of the tenth described electric capacity The other end of eight electric capacity is grounded, and the other end of the 13rd described inductance accesses 3.3V voltages, the first described radio frequency chip The 13rd pin be connected with one end of the second described inductance, the 14th pin and the 3rd described inductance of described the first radio frequency chip One end connection, the 15th pin of the first described radio frequency chip is connected with one end of the 4th described inductance, and described first penetrates 16th pin of frequency chip is connected with one end of the 5th described inductance, the 17th pin and described of described the first radio frequency chip One end connection of six inductance, the other end, the other end of the 3rd described inductance, the 4th described inductance of described the second inductance The other end, the other end of the 5th described inductance and the 6th described inductance the other end receive digital audio and video signals, it is described The first radio frequency chip the 19th pin and the 7th described inductance one end connection, the other end of described the 7th inductance with it is described The first light emitting diode negative electrode connection, the anode of described the first light emitting diode connects with one end of the 6th described resistance Connect, the other end of described the 6th resistance accesses 3.3V voltages, the 20th pin, the 23rd pin, the 26th of described the first radio frequency chip It is pin, the 27th pin, the 28th pin, the 31st pin, one end of the 11st described electric capacity, one end of the 14th described electric capacity, described One end connection of one end of the 16th electric capacity, one end of the 15th described electric capacity and the 8th described inductance, the described the 8th The other end of inductance accesses 3.3V voltages, the other end, the other end, the institute of the 14th described electric capacity of described the 11st electric capacity The other end of the 15th electric capacity stated and the other end of the 16th described electric capacity are grounded, and the of described the first radio frequency chip One end connection of 21 pin, one end of the 12nd described electric capacity and the first described crystal oscillator, the of described the first radio frequency chip One end connection of 22 pin, the other end of the first described crystal oscillator and the 13rd described electric capacity, described the 12nd electric capacity it is another The other end of one end and the 13rd described electric capacity is grounded, and the 30th pin of the first described radio frequency chip passes through described the 7th Resistance eutral grounding, the 33rd pin of the first described radio frequency chip passes through described the 9th inductance and the first described audio decoder 9th pin is connected, and the 32nd pin of the first described radio frequency chip passes through described the tenth inductance and the first described audio decoder The connection of the 8th pin, the 36th pin of the first described radio frequency chip is connected with one end of the 12nd described inductance, described first 38th pin of radio frequency chip is connected with one end of the 11st described inductance, and the 39th pin of the first described radio frequency chip passes through institute The 19th capacity earth stated, the 40th pin of the first described radio frequency chip passes through the 17th described capacity earth, described The other end of the 11st inductance, the other end of the 12nd described inductance, the 24th pin of the first described radio frequency chip and described The first radio frequency chip the 25th pin output radiofrequency signal.
Described power amplifier includes the first power amplifier chips, the tenth resistance, the 8th resistance, the 9th of model CC2590 Resistance, the 14th inductance, the 15th inductance, the 16th inductance, the 17th inductance, the 20th electric capacity, the 21st electric capacity, second 12 electric capacity, the 23rd electric capacity, the 24th electric capacity, the 25th electric capacity and the 26th electric capacity, the first described power amplifier The radiofrequency signal that 2nd pin of chip, the 4th pin, the 5th pin and the first described signal processing circuit of the 6th pin access are exported, it is described 8th pin of the first power amplifier chips, the 9th pin, the 12nd pin and the 14th pin ground connection are the 7th pin of described the first power amplifier chips, described One end connection of one end of the tenth resistance and the 8th described resistance, the other end ground connection of described the tenth resistance, described the The other end of eight resistance, one end of the 23rd described electric capacity, one end, the described the 20th of the 24th described electric capacity One end of five electric capacity, one end of the 26th described electric capacity, one end of the 17th described inductance, the first described power amplifier core 10th pin of piece, the 13rd pin and the 16th pin connection, the other end of the 17th described inductance access 3.3V voltages, described second The other end of 13 electric capacity, the other end of the 24th described electric capacity, the other end of the 25th described electric capacity and described The other end of the 26th electric capacity be grounded, the 15th pin of the first described power amplifier chips is connect by the 9th described resistance Ground, one end connection of the 11st pin and the 14th described inductance of described the first power amplifier chips, described the 14th inductance One end connection of the other end, one end of the 20th described electric capacity and the 15th described inductance, described the 15th inductance One end connection of the other end and the 22nd described electric capacity, the other end, the described the 20th of described the 22nd electric capacity One end of one electric capacity, one end of the 16th described inductance and described wireless transmission antenna connection, the 20th described electric capacity The other end, the other end of the 21st described electric capacity and the other end of the 16th described inductance be grounded.
The first described power management module includes the first power supply changeover device, the model TLV700 of model TLV61220 The first voltage stabilizing chip, the 12nd resistance, the 11st resistance, the 18th inductance, the 27th electric capacity, the 28th electric capacity, 29 electric capacity, the 30th electric capacity and the 31st electric capacity, the 1st pin and the described the 18th of described the first power supply changeover device One end connection of inductance, the other end, one end and described first of the 31st described electric capacity of described the 18th inductance The 6th pin connection of power supply changeover device and access positive source, the other end of the 31st described electric capacity are grounded, and described first The 2nd pin ground connection of power supply changeover device, the 3rd pin of the first described power supply changeover device accesses power cathode, the first described power supply One end connection of the 4th pin, one end of the 12nd described resistance and the 11st described resistance of converter, the described the 12nd One end connection and output of the other end of resistance, the 5th pin of the first described power supply changeover device and the 30th described electric capacity 3.3V voltages, the described other end of the 30th electric capacity and the other end of the 11st described resistance is grounded, and described first One end connection of the 1st pin of voltage stabilizing chip, the 3rd pin, one end of the 28th described electric capacity and the 29th described electric capacity And 3.3V voltages are accessed in its connection end, the 2nd pin ground connection of described the first voltage stabilizing chip, described the 28th electric capacity it is another End, the described other end of the 29th electric capacity and one end of the 27th described electric capacity are grounded, and the described the 27th The 5th pin connection of the other end of electric capacity and the first described voltage stabilizing chip and output 1.8V voltages.
Described digital analog converter include USB interface, second audio decoder of LV320AIC3101, the 19th inductance, 32nd electric capacity, the 33rd electric capacity, the 36th electric capacity, the 37th electric capacity, the 38th electric capacity, the 34th electricity Appearance, the 35th electric capacity, the 15th resistance, the 13rd resistance and the 14th resistance, the 7th of described the second audio decoder the Pin, one end of the 32nd described electric capacity, one end of the 33rd described electric capacity, one end of the 15th described resistance, One end connection of one end of the 13rd described resistance and the 14th described resistance, the 6th of described the second audio decoder the The other end of pin, the other end of the 32nd described electric capacity and the 33rd described electric capacity is grounded, and the described the 15th The 32nd pin connection of the other end of resistance, the 8th pin of the second described audio decoder and the second described radio frequency chip, it is described The 13rd resistance the other end, the 9th pin of the second described audio decoder and the second described radio frequency chip the 33rd pin Connection, the other end of described the 14th resistance accesses 3.3V voltages, the 17th pin and the 21st of described the second audio decoder Pin is grounded, the 18th pin, the 24th pin, the 25th pin, one end of the 34th described electric capacity of described the second audio decoder 3.3V voltages are accessed with the connection of one end of the 35th described electric capacity, it is the other end of described the 34th electric capacity, described 26th pin of the other end of the 35th electric capacity and the second described audio decoder connects analog signal ground, the second described sound One end connection of the 31st pin and the 19th described inductance of frequency decoder, the other end of the 19th described inductance is penetrated with second The 8th pin connection of frequency chip, described the 32nd pin of the second audio decoder and one end of the 38th described electric capacity connects Enter 1.8V voltages, the other end ground connection of described the 38th electric capacity, the 19th pin of described the second audio decoder with it is described USB the 2nd pin by the 37th described capacitance connection, the 23rd pin of described the second audio decoder with it is described 3rd pin of USB accesses number by the 36th described capacitance connection, the 1st pin to the 5th pin of the second described audio decoder Word audio signal, the analog signal after the 2nd pin and the 3rd pin the output conversion of described USB.
Described low-noise amplifier includes the second power amplifier chips, the 18th resistance, the 16th electricity of model CC2590 Resistance, the 17th resistance, the 20th inductance, the 21st inductance, the 22nd inductance, the 23rd inductance, the 39th electric capacity, 40th electric capacity, the 41st electric capacity, the 42nd electric capacity, the 43rd electric capacity, the 44th electric capacity and the 45th electric capacity, 2nd pin of the second described power amplifier chips, the 4th pin, the 5th pin and the 6th pin output radiofrequency signal, described the second power amplifier chips 8th pin, the 9th pin, the 12nd pin and the 14th pin ground connection, the 7th pin of described the second power amplifier chips and the 16th described resistance One end connects, one end of described the 18th resistance, the other end of the 16th described resistance, the 42nd described electric capacity One end, one end of the 43rd described electric capacity, one end of the 44th described electric capacity, the one of the 45th described electric capacity End, one end of the 20th described inductance, the 10th pin of the second described power amplifier chips, the 13rd pin and the connection of the 16th pin, it is described The 18th resistance other end ground connection, the other end of described the 20th inductance accesses 3.3V voltages, the described the 42nd The other end of electric capacity, the other end of the 43rd described electric capacity, the other end of the 44th described electric capacity and described The other end of 45 electric capacity is grounded, and the 15th pin of the second described power amplifier chips passes through the 17th described resistance eutral grounding, One end connection of the 11st pin of the second described power amplifier chips and the 23rd described inductance, described the 23rd inductance One end connection of the other end, one end of the 39th described electric capacity and the 21st described inductance, the described the 21st One end connection of the other end of inductance and the 41st described electric capacity, it is the other end of described the 41st electric capacity, described One end of 40th electric capacity, one end of the 22nd described inductance and described wireless receiving antenna connection, the described the 3rd The other end of the other end of 19 electric capacity, the other end of the 40th described electric capacity and the 22nd described inductance is grounded.
The second described peripheral circuit includes the second crystal oscillator, the 20th resistance, the 19th resistance, the 47th electric capacity, the 48 electric capacity, the 49th electric capacity, the 50th electric capacity, the 51st electric capacity, the 52nd electric capacity, the 53rd electric capacity, 54 electric capacity, the 55th electric capacity, the 56th electric capacity, the 57th electric capacity, the 58th electric capacity, the 24th inductance, 25th inductance, the 26th inductance, the 27th inductance, the 28th inductance, the 29th inductance, the 30th inductance, 31st inductance, the 32nd inductance, the 33rd inductance, the 34th inductance, the 35th inductance, second switch and Two light emitting diodes, the 7th pin of the second described radio frequency chip is grounded by described second switch, the second described radio frequency core 10th pin of piece, the 12nd pin, the 18th pin, the 37th pin, one end of the 47th described electric capacity, the 48th described electric capacity One end, one end of the 55th described electric capacity, one end of the 57th described electric capacity and the 35th described inductance One end connects, the other end, the other end, the described the 55th of the 48th described electric capacity of described the 47th electric capacity The other end of the other end of electric capacity and the 57th described electric capacity is grounded, and the other end of the 35th described inductance is accessed 3.3V voltages, the 13rd pin of the second described radio frequency chip is connected with one end of the 24th described inductance, and described second 14th pin of radio frequency chip is connected with one end of the 25th described inductance, the 15th pin of described the second radio frequency chip and institute One end connection of the 26th inductance stated, the 16th pin and the one of the 27th described inductance of described the second radio frequency chip End connection, the 17th pin of the second described radio frequency chip is connected with one end of the 28th described inductance, and the described the 20th The other end of four inductance, the other end of the 25th described inductance, the other end of the 26th described inductance, described The other end output digital audio and video signals of the other end of 27 inductance and the 28th described inductance, the second described radio frequency One end connection of the 19th pin of chip and the 29th described inductance, the other end of described the 29th inductance with it is described The negative electrode connection of the second light emitting diode, the described anode of the second light emitting diode connects with one end of the 20th described resistance Connect, the other end of described the 20th resistance accesses 3.3V voltages, the 20th pin of described the second radio frequency chip, the 23rd pin, the 26 pin, the 27th pin, the 28th pin, the 31st pin, one end of the 49th described electric capacity, one end of the 52nd described electric capacity, One end of one end, one end of the 53rd described electric capacity and the 30th described inductance of the 54th described electric capacity connects Connect, the other end of described the 30th inductance accesses 3.3V voltages, the other end, the described the 5th of described the 49th electric capacity The other end of the other end of 12 electric capacity, the other end of the 53rd described electric capacity and the 54th described electric capacity connects Ground, one end of the 21st pin, one end of the 50th described electric capacity and the second described crystal oscillator of described the second radio frequency chip connects Connect, the one of the 22nd pin of described the second radio frequency chip, the other end of the second described crystal oscillator and the 51st described electric capacity End connection, the described other end of the 50th electric capacity and the other end of the 51st described electric capacity is grounded, and described second By the 19th described resistance eutral grounding, the 33rd pin of described the second radio frequency chip is by described for 30th pin of radio frequency chip 31st inductance is connected with the 9th pin of the first described audio decoder, and the 32nd pin of the second described radio frequency chip passes through The 32nd described inductance is connected with the 8th pin of the first described audio decoder, and the 36th of described the second radio frequency chip the Pin is connected with one end of the 33rd described inductance, the 38th pin of described the second radio frequency chip and the 34th described electricity One end connection of sense, the 39th pin of the second described radio frequency chip passes through the 58th described capacity earth, described second 40th pin of radio frequency chip is the other end of described the 34th inductance, described by the 56th described capacity earth 25th pin of the other end of the 33rd inductance, the 24th pin of the second described radio frequency chip and the second described radio frequency chip connects Enter radiofrequency signal.
Second voltage stabilizing chip and the 3rd voltage stabilizing chip of described second source management module including model TLV700, the 59 electric capacity, the 60th electric capacity, the 61st electric capacity, the 62nd electric capacity and the 63rd electric capacity, the second described voltage stabilizing 5V electricity is accessed in 1st pin of chip, the 3rd pin, one end of the 61st described electric capacity, one end of the 63rd described electric capacity Source, the 2nd pin of the second described voltage stabilizing chip is grounded, and the 5th pin of the second described voltage stabilizing chip exports 3.3V voltages, described One termination of the 1st pin of the 3rd voltage stabilizing chip, the 3rd pin, one end of the 59th described electric capacity and the 60th described electric capacity Enter 3.3V voltages, the 2nd pin ground connection of described the 3rd voltage stabilizing chip, the other end of described the 59th electric capacity, described the The other end of 60 electric capacity, the other end of the 61st described electric capacity, one end of the 62nd described electric capacity and described The other end of the 63rd electric capacity is grounded, the other end of described the 62nd electric capacity and the of the 3rd described voltage stabilizing chip 5 pin are connected and output 1.8V voltages.
Compared with prior art, the advantage of the invention is that the first signal processing circuit by model C C8520 the first radio frequency Chip and the first peripheral circuit are constituted, and secondary signal process circuit is by second radio frequency chip of model CC8520 and the second periphery Circuit is constituted, and the extraneous analoging sound signal of audio emitter middle pitch head pickup, analog-digital converter turns extraneous analoging sound signal Digital audio and video signals are changed to, the first radio frequency chip and the first peripheral circuit are processed the DAB digital audio and video signals Signal is converted to radiofrequency signal, and power amplifier is launched after power amplification is carried out to radiofrequency signal by wireless transmission antenna；Sound Wireless receiving antenna in frequency receiver receives the radiofrequency signal of wireless transmission antenna transmitting, and low-noise amplifier believes the radio frequency Number treatment after be input in the second radio frequency chip and the second peripheral circuit, secondary signal process circuit is processed radiofrequency signal The radiofrequency signal is converted into digital audio and video signals to be input in digital-to-analogue converter, digital-to-analogue converter changes digital audio and video signals To be exported after analog signal, the sound amplification function of wireless microphone is achieved in, the first signal processing circuit and secondary signal are processed Circuit thus reduces audio emitter and audio receiver using radio frequency chip and the peripheral circuit composition of model C C8520 Circuit volume, reduces component cost, makes wireless microphone cost relatively low, and small volume.
Brief description of the drawings
Fig. 1 is the theory diagram of audio emitter；
Fig. 2 is the circuit diagram of analog-digital converter；
Fig. 3 is the circuit diagram of the first signal processing circuit；
Fig. 4 is the circuit diagram of power amplifier；
Fig. 5 is the circuit diagram of the first power management module；
Fig. 6 is the theory diagram of audio receiver；
Fig. 7 is the circuit diagram of digital analog converter；
Fig. 8 is the circuit diagram of low-noise amplifier；
Fig. 9 is the circuit diagram of secondary signal process circuit；
Figure 10 is the circuit diagram of second source management module.
Specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment：As shown in figures 1 to 6, a kind of wireless microphone, including audio emitter and audio receiver, audio Transmitter includes being used for the first power management module for providing audio emitter operating voltage, the sound head, the modulus turn that are sequentially connected Parallel operation, the first signal processing circuit, power amplifier and wireless transmission antenna, audio receiver are included for providing audio reception The second source management module of device operating voltage, the wireless receiving antenna being sequentially connected, low-noise amplifier, secondary signal treatment Circuit and digital analog converter, it is characterised in that the first signal processing circuit is by the first radio frequency chip U2 of model C C8520 and first Peripheral circuit constitute, secondary signal process circuit by model CC8520 the second radio frequency chip U8 and the second peripheral circuit group Into the first signal processing circuit receives the digital audio and video signals of analog-digital converter output and is converted to the digital audio and video signals and penetrates After frequency signal in input power amplifier, power amplifier passes through wireless transmission antenna after the radiofrequency signal is carried out into power amplification Transmitting, wireless receiving antenna receives radiofrequency signal, and low-noise amplifier is input at secondary signal after the radiofrequency signal is amplified In reason circuit, radiofrequency signal is converted to digital audio and video signals by secondary signal process circuit, and digital analog converter believes DAB Exported after number being converted to analog signal.
In the present embodiment, as shown in Fig. 2 analog-digital converter includes first audio decoder of model TLV320AIC3101 Device U1, the first inductance L1, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electricity Hold C6, the 7th electric capacity C7, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4 and the 5th resistance R5, first 7th pin of audio decoder U1, one end of the first electric capacity C1, one end of the second electric capacity C2, one end of first resistor R1, the second electricity Hinder one end connection of one end and 3rd resistor R3 of R2, the 6th pin of the first audio decoder U1, the other end of the first electric capacity C1 and The other end of the second electric capacity C2 is grounded, the other end of first resistor R1, the 8th pin and the first radio frequency of the first audio decoder U1 The 32nd pin connection of chip U2, the other end of second resistance R2, the 9th pin and the first radio frequency chip U2 of the first audio decoder U1 The connection of the 33rd pin, the other end of 3rd resistor R3 accesses 3.3V voltages, and the 12nd pin of the first audio decoder U1 is electric with the 3rd Hold one end connection of C3, the other end of the 3rd electric capacity C3 and one end of the 4th resistance R4 connect and its connection end is analog-digital converter Inversion signal input, the inverting input with sound head is connected, the other end of the 4th resistance R4 and the first audio decoder U1 The connection of the 15th pin, the 13rd pin of the first audio decoder U1 is connected with one end of the 4th electric capacity C4, and the 4th electric capacity C4's is another One end of end and the 5th resistance R5 connect and its connection end is the positive signal input part of analog-digital converter, and the positive with sound head is defeated Enter end connection, the other end ground connection of the 5th resistance R5, the 17th pin and the 21st pin of the first audio decoder U1 are grounded, the first sound 18th pin of frequency decoder U1, the 24th pin, the 25th pin, one end connection of one end of the 6th electric capacity C6 and the 7th electric capacity C7 are accessed 3.3V voltages, the 26th pin of the other end, the other end of the 7th electric capacity C7 and the first audio decoder U1 of the 6th electric capacity C6 connects Ground, one end connection of the 31st pin and the first inductance L1 of the first audio decoder U1, the other end of the first inductance L1 is penetrated with first 1.8V voltages are accessed in the 8th pin connection of frequency chip U2, the 32nd pin of the first audio decoder U1 and one end of the 5th electric capacity C5, The other end ground connection of the 5th electric capacity C5, the DAB letter after the 1st pin to the 5th pin output conversion of the first audio decoder U1 Number.
In the present embodiment, as shown in figure 3, the first peripheral circuit includes the first crystal oscillator Y1, the 6th resistance R6, the 7th resistance R7, the 8th electric capacity C8, the 9th electric capacity C9, the tenth electric capacity C10, the 11st electric capacity C11, the 12nd electric capacity C12, the 13rd electric capacity C13, the 14th electric capacity C14, the 15th electric capacity C15, the 16th electric capacity C16, the 17th electric capacity C17, the 18th electric capacity C18, 19 electric capacity C19, the second inductance L2, the 3rd inductance L3, the 4th inductance L4, the 5th inductance L5, the 6th inductance L6, the 7th inductance L7, the 8th inductance L8, the 9th inductance L9, the tenth inductance L10, the 11st inductance L11, the 12nd inductance L12, the 13rd inductance L13, first switch S1 and the first LED 1, the 7th pin of the first radio frequency chip U2 are grounded by first switch S1, the 10th pin of one radio frequency chip U2, the 12nd pin, the 18th pin, the 37th pin, one end of the 8th electric capacity C8, one end of the 9th electric capacity C9, One end connection of one end, one end of the 18th electric capacity C18 and the 13rd inductance L13 of the tenth electric capacity C10, the 8th electric capacity C8's is another One end, the other end of the 9th electric capacity C9, the other end of the tenth electric capacity C10 and the other end of the 18th electric capacity C18 are grounded, and the tenth The other end of three inductance L13 accesses 3.3V voltages, and the 13rd pin of the first radio frequency chip U2 is connected with one end of the second inductance L2, the 14th pin of one radio frequency chip U2 is connected with one end of the 3rd inductance L3, the 15th pin and the 4th inductance L4 of the first radio frequency chip U2 One end connection, the 16th pin of the first radio frequency chip U2 is connected with one end of the 5th inductance L5, the 17th of the first radio frequency chip U2 the Pin is connected with one end of the 6th inductance L6, the other end of the second inductance L2, the other end of the 3rd inductance L3, the 4th inductance L4 it is another The other end of one end, the other end of the 5th inductance L5 and the 6th inductance L6 receives digital audio and video signals, the first radio frequency chip U2's The negative electrode of one end connection of the 19th pin and the 7th inductance L7, the other end of the 7th inductance L7 and the first LED 1 connects Connect, the anode of the first LED 1 is connected with one end of the 6th resistance R6, the other end of the 6th resistance R6 accesses 3.3V Voltage, the 20th pin, the 23rd pin, the 26th pin, the 27th pin, the 28th pin, the 31st pin, the 11st electric capacity C11 of the first radio frequency chip U2 One end, one end of the 14th electric capacity C14, one end of the 16th electric capacity C16, one end of the 15th electric capacity C15 and the 8th inductance One end connection of L8, the other end of the 8th inductance L8 accesses 3.3V voltages, the other end of the 11st electric capacity C11, the 14th electric capacity The other end of the other end of C14, the other end of the 15th electric capacity C15 and the 16th electric capacity C16 is grounded, the first radio frequency chip U2 The 21st pin, one end of the 12nd electric capacity C12 and the first crystal oscillator Y1 one end connection, the 22nd pin of the first radio frequency chip U2, the One end connection of the other end and the 13rd electric capacity C13 of one crystal oscillator Y1, the other end and the 13rd electric capacity of the 12nd electric capacity C12 The other end of C13 is grounded, and the 30th pin of the first radio frequency chip U2 is grounded by the 7th resistance R7, and the of the first radio frequency chip U2 33 pin are connected by the 9th inductance L9 with the 9th pin of the first audio decoder U1, and the 32nd pin of the first radio frequency chip U2 is by the Ten inductance L10 are connected with the 8th pin of the first audio decoder U1, the 36th pin and the 12nd inductance L12 of the first radio frequency chip U2 One end connection, the 38th pin of the first radio frequency chip U2 is connected with one end of the 11st inductance L11, the of the first radio frequency chip U2 39 pin are grounded by the 19th electric capacity C19, and the 40th pin of the first radio frequency chip U2 is grounded by the 17th electric capacity C17, and the 11st The other end of inductance L11, the other end of the 12nd inductance L12, the 24th pin and the first radio frequency chip U2 of the first radio frequency chip U2 The 25th pin output radiofrequency signal.
In the present embodiment, as shown in figure 4, power amplifier includes the first power amplifier chips U3, the tenth of model CC2590 Resistance R10, the 8th resistance R8, the 9th resistance R9, the 14th inductance L14, the 15th inductance L15, the 16th inductance L16, the tenth Seven inductance L17, the 20th electric capacity C20, the 21st electric capacity C21, the 22nd electric capacity C22, the 23rd electric capacity C23, second 14 electric capacity C24, the 25th electric capacity C25 and the 26th electric capacity C26, the 2nd pin, the 4th pin, the 5th of the first power amplifier chips U3 Pin and the 6th pin access the radiofrequency signal of the first signal processing circuit output, the 8th pin, the 9th pin, the 12nd of the first power amplifier chips U3 Pin and the 14th pin are grounded, one end connection of the 7th pin, one end of the tenth resistance R10 and the 8th resistance R8 of the first power amplifier chips U3, The other end ground connection of the tenth resistance R10, the other end of the 8th resistance R8, one end of the 23rd electric capacity C23, the 24th electric capacity One end of C24, one end of the 25th electric capacity C25, one end of the 26th electric capacity C26, one end of the 17th inductance L17, 10th pin of one power amplifier chips U3, the 13rd pin and the 16th pin connection, the other end of the 17th inductance L17 access 3.3V voltages, the The other end of 23 electric capacity C23, the other end of the 24th electric capacity C24, the other end and the 20th of the 25th electric capacity C25 The other end of six electric capacity C26 is grounded, and the 15th pin of the first power amplifier chips U3 is grounded by the 9th resistance R9, the first power amplifier chips One end connection of the 11st pin and the 14th inductance L14 of U3, the other end of the 14th inductance L14, one end of the 20th electric capacity C20 One end with the 15th inductance L15 connects, one end connection of the other end and the 22nd electric capacity C22 of the 15th inductance L15, the The other end of 22 electric capacity C22, one end of the 21st electric capacity C21, one end of the 16th inductance L16 and wireless transmission antenna Connection, the other end of the 20th electric capacity C20, the other end of the 21st electric capacity C21 and the other end of the 16th inductance L16 connect Ground.
In the present embodiment, as shown in figure 5, the first power management module includes first Power convert of model TLV61220 Device U4, the first voltage stabilizing chip U5 of model TLV700, the 12nd resistance R12, the 11st resistance R11, the 18th inductance L18, 27th electric capacity C27, the 28th electric capacity C28, the 29th electric capacity C29, the 30th electric capacity C30 and the 31st electric capacity C31, the 1st pin of the first power supply changeover device U4 is connected with one end of the 18th inductance L18, the other end of the 18th inductance L18, The 6th pin connection of one end of 31 electric capacity C31 and the first power supply changeover device U4 and access positive source, the 31st electric capacity The other end ground connection of C31, the 2nd pin ground connection of the first power supply changeover device U4, the 3rd pin of the first power supply changeover device U4 accesses power supply and bears Pole, one end connection of the 4th pin, one end of the 12nd resistance R12 and the 11st resistance R11 of the first power supply changeover device U4, the tenth One end connection of the other end of two resistance R12, the 5th pin of the first power supply changeover device U4 and the 30th electric capacity C30 and output 3.3V Voltage, the other end of the 30th electric capacity C30 and the other end of the 11st resistance R11 are grounded, and the 1st of the first voltage stabilizing chip U5 the One end connection of pin, the 3rd pin, one end of the 28th electric capacity C28 and the 29th electric capacity C29 and its connection end access 3.3V electricity Pressure, the 2nd pin ground connection of the first voltage stabilizing chip U5, the other end of the 28th electric capacity C28, the other end of the 29th electric capacity C29 One end with the 27th electric capacity C27 is grounded, the 5th pin of the other end of the 27th electric capacity C27 and the first voltage stabilizing chip U5 Connection and output 1.8V voltages.
In the present embodiment, as shown in fig. 7, digital analog converter includes second audio of USB interface USB1, LV320AIC3101 Decoder U6, the 19th inductance L19, the 32nd electric capacity C32, the 33rd electric capacity C33, the 36th electric capacity C36, the 30th Seven electric capacity C37, the 38th electric capacity C38, the 34th electric capacity C34, the 35th electric capacity C35, the 15th resistance R15, the tenth Three resistance R13 and the 14th resistance R14, the 7th pin, one end, the 30th of the 32nd electric capacity C32 of the second audio decoder U6 One end of three electric capacity C33, one end of one end, one end of the 13rd resistance R13 and the 14th resistance R14 of the 15th resistance R15 Connection, the other end of the 6th pin, the other end of the 32nd electric capacity C32 and the 33rd electric capacity C33 of the second audio decoder U6 It is grounded, the 32nd pin of the other end of the 15th resistance R15, the 8th pin of the second audio decoder U6 and the second radio frequency chip U8 Connection, the 33rd pin of the other end of the 13rd resistance R13, the 9th pin of the second audio decoder U6 and the second radio frequency chip U8 connects Connect, the other end of the 14th resistance R14 accesses 3.3V voltages, and the 17th pin and the 21st pin of the second audio decoder U6 are grounded, 18th pin of the second audio decoder U6, the 24th pin, the 25th pin, one end of the 34th electric capacity C34 and the 35th electric capacity C35 One end connection access 3.3V voltages, the other end of the 34th electric capacity C34, the other end and second of the 35th electric capacity C35 26th pin of audio decoder U6 connects analog signal ground, the 31st pin of the second audio decoder U6 and the 19th inductance L19's One end connects, and the other end of the 19th inductance L19 is connected with the 8th pin of the second radio frequency chip U8, the second audio decoder U6's Access 1.8V voltages, the other end ground connection of the 38th electric capacity C38, second in one end of 32nd pin and the 38th electric capacity C38 19th pin of audio decoder U6 is connected with the 2nd pin of USB by the 37th electric capacity C37, and the of the second audio decoder U6 23 pin are connected with the 3rd pin of USB by the 36th electric capacity C36, and the 1st pin to the 5th pin of the second audio decoder U6 accesses number Analog signal after word audio signal, the 2nd pin of USB and the output conversion of the 3rd pin.
In the present embodiment, as shown in figure 8, the second power amplifier chips U7 of low-noise amplifier including model CC2590, the 18 resistance R18, the 16th resistance R16, the 17th resistance R17, the 20th inductance L20, the 21st inductance L21, the 20th Two inductance L22, the 23rd inductance L23, the 39th electric capacity C39, the 40th electric capacity C40, the 41st electric capacity C41, the 4th 12 electric capacity C42, the 43rd electric capacity C43, the 44th electric capacity C44 and the 45th electric capacity C45, the second power amplifier chips U7's 2nd pin, the 4th pin, the 5th pin and the 6th pin output radiofrequency signal, the 8th pin, the 9th pin, the 12nd pin and the 14th of the second power amplifier chips U7 Pin is grounded, one end connection of the 7th pin of the second power amplifier chips U7 and the 16th resistance R16, one end of the 18th resistance R18, the The other end of 16 resistance R16, one end of the 42nd electric capacity C42, one end of the 43rd electric capacity C43, the 44th electric capacity One end of C44, one end of the 45th electric capacity C45, one end of the 20th inductance L20, the 10th pin of the second power amplifier chips U7, 13 pin and the 16th pin are connected, and the other end ground connection of the 18th resistance R18, the other end of the 20th inductance L20 accesses 3.3V voltages, The other end of the 42nd electric capacity C42, the other end of the 43rd electric capacity C43, the other end and the 4th of the 44th electric capacity C44 The other end of 15 electric capacity C45 is grounded, and the 15th pin of the second power amplifier chips U7 is grounded by the 17th resistance R17, the second work( Put one end connection of the 11st pin and the 23rd inductance L23 of chip U7, the other end, the 39th of the 23rd inductance L23 One end connection of one end of electric capacity C39 and the 21st inductance L21, the other end of the 21st inductance L21 and the 41st electricity Hold one end connection of C41, the other end of the 41st electric capacity C41, one end of the 40th electric capacity C40, the 22nd inductance L22 One end and wireless receiving antenna are connected, the other end of the 39th electric capacity C39, the other end and the 20th of the 40th electric capacity C40 The other end of two inductance L22 is grounded.
In the present embodiment, as shown in figure 9, the second peripheral circuit includes the second crystal oscillator Y2, the 20th resistance R20, the 19th Resistance R19, the 47th electric capacity C47, the 48th electric capacity C48, the 49th electric capacity C49, the 50th electric capacity C50, the 50th One electric capacity C51, the 52nd electric capacity C52, the 53rd electric capacity C53, the 54th electric capacity C54, the 55th electric capacity C55, 56 electric capacity C56, the 57th electric capacity C57, the 58th electric capacity C58, the 24th inductance L24, the 25th inductance L25, the 26th inductance L26, the 27th inductance L27, the 28th inductance L28, the 29th inductance L29, the 30th electricity Sense L30, the 31st inductance L31, the 32nd inductance L32, the 33rd inductance L33, the 34th inductance L34, the 30th Five inductance L35, second switch S2 and the second LED 2, the 7th pin of the second radio frequency chip U8 pass through second switch S2 Ground connection, the 10th pin, the 12nd pin, the 18th pin, the 37th pin, one end, the 40th of the 47th electric capacity C47 of the second radio frequency chip U8 One end of eight electric capacity C48, one end of the 55th electric capacity C55, one end of the 57th electric capacity C57 and the 35th inductance L35 One end connection, the other end of the 47th electric capacity C47, the other end of the 48th electric capacity C48, the 55th electric capacity C55 The other end of the other end and the 57th electric capacity C57 is grounded, and the other end of the 35th inductance L35 accesses 3.3V voltages, the 13rd pin of two radio frequency chip U8 is connected with one end of the 24th inductance L24, the 14th pin and second of the second radio frequency chip U8 One end connection of 15 inductance L25, the 15th pin of the second radio frequency chip U8 is connected with one end of the 26th inductance L26, and second 16th pin of radio frequency chip U8 is connected with one end of the 27th inductance L27, the 17th pin and the 20th of the second radio frequency chip U8 One end connection of eight inductance L28, the other end of the 24th inductance L24, the other end, the 26th of the 25th inductance L25 The other end output DAB of the other end of inductance L26, the other end of the 27th inductance L27 and the 28th inductance L28 Signal, one end connection of the 19th pin and the 29th inductance L29 of the second radio frequency chip U8, the 29th inductance L29's is another End is connected with the negative electrode of the second LED 2, the anode of the second LED 2 and the one of the 20th resistance R20 End connection, the other end of the 20th resistance R20 accesses 3.3V voltages, the 20th pin, the 23rd pin, the 26th of the second radio frequency chip U8 Pin, the 27th pin, the 28th pin, the 31st pin, one end of the 49th electric capacity C49, one end, the 54th of the 52nd electric capacity C52 One end connection of one end of electric capacity C54, one end of the 53rd electric capacity C53 and the 30th inductance L30, the 30th inductance L30's The other end accesses 3.3V voltages, the other end of the 49th electric capacity C49, the other end of the 52nd electric capacity C52, the 53rd electricity The other end of the other end and the 54th electric capacity C54 that hold C53 is grounded, the 21st pin of the second radio frequency chip U8, the 50th electricity Hold one end connection of one end and the second crystal oscillator Y2 of C50, the 22nd pin of the second radio frequency chip U8, the other end of the second crystal oscillator Y2 and One end connection of the 51st electric capacity C51, the other end of the 50th electric capacity C50 and the other end of the 51st electric capacity C51 connect Ground, the 30th pin of the second radio frequency chip U8 is grounded by the 19th resistance R19, and the 33rd pin of the second radio frequency chip U8 passes through the 3rd 11 inductance L31 are connected with the 9th pin of the first audio decoder U1, and the 32nd pin of the second radio frequency chip U8 is by the 32nd electricity Sense L32 is connected with the 8th pin of the first audio decoder U1, the 36th pin of the second radio frequency chip U8 and the 33rd inductance L33's One end connects, and the 38th pin of the second radio frequency chip U8 is connected with one end of the 34th inductance L34, and the of the second radio frequency chip U8 39 pin are grounded by the 58th electric capacity C58, and the 40th pin of the second radio frequency chip U8 is grounded by the 56th electric capacity C56, the The other end of 34 inductance L34, the other end of the 33rd inductance L33, the 24th pin and second of the second radio frequency chip U8 are penetrated The 25th pin incoming radio frequency signal of frequency chip U8.
In the present embodiment, as shown in Figure 10, second source management module includes second voltage stabilizing chip of model TLV700 U9 and the 3rd voltage stabilizing chip U10, the 59th electric capacity C59, the 60th electric capacity C60, the 61st electric capacity C61, the 62nd electricity Hold C62 and the 63rd electric capacity C63, the 1st pin, the 3rd pin, one end, the 6th of the 61st electric capacity C61 of the second voltage stabilizing chip U9 5V power supplys are accessed in one end of 13 electric capacity C63, and the 2nd pin ground connection of the second voltage stabilizing chip U9, the 5th pin of the second voltage stabilizing chip U9 is defeated Go out 3.3V voltages, the 1st pin of the 3rd voltage stabilizing chip U10, the 3rd pin, one end of the 59th electric capacity C59 and the 60th electric capacity C60 One end access 3.3V voltages, the 3rd voltage stabilizing chip U10 the 2nd pin ground connection, the other end, the 60th of the 59th electric capacity C59 The other end of electric capacity C60, the other end of the 61st electric capacity C61, one end of the 62nd electric capacity C62 and the 63rd electric capacity The other end of C63 is grounded, the connection of the 5th pin and output of the other end and the 3rd voltage stabilizing chip U10 of the 62nd electric capacity C62 1.8V voltages.
The operation principle of the wireless microphone of the present embodiment is:The extraneous simulated sound message of audio emitter middle pitch head pickup Number, and the analoging sound signal is transferred to analog-digital converter, analoging sound signal is converted to DAB by analog-digital converter The first signal processing circuit is transferred to after signal, first radio frequency chip and the first peripheral circuit of model CC8520 are first by numeral Audio signal is amplified, and then constitutes clock by the first crystal oscillator Y1, the 22nd electric capacity C22 and the 23rd electric capacity C23 Oscillator, the clock signal of clock oscillator output as the first signal processing circuit high-frequency carrier signal, thus first Radio frequency chip and the first peripheral circuit carry out digital modulation, first time High frequency amplification and second to the audio signal after amplification successively Radiofrequency signal is produced after secondary High frequency amplification and is conveyed to power amplifier, the first power amplifier chips U3, the tenth resistance in power amplifier R10, the 8th resistance R8, the 9th resistance R9, the 14th inductance L14, the 15th inductance L15, the 16th inductance L16, the 17th electricity Sense L17, the 20th electric capacity C20, the 21st electric capacity C21, the 22nd electric capacity C22, the 23rd electric capacity C23, the 24th Electric capacity C24, the 25th electric capacity C25 and the 26th electric capacity C26 amplify radiofrequency signal after filtering the noise in radiofrequency signal Sent by wireless transmission antenna afterwards；Wireless receiving antenna in audio receiver receives the radio frequency letter that wireless transmission antenna sends Number and the radiofrequency signal is sent to low-noise amplifier, second power amplifier chips of model CC2590 in low-noise amplifier U7, the 18th resistance R18, the 16th resistance R16, the 17th resistance R17, the 20th inductance L20, the 21st inductance L21, 22 inductance L22, the 23rd inductance L23, the 39th electric capacity C39, the 40th electric capacity C40, the 41st electric capacity C41, 42nd electric capacity C42, the 43rd electric capacity C43, the 44th electric capacity C44 and the 45th electric capacity C45 filter radiofrequency signal Be transferred to secondary signal process circuit after radiofrequency signal is amplified after interior noise, second radio frequency chip of model CC8520 and In second peripheral circuit, the second crystal oscillator Y2, the 50th electric capacity C50 and the 51st electric capacity C51 constitute clock oscillator, the clock Oscillator output clock signal as secondary signal process circuit local oscillator, thus outside the second radio frequency chip and second Enclose circuit radiofrequency signal is carried out successively High frequency filter, digital mixing, intermediate frequency amplify and digital demodulation obtain audio signal output, Digital analog converter is exported after the audio signal is converted into analoging sound signal, realizes the function of wireless microphone.

Claims (8)

1. a kind of wireless microphone, including audio emitter and audio receiver, described audio emitter are included for providing First power management module of described audio emitter operating voltage, sound head, analog-digital converter, the power amplification being sequentially connected Device and wireless transmission antenna, described audio receiver include the second electricity for providing described audio receiver operating voltage Source control module, the wireless receiving antenna being sequentially connected, low-noise amplifier, secondary signal process circuit and digital analog converter, It is characterized in that described analog-digital converter and described power amplifier are connected by the first signal processing circuit, described the One signal processing circuit is made up of first radio frequency chip and the first peripheral circuit of model C C8520, described low-noise amplifier Connected by secondary signal process circuit with described digital analog converter, described secondary signal process circuit is by model Second radio frequency chip of CC8520 and the second peripheral circuit are constituted, and the first described signal processing circuit receives described modulus and turns The digital audio and video signals are simultaneously converted to described power amplifier are input into after radiofrequency signal by the digital audio and video signals of parallel operation output In, described power amplifier is launched after the radiofrequency signal is carried out into power amplification by wireless transmission antenna, and described is wireless Reception antenna receives radiofrequency signal, and described low-noise amplifier is input to described secondary signal after the radiofrequency signal is amplified In process circuit, radiofrequency signal is converted to digital audio and video signals by described secondary signal process circuit, and digital analog converter is by number Word audio signal is exported after being converted to analog signal；
Described analog-digital converter includes the first audio decoder, the first inductance, first electricity of model TLV320AIC3101 Appearance, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, first resistor, second resistance, Three resistance, the 4th resistance and the 5th resistance, the 7th pin, one end of the first described electric capacity, the institute of described the first audio decoder One end of the second electric capacity stated, one end of described first resistor, one end of described second resistance and described 3rd resistor One end connection, the 6th pin of described the first audio decoder, the other end of the first described electric capacity and the second described electric capacity The other end be grounded, the other end, the 8th pin and described first of the first described audio decoder of described first resistor The 32nd pin connection of radio frequency chip, the other end of described second resistance, the 9th pin of the first described audio decoder and described The first radio frequency chip the connection of the 33rd pin, the other end of described 3rd resistor accesses 3.3V voltages, the first described audio 12nd pin of decoder is connected with one end of the 3rd described electric capacity, the other end of described the 3rd electric capacity and the 4th described electricity One end of resistance connects and its connection end is the inversion signal input of described analog-digital converter, and the inverting input with sound head connects Connect, the other end of the 4th described resistance is connected with the 15th pin of the first described audio decoder, the first described audio solution 13rd pin of code device is connected with one end of the 4th described electric capacity, the other end and the 5th described resistance of described the 4th electric capacity One end connection and its connection end be described analog-digital converter positive signal input part, the positive with described sound head is input into End connection, the other end ground connection of described the 5th resistance, the 17th pin and the 21st pin of described the first audio decoder are grounded, 18th pin of the first described audio decoder, the 24th pin, the 25th pin, one end of the 6th described electric capacity and the 7th described electricity One end connection of appearance accesses 3.3V voltages, the other end of described the 6th electric capacity, the other end of the 7th described electric capacity and described The 26th pin of the first audio decoder be grounded, the 31st pin of described the first audio decoder and the first described inductance One end connects, and the described other end of the first inductance is connected with the 8th pin of the first radio frequency chip, the first described audio decoder The 32nd pin and one end of the 5th described electric capacity access 1.8V voltages, the other end ground connection of described the 5th electric capacity is described The first audio decoder the 1st pin to the 5th pin output conversion after digital audio and video signals.
2. a kind of wireless microphone according to claim 1, it is characterised in that the first described peripheral circuit includes first Crystal oscillator, the 6th resistance, the 7th resistance, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity, the 11st electric capacity, the 12nd electric capacity, the tenth Three electric capacity, the 14th electric capacity, the 15th electric capacity, the 16th electric capacity, the 17th electric capacity, the 18th electric capacity, the 19th electric capacity, second Inductance, the 3rd inductance, the 4th inductance, the 5th inductance, the 6th inductance, the 7th inductance, the 8th inductance, the 9th inductance, the tenth inductance, 11st inductance, the 12nd inductance, the 13rd inductance, first switch and the first light emitting diode, the first described radio frequency chip The 7th pin be grounded by described first switch, the 10th pin, the 12nd pin, the 18th pin, the 37th of described the first radio frequency chip Pin, one end of the 8th described electric capacity, one end of the 9th described electric capacity, one end, the described the tenth of the tenth described electric capacity One end connection of one end of eight electric capacity and the 13rd described inductance, the other end of described the 8th electric capacity, the 9th described electricity The other end of the other end of appearance, the other end of the tenth described electric capacity and the 18th described electric capacity is grounded, and the described the tenth The other end of three inductance accesses 3.3V voltages, and described the 13rd pin of the first radio frequency chip connects with one end of the second described inductance Connect, the 14th pin of the first described radio frequency chip is connected with one end of the 3rd described inductance, described the first radio frequency chip 15th pin is connected with one end of the 4th described inductance, the 16th pin and the 5th described inductance of described the first radio frequency chip One end connects, and the 17th pin of the first described radio frequency chip is connected with one end of the 6th described inductance, the second described inductance The other end, the other end of the 3rd described inductance, the other end of the 4th described inductance, the other end of the 5th described inductance Digital audio and video signals are received with the other end of the 6th described inductance, the 19th pin of described the first radio frequency chip and described the One end connection of seven inductance, the other end of the 7th described inductance is connected with the negative electrode of the first described light emitting diode, described The anode of the first light emitting diode be connected with one end of the 6th described resistance, the other end of the 6th described resistance is accessed 3.3V voltages, it is the 20th pin of described the first radio frequency chip, the 23rd pin, the 26th pin, the 27th pin, the 28th pin, the 31st pin, described One end of 11st electric capacity, one end of the 14th described electric capacity, one end of the 16th described electric capacity, the 15th described electricity One end connection of one end of appearance and the 8th described inductance, the other end of the 8th described inductance accesses 3.3V voltages, described The other end of the 11st electric capacity, the other end of the 14th described electric capacity, the other end of the 15th described electric capacity and described The other end of the 16th electric capacity is grounded, the 21st pin of described the first radio frequency chip, one end of the 12nd described electric capacity and One end connection of the first described crystal oscillator, the 22nd pin of described the first radio frequency chip, the other end of the first described crystal oscillator and One end connection of the 13rd described electric capacity, the other end and the other end of the 13rd described electric capacity of described the 12nd electric capacity Be grounded, the 30th pin of described the first radio frequency chip by the 7th described resistance eutral grounding, described the first radio frequency chip 33rd pin is connected by the 9th described inductance with the 9th pin of the first described audio decoder, the first described radio frequency chip The 32nd pin be connected with the 8th pin of the first described audio decoder by the tenth described inductance, the first described radio frequency core 36th pin of piece is connected with one end of the 12nd described inductance, the 38th pin and the described the tenth of described the first radio frequency chip One end connection of one inductance, the 39th pin of described the first radio frequency chip by the 19th described capacity earth, described the 40th pin of one radio frequency chip by the 17th described capacity earth, the other end of described the 11st inductance, described the The 25th pin output of the other end of 12 inductance, the 24th pin of the first described radio frequency chip and the first described radio frequency chip is penetrated Frequency signal.
3. a kind of wireless microphone according to claim 2, it is characterised in that described power amplifier includes model First power amplifier chips, the tenth resistance, the 8th resistance, the 9th resistance, the 14th inductance, the 15th inductance, the 16th of CC2590 Inductance, the 17th inductance, the 20th electric capacity, the 21st electric capacity, the 22nd electric capacity, the 23rd electric capacity, the 24th electricity Hold, the 25th electric capacity and the 26th electric capacity, the 2nd pin of described the first power amplifier chips, the 4th pin, the 5th pin and the 6th pin connect Enter the radiofrequency signal of described the first signal processing circuit output, the 8th pin, the 9th pin, the 12nd pin of described the first power amplifier chips With the 14th pin ground connection, the 7th pin of described the first power amplifier chips, one end of the tenth described resistance and the 8th described resistance One end connects, the other end ground connection of described the tenth resistance, the other end, the 23rd described electric capacity of described the 8th resistance One end, one end of the 24th described electric capacity, one end of the 25th described electric capacity, the 26th described electric capacity The connection of one end, one end of the 17th described inductance, the 10th pin of the first described power amplifier chips, the 13rd pin and the 16th pin, institute The other end of the 17th inductance stated accesses 3.3V voltages, the other end, the described the 24th of described the 23rd electric capacity The other end of the other end of electric capacity, the other end of the 25th described electric capacity and the 26th described electric capacity is grounded, institute 15th pin of the first power amplifier chips stated by the 9th described resistance eutral grounding, the 11st pin of described the first power amplifier chips and institute One end connection of the 14th inductance stated, the other end of described the 14th inductance, one end of the 20th described electric capacity and institute One end connection of the 15th inductance stated, the described other end of the 15th inductance and one end of the 22nd described electric capacity connects Connect, the other end, one end of the 21st described electric capacity, one end of the 16th described inductance of described the 22nd electric capacity Connected with described wireless transmission antenna, the other end, the other end of the 21st described electric capacity of described the 20th electric capacity The other end with the 16th described inductance is grounded.
4. a kind of wireless microphone according to claim 3, it is characterised in that the first described power management module includes First power supply changeover device of model TLV61220, first voltage stabilizing chip of model TLV700, the 12nd resistance, the 11st electricity Resistance, the 18th inductance, the 27th electric capacity, the 28th electric capacity, the 29th electric capacity, the 30th electric capacity and the 31st electricity Hold, the 1st pin of the first described power supply changeover device is connected with one end of the 18th described inductance, described the 18th inductance 6th pin of the other end, one end of the 31st described electric capacity and the first described power supply changeover device is connected and accesses power supply just Pole, the other end of the 31st described electric capacity is grounded, and the 2nd pin of the first described power supply changeover device is grounded, and described first 3rd pin of power supply changeover device accesses power cathode, the 4th pin of described the first power supply changeover device, the 12nd described resistance One end connection of one end and the 11st described resistance, the other end, the first described Power convert of described the 12nd resistance One end connection of the 5th pin of device and the 30th described electric capacity and output 3.3V voltages, the other end of described the 30th electric capacity The other end with the 11st described resistance is grounded, the 1st pin, the 3rd pin, the described the 20th of described the first voltage stabilizing chip One end connection of one end of eight electric capacity and the 29th described electric capacity and its connection end access 3.3V voltages, described first are steady Press the 2nd pin ground connection of chip, the other end of described the 28th electric capacity, the other end of the 29th described electric capacity and described One end of the 27th electric capacity be grounded, the other end of described the 27th electric capacity and the of the first described voltage stabilizing chip 5 pin are connected and output 1.8V voltages.
5. a kind of wireless microphone according to claim 1, it is characterised in that described digital analog converter connects including USB Mouth, second audio decoder of LV320AIC3101, the 19th inductance, the 32nd electric capacity, the 33rd electric capacity, the 36th Electric capacity, the 37th electric capacity, the 38th electric capacity, the 34th electric capacity, the 35th electric capacity, the 15th resistance, the 13rd electricity Resistance and the 14th resistance, the 7th pin of described the second audio decoder, one end of the 32nd described electric capacity, described the One end of 33 electric capacity, one end of the 15th described resistance, one end and the described the 14th of the 13rd described resistance One end connection of resistance, the 6th pin of described the second audio decoder, the other end of the 32nd described electric capacity and described The other end of the 33rd electric capacity is grounded, the other end, the 8th of the second described audio decoder the of described the 15th resistance The 32nd pin connection of pin and the second described radio frequency chip, the other end, the second described audio solution of described the 13rd resistance The 33rd pin connection of the 9th pin and the second described radio frequency chip of code device, the other end of the 14th described resistance accesses 3.3V Voltage, the 17th pin and the 21st pin of described the second audio decoder are grounded, the 18th pin of described the second audio decoder, One end connection of the 24th pin, the 25th pin, one end of the 34th described electric capacity and the 35th described electric capacity accesses 3.3V Voltage, the other end of described the 34th electric capacity, the other end of the 35th described electric capacity and the second described audio solution 26th pin of code device connects analog signal ground, the 31st pin of described the second audio decoder and the one of the 19th described inductance End connection, the described other end of the 19th inductance is connected with the 8th pin of the second radio frequency chip, the second described audio decoder The 32nd pin and one end of the 38th described electric capacity access 1.8V voltages, another termination of described the 38th electric capacity Ground, described the 19th pin of the second audio decoder passes through the 37th described capacitance connection with the 2nd pin of described USB, Three ten six capacitance connection of 23rd pin of the second described audio decoder with the 3rd pin of described USB described in, it is described The second audio decoder the 1st pin to the 5th pin incoming digital audio signal, the 2nd pin and the 3rd the pin output of described USB turns Analog signal after changing.
6. a kind of wireless microphone according to claim 5, it is characterised in that described low-noise amplifier includes model It is the second power amplifier chips, the 18th resistance, the 16th resistance, the 17th resistance, the 20th inductance, the 21st electricity of CC2590 Sense, the 22nd inductance, the 23rd inductance, the 39th electric capacity, the 40th electric capacity, the 41st electric capacity, the 42nd electricity Appearance, the 43rd electric capacity, the 44th electric capacity and the 45th electric capacity, the 2nd pin, the 4th pin, of described the second power amplifier chips 5 pin and the 6th pin output radiofrequency signal, the 8th pin of described the second power amplifier chips, the 9th pin, the 12nd pin and the 14th pin ground connection, institute One end connection of the 7th pin of the second power amplifier chips stated and the 16th described resistance, one end, the institute of described the 18th resistance It is the other end of the 16th resistance stated, one end of the 42nd described electric capacity, one end of the 43rd described electric capacity, described The 44th electric capacity one end, one end of the 45th described electric capacity, one end of the 20th described inductance, described The connection of 10th pin of two power amplifier chips, the 13rd pin and the 16th pin, the other end ground connection of described the 18th resistance, described second The other end of ten inductance accesses 3.3V voltages, the other end of described the 42nd electric capacity, the 43rd described electric capacity it is another The other end of one end, the other end of the 44th described electric capacity and the 45th described electric capacity is grounded, and described second 15th pin of power amplifier chips by the 17th described resistance eutral grounding, the 11st pin of described the second power amplifier chips and described the One end connection of 23 inductance, the other end of described the 23rd inductance, one end of the 39th described electric capacity and institute One end connection of the 21st inductance stated, the other end of described the 21st inductance and the one of the 41st described electric capacity End connection, the other end of described the 41st electric capacity, one end of the 40th described electric capacity, the 22nd described inductance One end and the connection of described wireless receiving antenna, the other end of described the 39th electric capacity, the 40th described electric capacity it is another The other end of one end and the 22nd described inductance is grounded.
7. a kind of wireless microphone according to claim 5, it is characterised in that the second described peripheral circuit includes second Crystal oscillator, the 20th resistance, the 19th resistance, the 47th electric capacity, the 48th electric capacity, the 49th electric capacity, the 50th electric capacity, 51st electric capacity, the 52nd electric capacity, the 53rd electric capacity, the 54th electric capacity, the 55th electric capacity, the 56th electricity Appearance, the 57th electric capacity, the 58th electric capacity, the 24th inductance, the 25th inductance, the 26th inductance, the 27th Inductance, the 28th inductance, the 29th inductance, the 30th inductance, the 31st inductance, the 32nd inductance, the 33rd Inductance, the 34th inductance, the 35th inductance, second switch and the second light emitting diode, described the second radio frequency chip 7th pin is grounded by described second switch, the 10th pin of described the second radio frequency chip, the 12nd pin, the 18th pin, the 37th pin, One end of the 47th described electric capacity, one end of the 48th described electric capacity, one end, the institute of the 55th described electric capacity One end connection of one end of the 57th electric capacity stated and the 35th described inductance, described the 47th electric capacity it is another End, the other end, the other end and the 57th described electric capacity of the 55th described electric capacity of the 48th described electric capacity The other end be grounded, the other end of described the 35th inductance accesses 3.3V voltages, the of described the second radio frequency chip 13 pin are connected with one end of the 24th described inductance, the 14th pin and the described the 25th of described the second radio frequency chip One end connection of inductance, the 15th pin of the second described radio frequency chip is connected with one end of the 26th described inductance, described The 16th pin of the second radio frequency chip be connected with one end of the 27th described inductance, the 17th of described the second radio frequency chip the Pin is connected with one end of the 28th described inductance, the other end of described the 24th inductance, the 25th described electricity The other end of sense, the other end of the 26th described inductance, the other end and described second of the 27th described inductance The other end output digital audio and video signals of 18 inductance, the 19th pin of described the second radio frequency chip and the 29th described electricity One end connection of sense, the other end of the 29th described inductance is connected with the negative electrode of the second described light emitting diode, described The anode of the second light emitting diode be connected with one end of the 20th described resistance, another termination of described the 20th resistance Enter 3.3V voltages, it is the 20th pin of described the second radio frequency chip, the 23rd pin, the 26th pin, the 27th pin, the 28th pin, the 31st pin, described One end of the 49th electric capacity, one end of the 52nd described electric capacity, one end of the 54th described electric capacity, described One end connection of one end of the 53rd electric capacity and the 30th described inductance, the other end of the 30th described inductance is accessed 3.3V voltages, the other end, the other end, the described the 53rd of the 52nd described electric capacity of described the 49th electric capacity The other end of the other end of electric capacity and the 54th described electric capacity is grounded, the 21st pin, the institute of described the second radio frequency chip One end connection of one end of the 50th electric capacity stated and the second described crystal oscillator, the 22nd pin, the institute of described the second radio frequency chip One end connection of the other end of the second crystal oscillator stated and the 51st described electric capacity, the other end of described the 50th electric capacity and The other end of the 51st described electric capacity is grounded, and the 30th pin of the second described radio frequency chip is electric by the described the 19th Resistance ground connection, the 33rd pin of the second described radio frequency chip passes through described the 31st inductance and the first described audio decoder The connection of the 9th pin, the 32nd pin of described the second radio frequency chip is by described the 32nd inductance and the first described audio The 8th pin connection of decoder, the 36th pin of the second described radio frequency chip is connected with one end of the 33rd described inductance, institute 38th pin of the second radio frequency chip stated is connected with one end of the 34th described inductance, and the of described the second radio frequency chip 39 pin are by the 58th described capacity earth, and the 40th pin of the second described radio frequency chip is electric by the described the 56th Hold ground connection, the other end, the other end of the 33rd described inductance, the second described radio frequency core of described the 34th inductance 24th pin of piece and the 25th pin incoming radio frequency signal of the second described radio frequency chip.
8. a kind of wireless microphone according to claim 7, it is characterised in that described second source management module includes Second voltage stabilizing chip and the 3rd voltage stabilizing chip of model TLV700, the 59th electric capacity, the 60th electric capacity, the 61st electricity Hold, the 62nd electric capacity and the 63rd electric capacity, the 1st pin, the 3rd pin, the described the 61st of described the second voltage stabilizing chip 5V power supplys are accessed in one end of electric capacity, one end of the 63rd described electric capacity, and the 2nd pin of the second described voltage stabilizing chip is grounded, The 5th pin output 3.3V voltages of the second described voltage stabilizing chip, it is the 1st pin of described the 3rd voltage stabilizing chip, the 3rd pin, described 3.3V voltages are accessed in one end of one end of 59th electric capacity and the 60th described electric capacity, and the of described the 3rd voltage stabilizing chip 2 pin are grounded, the other end of described the 59th electric capacity, the other end of the 60th described electric capacity, the 61st described electricity The other end of the other end of appearance, one end of the 62nd described electric capacity and the 63rd described electric capacity is grounded, described The 5th pin connection of the other end of the 62nd electric capacity and the 3rd described voltage stabilizing chip and output 1.8V voltages.
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US6671503B1 (en) * 1999-06-03 2003-12-30 Kabushiki Kaisha Audio-Technica Wireless microphone system
CN101127932A (en) * 2007-09-17 2008-02-20 深圳市力同亚太科技有限公司 An integrated talk back module and talk back system based on this module
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JPH10224885A (en) * 1997-02-07 1998-08-21 Asahi Giken Kk Voice guidance system
KR20000038732A (en) * 1998-12-09 2000-07-05 손병오 Wireless microphone system capable of being used in connection with wired microphone system
US6671503B1 (en) * 1999-06-03 2003-12-30 Kabushiki Kaisha Audio-Technica Wireless microphone system
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