CN202261245U - Integrated audio transmitter, portable equipment with integrated audio transmitter, integrated audio receiver, portable equipment with integrated audio receiver and audio communication system - Google Patents
Integrated audio transmitter, portable equipment with integrated audio transmitter, integrated audio receiver, portable equipment with integrated audio receiver and audio communication system Download PDFInfo
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- CN202261245U CN202261245U CN2011203116779U CN201120311677U CN202261245U CN 202261245 U CN202261245 U CN 202261245U CN 2011203116779 U CN2011203116779 U CN 2011203116779U CN 201120311677 U CN201120311677 U CN 201120311677U CN 202261245 U CN202261245 U CN 202261245U
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Abstract
The utility model relates to an integrated audio transmitter, portable equipment with the integrated audio transmitter, an integrated audio receiver, portable equipment with the integrated audio receiver and an audio communication system. The integrated audio transmitter comprises an analogue-to-digital converter, a digital compressor and a first phase-locked loop, wherein the analogue-to-digital converter is used for converting an analogue audio signal into a digital audio signal; the digital compressor is connected with the analogue-to-digital converter, and is used for compressing the dynamic range of the digital audio signal; the first phase-locked loop is connected with the digital compressor, and is used for generating a radio frequency signal according to a channel selection signal, the compressed digital audio signal and a reference clock; and the analogue-to-digital converter, the digital compressor, a local oscillator and the first phase-locked loop are integrated in an integrated circuit. By the utility model, the cost of each of an audio transmitter and an audio receiver can be decreased, and the distortion of an audio signal can be reduced.
Description
Technical field
The utility model relates to microelectronic, relates in particular to a kind of integrated audio transmitter and portable equipment, integrated audio receiver and portable equipment, audio communication system.
Background technology
RF transceiver is widely used in various fields, for example: WLAN, RF tag, global positioning system, wireless broadcast system, mobile phone, cordless telephone etc.Wherein, adopted audio transceiver in the wireless broadcast system.Shown in Figure 1A; Structural representation for a kind of audio transmitter in the prior art; Comprise first amplifier 11, analog modulator 12, power amplifier 13 and transmitting antenna 14, simulated audio signal amplifies through first amplifier 11, and the analogue audio frequency voltage signal after the amplification is converted into the simulation modulated signal through analog modulator 12; This simulation modulated signal is launched through transmitting antenna 14 after power amplifier 13 amplifies.Shown in Figure 1B; Structural representation for a kind of voice receiver in the prior art; Can comprise reception antenna 15, second amplifier 16, orthogonal mixer 19, filter 20, analog demodulator 17 and player 18, reception antenna 15 receives analog radio-frequency signals, and second amplifier 16 amplifies these analog radio-frequency signals; Analog radio-frequency signal after orthogonal mixer 19 will amplify is down-converted to fixing intermediate frequency; Signal after 20 pairs of frequency conversions of filter carries out filtering and obtains intermediate-freuqncy signal, and 17 pairs of intermediate-freuqncy signals of analog demodulator are carried out demodulation and obtained simulated audio signal, and player 18 is converted into sound with the simulated audio signal after the demodulation.
In the communication system that Figure 1A and Figure 1B formed; The signal to noise ratio of system is subject to the local oscillator part of transmitter and receiver; And it is lower as the signal to noise ratio of the voltage controlled oscillator of the local oscillator of transmitter and receiver part; Generally below 70dB, the signal to noise ratio that has limited such emitting-receiving system continues to improve.In order to improve the signal to noise ratio of the communication system that Figure 1A and Figure 1B form, in the communication system that Figure 1A and Figure 1B formed, adopted the audio frequency companding technology.The audio frequency companding technology is transmission again after transmitting terminal compresses the dynamic range of the audio signal of being transmitted effectively, the dynamic range of the audio signal that receives is expanded at receiving terminal again; At transmitting terminal, compressing audio signal not only, and compress extra noise; And, in the extended audio signal, reduce extra noise at receiving terminal; Adopt this technology can produce speech more clearly, make in noisy environment, still can keep unimpeded contact, have very much practical value.
Shown in Fig. 2 A; Structural representation for another kind of audio transmitter in the prior art; On the basis of structural representation shown in Figure 1A, increased analog compressor 21; Be connected between first amplifier 12 and the analog modulator 13, the simulated audio signal after 21 pairs of amplifications of analog compressor compresses.Shown in Fig. 2 B; Structural representation for another kind of voice receiver in the prior art; On the basis of the intention of structure shown in Figure 1B, increased simulative expander 22, be connected between analog demodulator 17 and the player 18, the simulated audio signal after 22 pairs of demodulation of simulative expander is expanded.Wherein, because analog compressor 21 is amplified the ability of weak signal greater than the ability of amplifying strong signal,, reduced signal to noise ratio requirement to communication channel so analog compressor 21 has been compressed the dynamic range of signal.Simulative expander 22 is opposite with the effect of analog compressor 21, and simulative expander 22 will be compressed signal and return to former dynamic range.
But; The frequency range of the audio signal that the audio communication system that Fig. 2 A and Fig. 2 B are formed is handled is lower; The capacitor and inductor that causes adopting in this framework is bigger, so can only adopt discrete component to realize this framework, makes that like this cost of audio transmitter and receiver is higher.Simultaneously, because compressor reducer and the used discrete component of expander can not mate fully, can cause the audio signal distortion bigger.
The utility model content
The utility model provides a kind of integrated audio transmitter and portable equipment, integrated audio receiver and portable equipment, audio communication system, in order to realizing reducing the cost of audio transmitter and receiver, and the distortion of minimizing audio signal.
The utility model provides a kind of integrated audio transmitter, comprising:
Analog-digital converter is used for converting simulated audio signal into digital audio and video signals;
Digital compressor is connected with said analog-digital converter, is used to compress the dynamic range of said digital audio and video signals;
First phase-locked loop is connected with said digital compressor, is used for generating radiofrequency signal according to digital audio and video signals and reference clock after channel selecting signal, the compression;
Wherein, said analog-digital converter, said digital compressor, said local oscillator and said first phase-locked loop are integrated in the integrated circuit.
The utility model also provides a kind of portable equipment with integrated audio transmitter, comprising:
The first channel option interface;
Audio input interface;
The integrated audio transmitter;
The radiofrequency signal output interface;
Wherein, said integrated audio transmitter comprises:
Analog-digital converter is used for converting simulated audio signal into digital audio and video signals;
Digital compressor is connected with said analog-digital converter, is used to compress the dynamic range of said digital audio and video signals;
First phase-locked loop is connected with said digital compressor, is used for generating radiofrequency signal according to digital audio and video signals and reference clock after channel selecting signal, the compression;
Wherein, said analog-digital converter, said digital compressor, said local oscillator and said first phase-locked loop are integrated in the integrated circuit.
The utility model also provides a kind of integrated audio receiver, comprising:
The local oscillated signal generating unit is used for generating a plurality of local oscillated signals according to channel selecting signal and reference clock, and the frequency of said a plurality of local oscillated signals is identical, phase place is different;
Frequency mixer is connected with said local oscillated signal generating unit, is used for received RF signal, according to said a plurality of local oscillated signals, said FM signal is down-converted to the Low Medium Frequency signal, and said Low Medium Frequency signal comprises I road signal and Q road signal;
Analog-digital converter is connected with said frequency mixer, and being used for said I road signal and Q road conversion of signals is digital Low Medium Frequency signal;
Digital demodulator is connected with said orthogonal simulation digital quantizer, is used for said digital Low Medium Frequency signal is demodulated into digital audio and video signals;
Digital expander is connected with said digital demodulator, is used to expand the dynamic range of said digital audio and video signals;
Digital analog converter is connected with said digital expander, is used for converting the digital audio and video signals after the expansion into simulated audio signal;
Wherein, said local oscillated signal generating unit, said frequency mixer, said analog-digital converter, said digital demodulator, said digital expander, said digital analog converter are integrated on the integrated circuit.
The utility model also provides a kind of portable equipment with integrated audio receiver, comprising:
The second channel option interface;
The integrated audio receiver;
The audio signal output interface;
Wherein, said integrated audio receiver comprises:
The local oscillated signal generating unit is used for generating a plurality of local oscillated signals according to channel selecting signal and reference clock, and the frequency of said a plurality of local oscillated signals is identical, phase place is different;
Frequency mixer is connected with said local oscillated signal generating unit, is used for received RF signal, according to said a plurality of local oscillated signals, said FM signal is down-converted to the Low Medium Frequency signal, and said Low Medium Frequency signal comprises I road signal and Q road signal;
Analog-digital converter is connected with said frequency mixer, and being used for said I road signal and Q road conversion of signals is digital Low Medium Frequency signal;
Digital demodulator is connected with said orthogonal simulation digital quantizer, is used for said digital Low Medium Frequency signal is demodulated into digital audio and video signals;
Digital expander is connected with said digital demodulator, is used to expand the dynamic range of said digital audio and video signals;
Digital analog converter is connected with said digital expander, is used for converting the digital audio and video signals after the expansion into simulated audio signal;
Wherein, said local oscillated signal generating unit, said frequency mixer, said analog-digital converter, said digital demodulator, said digital expander, said digital analog converter are integrated on the integrated circuit.
The utility model also provides a kind of audio communication system, comprises integrated audio transmitter and integrated audio receiver, and said integrated audio transmitter comprises:
Analog-digital converter is used for converting simulated audio signal into digital audio and video signals;
Digital compressor is connected with said analog-digital converter, is used to compress the dynamic range of said digital audio and video signals;
First phase-locked loop is connected with said digital compressor, is used for generating radiofrequency signal according to digital audio and video signals and reference clock after channel selecting signal, the compression;
Wherein, said analog-digital converter, said digital compressor, said local oscillator and said first phase-locked loop are integrated in the integrated circuit;
Said integrated audio transmitter comprises:
The local oscillated signal generating unit is used for generating a plurality of local oscillated signals according to channel selecting signal and reference clock, and the frequency of said a plurality of local oscillated signals is identical, phase place is different;
Frequency mixer is connected with said local oscillated signal generating unit, is used for received RF signal, according to said a plurality of local oscillated signals, said FM signal is down-converted to the Low Medium Frequency signal, and said Low Medium Frequency signal comprises I road signal and Q road signal;
Analog-digital converter is connected with said frequency mixer, and being used for said I road signal and Q road conversion of signals is digital Low Medium Frequency signal;
Digital demodulator is connected with said orthogonal simulation digital quantizer, is used for said digital Low Medium Frequency signal is demodulated into digital audio and video signals;
Digital expander is connected with said digital demodulator, is used to expand the dynamic range of said digital audio and video signals;
Digital analog converter is connected with said digital expander, is used for converting the digital audio and video signals after the expansion into simulated audio signal;
Wherein, said local oscillated signal generating unit, said frequency mixer, said analog-digital converter, said digital demodulator, said digital expander, said digital analog converter are integrated on the integrated circuit.
In the utility model,, reduced the cost of audio transmitter and receiver owing to adopted the digitlization integrated circuit to realize audio transmitter and receiver; Simultaneously; Digital compressor and digital expander all adopt digital processing technology, match, and the audio signal distortion is little.
Description of drawings
Figure 1A is the structural representation of a kind of audio transmitter in the prior art;
Figure 1B is the structural representation of a kind of voice receiver in the prior art;
Fig. 2 A is the structural representation of another kind of audio transmitter in the prior art;
Fig. 2 B is the structural representation of another kind of voice receiver in the prior art;
Fig. 3 is the structural representation of the utility model audio communication system embodiment;
Fig. 4 is the structural representation of first phase-locked loop among the utility model integrated audio transmitter embodiment;
Fig. 5 is the structural representation of phase-locked loop in the prior art;
Fig. 6 is the structural representation of local oscillated signal generating unit among the utility model integrated audio receiver embodiment;
Fig. 7 is the structural representation that the utlity model has the portable equipment embodiment of integrated audio transmitter;
Fig. 8 is the structural representation that the utlity model has the portable equipment embodiment of integrated audio receiver.
Embodiment
Below in conjunction with Figure of description and embodiment the utility model is done further to describe.
As shown in Figure 3, be the structural representation of the utility model audio communication system embodiment, can comprise integrated audio transmitter 31 and integrated audio receiver 32, integrated audio transmitter 31 is connected with 32 communications of integrated audio receiver.
Referring to Fig. 3, integrated audio transmitter 31 can comprise analog-digital converter 311, digital compressor 312, first phase-locked loop 313 again.Digital compressor 312 is connected with analog-digital converter 311, and first phase-locked loop 313 is connected with digital compressor 312.
Wherein, analog-digital converter 311, digital compressor 312 and first phase-locked loop 313 are integrated in the integrated circuit.Preferably, this integrated circuit can adopt the manufacturing of CMOS technology.
Wherein, analog-digital converter 311 is used for converting simulated audio signal into digital audio and video signals; Digital compressor 312 is used for the dynamic range of compression digital audio frequency signal; First phase-locked loop 313 is used for generating radiofrequency signal according to digital audio and video signals and reference clock after channel selecting signal, the compression.Particularly, this reference clock is produced by the outer crystal oscillator of sheet, and channel selecting signal is provided by the outer MCU of sheet.
Further; As shown in Figure 4; Be the structural representation of first phase-locked loop among the utility model integrated audio transmitter embodiment, first phase-locked loop 313 can comprise the first frequency division controller 3131, first programmable frequency divider 3132, first phase discriminator 3133, first filter 3134 and first voltage controlled oscillator 3135.The first frequency division controller 3131 is connected with digital compressor 312; First programmable frequency divider 3132 is connected with the first frequency division controller 3131; First phase discriminator 3133 is connected with first programmable frequency divider 3132; First filter 3134 is connected with first phase discriminator 3133, and first voltage controlled oscillator 3135 is connected with first programmable frequency divider 3132 with first filter 3134.
In the present embodiment; The hypothetical reference clock is x (t), and first voltage controlled oscillator 3135 is output as y (t), and first programmable frequency divider 3132 is output as z (t); The first frequency division controller 3131 is used for generating the frequency division control word according to the digital audio and video signals after channel selecting signal and the compression; First programmable frequency divider 3132 is used for according to the frequency division control word, the signal of first voltage controlled oscillator 3135 output is carried out fractional frequency signal carry out frequency division, signal z (t) input first phase discriminator 3133 behind the frequency division; Reference clock x (t) input first phase discriminator 3133, the first phase discriminators 3133 are used to obtain the phase difference φ of two input signal x (t) and z (t); First filter 3134 is used for the output signal of first phase discriminator 3133 is carried out LPF, thereby suppresses the HFS in the output signal of first phase discriminator 3133, only allows DC component and audio signal to control the frequency of first voltage controlled oscillator 3135; First voltage controlled oscillator 3135 is used for filtered signal is converted into frequency signal.
In the present embodiment, the first frequency division controller 3131 can realize that adder is earlier to the digital audio and video signals summation after channel selecting signal and the compression through adder and sigma-delta modulator, and the signal input sigma-delta modulator after the summation obtains the frequency division control word.
As shown in Figure 5; Structural representation for phase-locked loop in the prior art; Be that with the difference of sketch map shown in Figure 4 in the prior art, this phase-locked loop does not comprise the first frequency division controller 3131; Channel selecting signal is applied directly on first programmable frequency divider 3132, controls the branch frequency of first programmable frequency divider 3132; Digital audio and video signals after the compression is applied directly on first voltage controlled oscillator 3135, controls the vibration of first voltage controlled oscillator 3135.In phase-locked loop shown in Figure 5; For the digital audio and video signals after guaranteeing to compress is not muted by phase-locked loop after being applied to first voltage controlled oscillator 3135; The bandwidth of first filter 3134 must be far below the low-limit frequency of the digital audio and video signals after the compression, and the actual bandwidth of first filter 3134 generally is designed to several hertz.When the centre frequency of first voltage controlled oscillator 3135 because after reason such as be interfered drifted about, resume speed was slow, and in recovery process, the variation of centre frequency can be received the machine demodulation and come out, thereby shows as the back drop that can hear at receiving terminal.And in sketch map shown in Figure 4, the digital audio and video signals after the compression gets into phase-locked loop through the first frequency division controller 3131, and the bandwidth of first filter 3134 can be higher than the bandwidth of digital audio and video signals; After the centre frequency of first voltage controlled oscillator 3135 is drifted about; Resume speed is fast, and in recovery process, comes out even the variation of centre frequency is received the machine demodulation; The frequency of the interference signal that demodulation is come out is higher than the bandwidth of digital audio and video signals, and people's ear also can't be heard.
Again referring to sketch map shown in Figure 3; In the present embodiment; Integrated audio transmitter 31 can also comprise variable gain amplifier 310 and preemphasis circuit 314; Variable gain amplifier 310 is connected with analog-digital converter 311, and preemphasis circuit 314 is connected between analog-digital converter 311 and the digital compressor 312.Alternatively, preemphasis circuit 314 can also be connected between the digital compressor 312 and first phase-locked loop 313.
Again referring to sketch map shown in Figure 3; In the present embodiment, integrated audio receiver 32 can comprise local oscillated signal generating unit 321, frequency mixer 322, analog-digital converter 323, digital demodulator 324, digital expander 325, digital analog converter 326.Frequency mixer 322 is connected with local oscillated signal generating unit 321; Orthogonal simulation digital quantizer 323 is connected with frequency mixer 322; Digital demodulator 324 is connected with analog-digital converter 323; Digital expander 325 is connected with digital demodulator 324, and digital analog converter 326 is connected with digital expander 325.
Wherein, local oscillated signal generating unit 321, frequency mixer 322, analog-digital converter 323, digital demodulator 324, digital expander 325, digital analog converter 326 are integrated on the integrated circuit.Preferably, this integrated circuit can adopt the manufacturing of CMOS technology.
Particularly; Local oscillated signal generating unit 321 is used for according to channel selecting signal and reference clock; Generate a plurality of local oscillated signals, the frequency of these local oscillated signals is identical, phase place is different, preferably; Local oscillated signal generating unit 321 generates two-way local oscillated signal, 90 ° of the phase phasic differences of this two-way local oscillated signal; Frequency mixer 322 is used for received RF signal, according to a plurality of local oscillated signals, radiofrequency signal is down-converted to the Low Medium Frequency signal, and the Low Medium Frequency signal comprises I road signal and Q road signal; It is digital Low Medium Frequency signal that orthogonal simulation digital quantizer 323 is used for I road signal and Q road conversion of signals; Digital demodulator 324 is used for digital Low Medium Frequency signal is demodulated into digital audio and video signals; Digital expander 325 is used for the dynamic range of expanding digital audio signal; Digital analog converter 326 is used for converting the digital audio and video signals after the expansion into simulated audio signal.
Further; In the present embodiment; As shown in Figure 6; Be the structural representation of local oscillated signal generating unit among the utility model integrated audio receiver embodiment, local oscillated signal generating unit 321 can comprise second phase-locked loop 3211, phase shift signalling generator 3212 and automatic frequency control unit 3213.Phase shift signalling generator 3212 is connected with second phase-locked loop 3211, and automatic frequency control unit 3213 is connected with digital demodulator 324.
Wherein, second phase-locked loop 3211 is used for according to channel selecting signal, automatic frequency control signal and reference clock, generates a local oscillated signal, and wherein, channel selecting signal is provided by outside MCU, and reference clock is provided by external crystal oscillator; Phase shift signalling generator 3212 is used for a local oscillated signal according to the generation of second phase-locked loop; Generate a plurality of local oscillated signals; Preferably, these a plurality of local oscillated signals comprise two local oscillated signals, i.e. first local oscillated signal and second local oscillated signal; The phase difference of these two local oscillated signals is 90 °, and promptly these two local oscillated signals are the quadrature local oscillated signal; Automatic frequency control unit 3213 is used for the digital audio and video signals according to demodulation, generates automatic frequency control signal, and automatic frequency control signal is sent to second phase-locked loop 3211.
Further, again referring to Fig. 6, second phase-locked loop 3211 can comprise the second frequency division controller 32111, second programmable frequency divider 32112, second phase discriminator 32113, second filter 32114 and second voltage controlled oscillator 32115.The second frequency division controller 32111 is connected with automatic frequency control unit 3213; Second programmable frequency divider 32112 is connected with the second frequency division controller 32111; Second phase discriminator 32113 is connected with second programmable frequency divider 32112; Second filter 32114 is connected with second phase discriminator 32113, and second voltage controlled oscillator 32115 is connected with second programmable frequency divider 32112 with second filter 32114, phase shift signalling generator 3212.
Wherein, the second frequency division controller 32111 is used for according to channel selecting signal and automatic frequency control signal, generates the frequency division control word; Second programmable frequency divider 32112 is used for according to the frequency division control word, and the signal that second voltage controlled oscillator 32115 is exported carries out frequency division; Second phase discriminator 32113 is identical with the operation principle of first phase discriminator 3133; Second filter 32114 is identical with the operation principle of first filter 3134; Second voltage controlled oscillator 32115 is identical with the operation principle of first voltage controlled oscillator 3135.
In the present embodiment, the second frequency division controller 32111 can realize that adder is earlier to channel selecting signal and automatic frequency control signal summation through adder and sigma-delta modulator, and the signal input sigma-delta modulator after the summation obtains the frequency division control word.
Referring to sketch map shown in Figure 3, in the present embodiment, integrated audio receiver 32 can also comprise deaccentuator 327 again.Deaccentuator 327 is connected between digital expander 325 and the digital analog converter 326.When preemphasis circuit 314 was connected between the digital compressor 312 and first phase-locked loop 313, deaccentuator 327 was connected between digital demodulator 324 and the digital expander 325.
Referring to sketch map shown in Figure 3, integrated audio receiver 32 can also comprise low noise amplifier 328 again, is connected with frequency mixer 322.
In addition, in an embodiment, the quantity of the discrete component that integrated audio transmitter and integrated audio receiver are required is less than or equal to 50 respectively.Area after the encapsulation of integrated audio transmitter and receiver is less than or equal to 4mm * 4mm respectively.
In the present embodiment, owing to adopted the digitlization integrated circuit to realize audio transmitter and receiver, reduced the cost of audio transmitter and receiver; Simultaneously; Digital compressor and digital expander all adopt digital processing technology, match, and the audio signal distortion is little.
As shown in Figure 7, be the structural representation of the portable equipment embodiment that the utlity model has the integrated audio transmitter, can comprise the first channel option interface 61, audio input interface 62, integrated audio transmitter 31, radiofrequency signal output interface 63.The first channel option interface 61 is connected with integrated audio transmitter 31 with audio input interface 62, and integrated audio transmitter 31 is connected with radiofrequency signal output interface 63.
Wherein, integrated audio transmitter 31 can comprise arbitrary module among the aforementioned integrated audio transmitter embodiment, repeats no more at this.
In the present embodiment, the area that lumps together of the first channel option interface 61, audio input interface 62, integrated audio transmitter 31 and radiofrequency signal output interface 63 is less than or equal to 20mm * 40mm.
Referring to Fig. 7, this portable equipment can also comprise transmitting antenna 14 and sound transducer 65 again, and transmitting antenna 14 is connected with radiofrequency signal output interface 63, and sound transducer 65 is connected with audio input interface 62.Sound transducer 65 is converted into audio signal with acoustic information, sends to integrated audio transmitter 31 through audio input interface.Sound transducer 65 specifically can be converted into acoustic information the equipment of audio signal for microphone or other.Transmitting antenna 14 is gone out emission of radio frequency signals.
As shown in Figure 8, the structural representation for the portable equipment embodiment that the utlity model has the integrated audio receiver can comprise second channel option interface 71, integrated audio receiver 32, audio signal output interface 73.Second channel option interface 71 is connected with integrated audio receiver 32, and audio signal output interface 73 is connected with integrated audio receiver 32.
Wherein, integrated audio receiver 32 can comprise arbitrary module among the aforementioned integrated audio receiver embodiment, repeats no more at this.
Again referring to Fig. 8; Present embodiment can also comprise reception antenna 15 and audio player 75; Reception antenna 15 is connected with integrated audio receiver 32; Audio player 75 is connected with audio signal output interface 73, audio player 75 specifically can for audio amplifier, earphone etc. can back sound information equipment.
What should explain at last is: above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although the utility model is specified with reference to preferred embodiment; Those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement the technical scheme of the utility model, and not break away from the spirit and the scope of the utility model technical scheme.
Claims (12)
1. an integrated audio transmitter is characterized in that, comprising:
Analog-digital converter is used for converting simulated audio signal into digital audio and video signals;
Digital compressor is connected with said analog-digital converter, is used to compress the dynamic range of said digital audio and video signals;
First phase-locked loop is connected with said digital compressor, is used for generating radiofrequency signal according to digital audio and video signals and reference clock after channel selecting signal, the compression;
Wherein, said analog-digital converter, said digital compressor, said local oscillator and said first phase-locked loop are integrated in the integrated circuit.
2. integrated audio transmitter according to claim 1 is characterized in that, said first phase-locked loop comprises:
The first frequency division controller is connected with said digital compressor, is used for according to the digital audio and video signals after said channel selecting signal and the said compression, generates the frequency division control word;
First programmable frequency divider is connected with the said first frequency division controller;
First phase discriminator is connected with said first programmable frequency divider;
First filter is connected with said first phase discriminator;
First voltage controlled oscillator is connected with said first programmable frequency divider with said first filter;
Said first programmable frequency divider is used for according to said frequency division control word, and the signal that said first voltage controlled oscillator is exported carries out frequency division.
3. integrated audio transmitter according to claim 1 is characterized in that, the integrated circuit of said integrated circuit for adopting CMOS technology to make.
4. the portable equipment with integrated audio transmitter is characterized in that, comprising:
The first channel option interface;
Audio input interface;
The integrated audio transmitter;
The radiofrequency signal output interface;
Wherein, said integrated audio transmitter comprises the arbitrary described integrated audio transmitter of claim 1-3.
5. an integrated audio receiver is characterized in that, comprising:
The local oscillated signal generating unit is used for generating a plurality of local oscillated signals according to channel selecting signal and reference clock, and the frequency of said a plurality of local oscillated signals is identical, phase place is different;
Frequency mixer is connected with said local oscillated signal generating unit, is used for received RF signal, according to said a plurality of local oscillated signals, said FM signal is down-converted to the Low Medium Frequency signal, and said Low Medium Frequency signal comprises I road signal and Q road signal;
Analog-digital converter is connected with said frequency mixer, and being used for said I road signal and Q road conversion of signals is digital Low Medium Frequency signal;
Digital demodulator is connected with said orthogonal simulation digital quantizer, is used for said digital Low Medium Frequency signal is demodulated into digital audio and video signals;
Digital expander is connected with said digital demodulator, is used to expand the dynamic range of said digital audio and video signals;
Digital analog converter is connected with said digital expander, is used for converting the digital audio and video signals after the expansion into simulated audio signal;
Wherein, said local oscillated signal generating unit, said frequency mixer, said analog-digital converter, said digital demodulator, said digital expander, said digital analog converter are integrated on the integrated circuit.
6. integrated audio receiver according to claim 5 is characterized in that, the integrated circuit of said integrated circuit for adopting CMOS technology to make.
7. integrated audio receiver according to claim 5 is characterized in that, said local oscillated signal generating unit comprises:
Second phase-locked loop is used for according to channel selecting signal, automatic frequency control signal and reference clock, generates a local oscillated signal;
The phase shift signalling generator is connected with said second phase-locked loop, is used for generating said a plurality of local oscillated signal according to a said local oscillated signal;
The automatic frequency control unit is connected with said digital demodulator, is used for generating said automatic frequency control signal according to said digital audio and video signals, and said automatic frequency control signal is sent to said second phase-locked loop.
8. integrated audio receiver according to claim 7 is characterized in that, said second phase-locked loop comprises:
The second frequency division controller is connected with said automatic frequency control unit, is used for according to said channel selecting signal and said automatic frequency control signal, generates the frequency division control word;
Second programmable frequency divider is connected with the said second frequency division controller;
Second phase discriminator is connected with said second programmable frequency divider;
Second filter is connected with said second phase discriminator;
Second voltage controlled oscillator is connected with said second filter, said phase shift signalling generator and said second programmable frequency divider;
Said second programmable frequency divider is used for according to said frequency division control word, and the signal that said second voltage controlled oscillator is exported carries out frequency division.
9. the portable equipment with integrated audio receiver is characterized in that, comprising:
The second channel option interface;
The integrated audio receiver;
The audio signal output interface;
Wherein, said integrated audio receiver comprises the arbitrary described integrated audio receiver of claim 5-8.
10. audio communication system; Comprise integrated audio transmitter and integrated audio receiver; It is characterized in that; Said integrated audio transmitter comprises the arbitrary described integrated audio transmitter of claim 1-3, and said integrated audio receiver comprises the arbitrary described integrated audio receiver of claim 5-8.
11. audio communication system according to claim 10 is characterized in that, the quantity of the discrete component that said integrated audio transmitter and said integrated audio receiver are required is less than or equal to 50 respectively.
12. audio communication system according to claim 10 is characterized in that, the area after said integrated audio transmitter and the encapsulation of said integrated audio receiver is less than or equal to 4mm * 4mm respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203116779U CN202261245U (en) | 2011-08-25 | 2011-08-25 | Integrated audio transmitter, portable equipment with integrated audio transmitter, integrated audio receiver, portable equipment with integrated audio receiver and audio communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203116779U CN202261245U (en) | 2011-08-25 | 2011-08-25 | Integrated audio transmitter, portable equipment with integrated audio transmitter, integrated audio receiver, portable equipment with integrated audio receiver and audio communication system |
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| CN202261245U true CN202261245U (en) | 2012-05-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780506A (en) * | 2012-08-20 | 2012-11-14 | 北京昆腾微电子有限公司 | Audio transmission chip and portable device with same |
| CN102843158A (en) * | 2012-08-20 | 2012-12-26 | 北京昆腾微电子有限公司 | Audio receiving chip and portable device comprising the same |
| CN106601267A (en) * | 2016-11-30 | 2017-04-26 | 武汉船舶通信研究所 | Ultra-short wave FM modulation-based speech enhancement method |
-
2011
- 2011-08-25 CN CN2011203116779U patent/CN202261245U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102780506A (en) * | 2012-08-20 | 2012-11-14 | 北京昆腾微电子有限公司 | Audio transmission chip and portable device with same |
| CN102843158A (en) * | 2012-08-20 | 2012-12-26 | 北京昆腾微电子有限公司 | Audio receiving chip and portable device comprising the same |
| CN106601267A (en) * | 2016-11-30 | 2017-04-26 | 武汉船舶通信研究所 | Ultra-short wave FM modulation-based speech enhancement method |
| CN106601267B (en) * | 2016-11-30 | 2019-12-06 | 武汉船舶通信研究所 | Voice enhancement method based on ultrashort wave FM modulation |
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Owner name: KUNTENG MICROELECTRONIC CO., LTD. Free format text: FORMER NAME: BEIJING KUNTENG MICRO-ELECTRONICS INC. Owner name: BEIJING KUNTENG MICRO-ELECTRONICS INC. Free format text: FORMER NAME: KT MICRO, INC. |
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Address after: 100097 Beijing city Haidian District landianchang Road No. 2 Jin Yuan Times Business Center No. 2 building B, 8 A, B Patentee after: Beijing Kunteng electronic Limited by Share Ltd. Address before: 100097 Beijing city Haidian District landianchang Road No. 2 Jin Yuan Times Business Center No. 2 building B, 8 A, B Patentee before: KT MICRO Inc. (BEIJING) |
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Address after: 100195 Beijing, Yuquan, No. 23 Haidian District Road, building No. 4 Patentee after: KT MICRO, Inc. Address before: 100097 Beijing city Haidian District landianchang Road No. 2 Jin Yuan Times Business Center No. 2 building B, 8 A, B Patentee before: Beijing Kunteng electronic Limited by Share Ltd. |
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