CN109067400A - A kind of real-time audio digiverter - Google Patents
A kind of real-time audio digiverter Download PDFInfo
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- CN109067400A CN109067400A CN201810839042.2A CN201810839042A CN109067400A CN 109067400 A CN109067400 A CN 109067400A CN 201810839042 A CN201810839042 A CN 201810839042A CN 109067400 A CN109067400 A CN 109067400A
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- 230000005236 sound signal Effects 0.000 claims abstract description 21
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- 239000013307 optical fiber Substances 0.000 claims abstract description 17
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- 238000005859 coupling reaction Methods 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 82
- 238000004088 simulation Methods 0.000 claims description 6
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- 230000003111 delayed effect Effects 0.000 description 2
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
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Abstract
The present invention relates to a kind of real-time audio digiverters, belong to digital audio revolving die and intend Audiotechnica field.Including digital audio optical fiber input interface, digital audio coaxial cable input interface, digital audio and video signals isolation coupling circuit, digital signal samples circuit, D/A conversion circuit, analog audio signal amplifying circuit, analogue audio frequency L channel coaxial cable output interface, analogue audio frequency right channel coaxial cable output interface.The digital audio optical fiber input interface sum number word tone high frequency coaxial cable input interface is connected with digital audio and video signals isolation coupling circuit, digital audio and video signals isolation coupling circuit is connected with digital signal samples circuit, digital signal samples circuit is connected with D/A conversion circuit, D/A conversion circuit is connected with analog audio signal amplifying circuit, and analog audio signal amplifying circuit is connected with analogue audio frequency left and right acoustic channels coaxial cable output interface.
Description
Technical field
The present invention relates to a kind of real-time audio digiverters, belong to digital audio revolving die and intend Audiotechnica field.
Background technique
With the development of broadcast science and technology, programme signal source is increasingly digitized with broadcasting equipment, derived digital signal and number
Equipment is all being continuously increased.But in broadcast transmitting station, few signals and equipment are all digital or simulation states,
Such as one programs have 3 signal sources, optical fiber, satellite and microwave, it is possible to optical fiber and satellite are digital signals, and microwave is
Analog signal, alternatively, signal source is digital entirely, and transmitter is simulation.
In addition, more and more players and display is only equipped with digital audio optical fiber interface or digital audio is coaxial
Interface, such as PS3, PS4, and most of high definition set top box, blue-ray DVD, and most of old money sound equipment only has analogue audio frequency
R/L interface, the player of digital audio output interface cannot play on the sound equipment of old money.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of real-time audio digiverters, for that will count in real time
Word tone frequency is converted to analogue audio frequency, is delayed small, and real-time is high, and strong antijamming capability, entire circuit is small in size, and light weight has
The signal modulation ability and signal transmission capabilities of very high performance, and shake and be distorted extremely low, AES3 type and serial digital can be carried out
Audio input.
The technical scheme is that a kind of real-time audio digiverter, including digital audio optical fiber input interface,
Digital audio coaxial cable input interface, digital audio and video signals isolation coupling circuit, digital signal samples circuit, digital simulation turn
Change circuit, analog audio signal amplifying circuit, analogue audio frequency L channel coaxial cable output interface, analogue audio frequency right channel is coaxial
Cable-out interface；The digital audio optical fiber input interface sum number word tone high frequency coaxial cable input interface and digital audio and video signals
Isolation coupling circuit is connected, and digital audio and video signals isolation coupling circuit is connected with digital signal samples circuit, digital signal samples
Circuit is connected with D/A conversion circuit, and D/A conversion circuit is connected with analog audio signal amplifying circuit, analog audio
Frequency signal amplification circuit and analogue audio frequency L channel coaxial cable output interface, analogue audio frequency right channel coaxial cable output interface
It is connected.
The digital audio and video signals isolation coupling circuit includes the capacitor C1 that definite value is 100nF, the resistance that definite value is 110
The digital audio isolating transformer of R1, model ST-DV709；The one end the capacitor C1 and digital audio isolating transformer ST-
2 ports of DV709 are connected, 1 end of the other end and digital audio optical fiber input interface sum number word tone high frequency coaxial cable input interface
Mouth is connected, and change is isolated with digital audio for 2 ports of digital audio optical fiber input interface sum number word tone high frequency coaxial cable input interface
1 port of depressor ST-DV709 is connected；The 3 port phases of the one end the resistance R1 and digital audio isolating transformer ST-DV709
Even, the other end is connected with 4 ports of digital audio isolating transformer ST-DV709.
The digital signal samples circuit includes digitized audio samples chip CS8420, and definite value is the inductance L1 of 1mH, definite value
For the capacitor C3 of 47uF, definite value is the resistance R5 of 47k, and definite value is the capacitor C4 of 1nF, and definite value is the capacitor C5 of 0.47uF, definite value
For the capacitor C2 of 0.47uF, definite value is the resistance R3 of 1.8k, and definite value is the resistance R2 of 10k, the resistance R4 that definite value is 330, definite value
For the resistance R6 of 10k, definite value is the capacitor C6 of 10uF, and definite value is the resistance R9 of 47k, and definite value is the resistance R10 of 47k, and definite value is
The resistance R15 of 10k, definite value are the capacitor C7 of 1nF, and definite value is the capacitor C8 of 0.47uF, and definite value is the resistance R11 of 47k, and definite value is
330 resistance R12, the resistance R13 that definite value is 330, the resistance R14 that definite value is 330, definite value are the resistance R8 of 22k；The inductance
The one end L1 is connected with 5V DC power supply VCC, and the other end is connected with one end of resistance R5；The one end the resistance R7 and 5V DC power supply
VCC is connected, and the other end is with digitized audio samples chip CS8420'sPort is connected；The one end the capacitor C3 and inductance L1
It is connected, the other end is connected with ground GND；The capacitor C4 and the one end C5 are connected with inductance L1, and with digitized audio samples chip
The port VA+ of CS8420 is connected, and the other end is connected with the port AGND of digitized audio samples chip CS8420；The capacitor C2 mono-
End is connected with ground GND, and the other end is connected with the resistance R3；The other end and digitized audio samples chip of the resistance R3
The port FILT of CS8420 is connected；The one end the resistance R2 is connected with ground GND, the other end and digitized audio samples chip CS8420
The port RMCK be connected；The one end the resistance R4 is connected with the port RMCK of digitized audio samples chip CS8420, the other end with
The port MCLK of the analog-digital chip CS4334 is connected；The resistance R9 and the one end R10 are connected with 5V DC power supply VCC,
The other end is connected with the port SCL/CCLK of digitized audio samples chip CS8420；The one end the resistance R15 and 5V DC power supply
VCC is connected, and the other end is with digitized audio samples chip CS8420'sPort is connected；The capacitor C7 and the one end C8 and 5V
DC power supply VCC is connected, and is connected with the port VD+ of digitized audio samples chip CS8420, and the other end is connected with ground GND, and
It is connected with the port OMCK of digitized audio samples chip CS8420；The port DGND of the digitized audio samples chip CS8420 with
The port OMCK of digitized audio samples chip CS8420 is connected；The one end the resistance R11 and digitized audio samples chip CS8420
The port U be connected, the other end with GND be connected；The STOUT of the one end the resistance R12 and digitized audio samples chip CS8420
Port is connected, and the other end is connected with the port SDATA of the analog-digital chip CS4334；The one end the resistance R13 and number
The port OLRCK of audio sample chip CS8420 is connected, the port the LRCK phase of the other end and the analog-digital chip CS4334
Even；The one end the resistance R14 is connected with the port OSCLK of digitized audio samples chip CS8420, and the other end and the digital-to-analogue turn
The port SCLK for changing chip CS4334 is connected；The port the TCBL phase of the one end the resistance R8 and digitized audio samples chip CS8420
Even, the other end is connected with ground GND.
The D/A conversion circuit includes analog-digital chip CS4334, and definite value is resistance R16, R17 of 267k, fixed
Value is capacitor C9, C10 of 3.3uF, and definite value is resistance R18, R19 of 100k, and resistance R20, R21 that definite value is 560, definite value is
Capacitor C11, C12 of 47nF, definite value are slide rheostat R22, R23 of 100k；One end of the resistance R16 and the digital-to-analogue turn
The port AOUTL for changing chip CS4334 is connected, and the other end is connected with ground GND；Positive one end of the capacitor C9 and the digital-to-analogue
The port AOUTL of conversion chip CS4334 is connected, and cathode one end is connected with one end of resistance R18；The other end of the resistance R18
It is connected with ground GND；One end of the resistance R20 is connected with capacitor C19 cathode one end, and the other end is connected with capacitor C11；The electricity
The other end for holding C11 is connected with ground GND；The left end of the slide rheostat R22 is connected with one end of capacitor C11, right end and ground
GND is connected, and intermediate one end is connected with the LOUT input terminal of the analog audio signal amplifying circuit；One end of the resistance R17
It is connected with the port AOUTR of the analog-digital chip CS4334, the other end is connected with ground GND；The anode one of the capacitor C10
End is connected with the port AOUTR of the analog-digital chip CS4334, and cathode one end is connected with one end of resistance R19；The electricity
The other end for hindering R19 is connected with ground GND；One end of the resistance R21 is connected with capacitor C10 cathode one end, the other end and capacitor
C12 is connected；The other end of the capacitor C12 is connected with ground GND；The left end of the slide rheostat R23 and one end of capacitor C11
It is connected, right end is connected with ground GND, and intermediate one end is connected with the ROUT input terminal of the analog audio signal amplifying circuit.
The analog audio signal amplifying circuit includes the operational amplifier chip of model TL084, and definite value is the electricity of 1k
R25, R27 are hindered, definite value is slide rheostat R24, R25 of 500K, and definite value is capacitor C13, C14 of 100pF, the left sound of analogue audio frequency
Road coaxial cable output interface, analogue audio frequency right channel coaxial cable output interface；The 4 of the operational amplifier chip TL084
Port is connected with external dc power+12V；11 ports of the operational amplifier chip TL084 and external dc power -12V
It is connected；3 ports of the operational amplifier chip TL084 are connected with ground GND；One end of the resistance R25 and digital simulation turn
The output end LOUT for changing circuit is connected, and the other end is connected with 2 ports of the operational amplifier chip TL084；The sliding becomes
The left end of resistance device R24 is connected with 2 ports of the operational amplifier chip TL084, and right end and intermediate one end are put with the operation
1 port of big device chip TL084 is connected；1 port of the operational amplifier chip TL084 and the operational amplifier chip
6 ports of TL084 are connected；7 ends of 6 ports of the operational amplifier chip TL084 and the operational amplifier chip TL084
Mouth is connected；One end of the capacitor C13 is connected with 7 ports of the operational amplifier chip TL084, the other end and ground GND phase
Even；1 port of the analogue audio frequency L channel coaxial cable output interface and 7 ports of the operational amplifier chip TL084
It is connected, 2 ports are connected with ground GND；10 ports of the operational amplifier chip TL084 are connected with ground GND；The resistance R27
One end be connected with the output end ROUT of D/A conversion circuit, 9 ends of the other end and the operational amplifier chip TL084
Mouth is connected；The left end of the slide rheostat R26 is connected with 9 ports of the operational amplifier chip TL084, right end and centre
One end is connected with 8 ports of the operational amplifier chip TL084；8 ports of the operational amplifier chip TL084 with it is described
13 ports of operational amplifier chip TL084 are connected；13 ports of the operational amplifier chip TL084 and the operation amplifier
14 ports of device chip TL084 are connected；The 14 port phases of one end of the capacitor C14 and the operational amplifier chip TL084
Even, the other end is connected with ground GND；1 port of the analogue audio frequency right channel coaxial cable output interface and the operation amplifier
14 ports of device chip TL084 are connected, and 2 ports are connected in GND.
The beneficial effects of the present invention are: analogue audio frequency can be converted to digital audio in real time, it is delayed small, real-time is high,
Strong antijamming capability, entire circuit is small in size, light weight, has the signal modulation ability and signal transmission capabilities of very high performance,
And shake and be distorted extremely low, can carry out AES3 type and serial digital audio input, and the invention have it is economical pervasive well
Property.
Detailed description of the invention
Fig. 1 is functional circuit connection block diagram of the invention；
Fig. 2 is digital audio and video signals isolation coupling circuit diagram of the invention；
Fig. 3 is digital signal samples circuit diagram of the invention；
Fig. 4 is D/A conversion circuit figure of the invention；
Fig. 5 is analog audio signal amplification circuit diagram of the invention.
Specific embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1: as shown in Figure 1, a kind of real-time audio digiverter, including digital audio optical fiber input interface 1,
Digital audio coaxial cable input interface 2, digital audio and video signals isolation coupling circuit 3, digital signal samples circuit 4, digital mould
Quasi- conversion circuit 5, analog audio signal amplifying circuit 6, analogue audio frequency L channel coaxial cable output interface 7, analogue audio frequency are right
Sound channel coaxial cable output interface 8；1 sum number word tone high frequency coaxial cable input interface 2 of the digital audio optical fiber input interface with
Digital audio and video signals isolation coupling circuit 3 is connected, digital audio and video signals isolation coupling circuit 3 and 4 phase of digital signal samples circuit
Even, digital signal samples circuit 4 is connected with D/A conversion circuit 5, and D/A conversion circuit 5 is put with analog audio signal
Big circuit 6 is connected, and analog audio signal amplifying circuit 6 and analogue audio frequency L channel coaxial cable output interface 7, analogue audio frequency are right
Sound channel coaxial cable output interface 8 is connected.
Further, the digital audio and video signals isolation coupling circuit 3 includes the capacitor C1 that definite value is 100nF, and definite value is
The digital audio isolating transformer of 110 resistance R1, model ST-DV709；Change is isolated with digital audio for the one end the capacitor C1
2 ports of depressor ST-DV709 are connected, and the other end connects with the input of 1 sum number word tone high frequency coaxial cable of digital audio optical fiber input interface
1 port of mouth 2 is connected, 2 ports of 1 sum number word tone high frequency coaxial cable input interface 2 of digital audio optical fiber input interface and number
1 port of voice frequency isolation transformer ST-DV709 is connected；The one end the resistance R1 and digital audio isolating transformer ST-DV709
3 ports be connected, the other end is connected with 4 ports of digital audio isolating transformer ST-DV709.
Further, the digital signal samples circuit 4 includes digitized audio samples chip CS8420, and definite value is 1mH's
Inductance L1, definite value are the capacitor C3 of 47uF, and definite value is the resistance R5 of 47k, and definite value is the capacitor C4 of 1nF, and definite value is 0.47uF's
Capacitor C5, definite value are the capacitor C2 of 0.47uF, and definite value is the resistance R3 of 1.8k, and definite value is the resistance R2 of 10k, and definite value is 330
Resistance R4, definite value are the resistance R6 of 10k, and definite value is the capacitor C6 of 10uF, and definite value is the resistance R9 of 47k, and definite value is the resistance of 47k
R10, definite value are the resistance R15 of 10k, and definite value is the capacitor C7 of 1nF, and definite value is the capacitor C8 of 0.47uF, and definite value is the resistance of 47k
R11, the resistance R12 that definite value is 330, the resistance R13 that definite value is 330, the resistance R14 that definite value is 330, definite value are the resistance of 22k
R8；The one end the inductance L1 is connected with 5V DC power supply VCC, and the other end is connected with one end of resistance R5；The one end the resistance R7
It is connected with 5V DC power supply VCC, the other end is with digitized audio samples chip CS8420'sPort is connected；The capacitor C3
One end is connected with inductance L1, and the other end is connected with ground GND；The capacitor C4 and the one end C5 are connected with inductance L1, and with digital sound
The port VA+ of frequency sampling chip CS8420 is connected, and the other end is connected with the port AGND of digitized audio samples chip CS8420；Institute
It states the one end capacitor C2 to be connected with ground GND, the other end is connected with the resistance R3；The other end of the resistance R3 is adopted with digital audio
The port FILT of sample chip CS8420 is connected；The one end the resistance R2 is connected with ground GND, the other end and digitized audio samples chip
The port RMCK of CS8420 is connected；The one end the resistance R4 is connected with the port RMCK of digitized audio samples chip CS8420, separately
One end is connected with the port MCLK of the analog-digital chip CS4334；The resistance R9 and the one end R10 and 5V DC power supply VCC
It is connected, the other end is connected with the port SCL/CCLK of digitized audio samples chip CS8420；The one end the resistance R15 and 5V direct current
Power supply VCC is connected, and the other end is with digitized audio samples chip CS8420'sPort is connected；The capacitor C7 and the one end C8
It is connected with 5V DC power supply VCC, and is connected with the port VD+ of digitized audio samples chip CS8420, the other end and ground GND phase
Even, and it is connected with the port OMCK of digitized audio samples chip CS8420；The DGND of the digitized audio samples chip CS8420
Port is connected with the port OMCK of digitized audio samples chip CS8420；The one end the resistance R11 and digitized audio samples chip
The port U of CS8420 is connected, and the other end is connected with ground GND；The one end the resistance R12 is with digitized audio samples chip CS8420's
The port STOUT is connected, and the other end is connected with the port SDATA of the analog-digital chip CS4334；The one end the resistance R13 with
The port OLRCK of digitized audio samples chip CS8420 is connected, the end LRCK of the other end and the analog-digital chip CS4334
Mouth is connected；The one end the resistance R14 is connected with the port OSCLK of digitized audio samples chip CS8420, the other end and the number
The port SCLK of mould conversion chip CS4334 is connected；The end TCBL of the one end the resistance R8 and digitized audio samples chip CS8420
Mouth is connected, and the other end is connected with ground GND.
Further, the D/A conversion circuit 5 includes analog-digital chip CS4334, and definite value is the resistance of 267k
R16, R17, definite value be 3.3uF capacitor C9, C10, definite value be 100k resistance R18, R19, definite value be 560 resistance R20,
R21, definite value are capacitor C11, C12 of 47nF, and definite value is slide rheostat R22, R23 of 100k；One end of the resistance R16 with
The port AOUTL of the analog-digital chip CS4334 is connected, and the other end is connected with ground GND；Positive one end of the capacitor C9
It is connected with the port AOUTL of the analog-digital chip CS4334, cathode one end is connected with one end of resistance R18；The resistance
The other end of R18 is connected with ground GND；One end of the resistance R20 is connected with capacitor C19 cathode one end, the other end and capacitor C11
It is connected；The other end of the capacitor C11 is connected with ground GND；One end phase of the left end of the slide rheostat R22 and capacitor C11
Even, right end is connected with ground GND, and intermediate one end is connected with the LOUT input terminal of the analog audio signal amplifying circuit 6；The electricity
One end of resistance R17 is connected with the port AOUTR of the analog-digital chip CS4334, and the other end is connected with ground GND；The capacitor
Positive one end of C10 is connected with the port AOUTR of the analog-digital chip CS4334, one end of cathode one end and resistance R19
It is connected；The other end of the resistance R19 is connected with ground GND；One end of the resistance R21 is connected with capacitor C10 cathode one end, separately
One end is connected with capacitor C12；The other end of the capacitor C12 is connected with ground GND；The left end of the slide rheostat R23 and electricity
The one end for holding C11 is connected, and right end is connected with ground GND, and the ROUT of intermediate one end and the analog audio signal amplifying circuit 6 is inputted
End is connected.
Further, the analog audio signal amplifying circuit 6 includes the operational amplifier chip of model TL084, fixed
Value is resistance R25, R27 of 1k, and definite value is slide rheostat R24, R25 of 500K, and definite value is capacitor C13, C14 of 100pF, mould
Quasi- audio L channel coaxial cable output interface 7, analogue audio frequency right channel coaxial cable output interface 8；The operational amplifier
4 ports of chip TL084 are connected with external dc power+12V；11 ports and outside of the operational amplifier chip TL084
DC power supply -12V is connected；3 ports of the operational amplifier chip TL084 are connected with ground GND；One end of the resistance R25
It is connected with the output end LOUT of D/A conversion circuit 5,2 port phases of the other end and the operational amplifier chip TL084
Even；The left end of the slide rheostat R24 is connected with 2 ports of the operational amplifier chip TL084, right end and intermediate one end
It is connected with 1 port of the operational amplifier chip TL084；1 port of the operational amplifier chip TL084 and the operation
6 ports of amplifier chip TL084 are connected；6 ports of the operational amplifier chip TL084 and the operational amplifier chip
7 ports of TL084 are connected；One end of the capacitor C13 is connected with 7 ports of the operational amplifier chip TL084, the other end
It is connected with ground GND；1 port of the analogue audio frequency L channel coaxial cable output interface 7 and the operational amplifier chip
7 ports of TL084 are connected, and 2 ports are connected with ground GND；10 ports of the operational amplifier chip TL084 are connected with ground GND；
One end of the resistance R27 is connected with the output end ROUT of D/A conversion circuit 5, the other end and the operational amplifier core
9 ports of piece TL084 are connected；9 port phases of the left end of the slide rheostat R26 and the operational amplifier chip TL084
Even, right end and intermediate one end are connected with 8 ports of the operational amplifier chip TL084；The operational amplifier chip TL084
8 ports be connected with 13 ports of the operational amplifier chip TL084；13 ports of the operational amplifier chip TL084
It is connected with 14 ports of the operational amplifier chip TL084；One end of the capacitor C14 and the operational amplifier chip
14 ports of TL084 are connected, and the other end is connected with ground GND；1 end of the analogue audio frequency right channel coaxial cable output interface 8
Mouth is connected with 14 ports of the operational amplifier chip TL084, and 2 ports are connected in GND.
The working principle of the invention is: first being believed the digital audio of input with digital audio isolating transformer ST-DV709
Number by 1:1 transformation and it is isolated, coupled, to ensure that the security isolation of electric signal, is avoided due to impedance and level not
Then the problem of pole decoding device can not lock digital signal after caused by matching uses CS8420 pairs of digitized audio samples chip
Digital audio and video signals are sampled, then carry out the conversion of digital signal to analog signal by analog-digital chip CS4334, most
Processing is amplified to the left and right sound track signals of analogue audio frequency respectively with operational amplifier TL084 afterwards, is output to corresponding interface.
In conjunction with attached drawing, the embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned
Embodiment within the knowledge of a person skilled in the art can also be before not departing from present inventive concept
Put that various changes can be made.
Claims (5)
1. a kind of real-time audio digiverter, it is characterised in that: including digital audio optical fiber input interface (1), digital sound
High frequency coaxial cable input interface (2), digital audio and video signals isolation coupling circuit (3), digital signal samples circuit (4), digital mould
Quasi- conversion circuit (5), analog audio signal amplifying circuit (6), analogue audio frequency L channel coaxial cable output interface (7), simulation
Audio right channel coaxial cable output interface (8)；Digital audio optical fiber input interface (1) the sum number word tone high frequency coaxial cable is defeated
Incoming interface (2) is connected with digital audio and video signals isolation coupling circuit (3), digital audio and video signals isolation coupling circuit (3) and number
Signal sample circuit (4) is connected, and digital signal samples circuit (4) is connected with D/A conversion circuit (5), digital-to-analogue conversion
Circuit (5) is connected with analog audio signal amplifying circuit (6), analog audio signal amplifying circuit (6) and analogue audio frequency L channel
Coaxial cable output interface (7), analogue audio frequency right channel coaxial cable output interface (8) are connected.
2. real-time audio digiverter according to claim 1, it is characterised in that: the digital audio and video signals isolation
Coupling circuit (3) include the capacitor C1 that definite value is 100nF, the resistance R1 that definite value is 110, the digital audio of model ST-DV709
Isolating transformer；The one end the capacitor C1 is connected with 2 ports of digital audio isolating transformer ST-DV709, the other end and number
1 port of audio optical fibre input interface (1) sum number word tone high frequency coaxial cable input interface (2) is connected, the input of digital audio optical fiber
2 ports of interface (1) sum number word tone high frequency coaxial cable input interface (2) and 1 end of digital audio isolating transformer ST-DV709
Mouth is connected；The one end the resistance R1 is connected with 3 ports of digital audio isolating transformer ST-DV709, the other end and digital audio
4 ports of isolating transformer ST-DV709 are connected.
3. real-time audio digiverter according to claim 1, it is characterised in that: the digital signal samples circuit
It (4) include digitized audio samples chip CS8420, definite value is the inductance L1 of 1mH, and definite value is the capacitor C3, definite value 47k of 47uF
Resistance R5, definite value is the capacitor C4 of 1nF, and definite value is the capacitor C5 of 0.47uF, and definite value is the capacitor C2 of 0.47uF, and definite value is
The resistance R3 of 1.8k, definite value are the resistance R2 of 10k, and the resistance R4 that definite value is 330, definite value is the resistance R6, definite value 10uF of 10k
Capacitor C6, definite value is the resistance R9 of 47k, and definite value is the resistance R10 of 47k, and definite value is the resistance R15 of 10k, and definite value is 1nF
Capacitor C7, definite value are the capacitor C8 of 0.47uF, and definite value is the resistance R11 of 47k, and the resistance R12 that definite value is 330, definite value is 330
Resistance R13, the resistance R14 that definite value is 330, definite value are the resistance R8 of 22k；The one end the inductance L1 and 5V DC power supply VCC phase
Even, the other end is connected with one end of resistance R5；The one end the resistance R7 is connected with 5V DC power supply VCC, the other end and digital sound
Frequency sampling chip CS8420'sPort is connected；The one end the capacitor C3 is connected with inductance L1, the other end and ground GND phase
Even；The capacitor C4 and the one end C5 are connected with inductance L1, and are connected with the port VA+ of digitized audio samples chip CS8420, separately
One end is connected with the port AGND of digitized audio samples chip CS8420；The one end the capacitor C2 with ground GND be connected, the other end and
The resistance R3 is connected；The other end of the resistance R3 is connected with the port FILT of digitized audio samples chip CS8420；It is described
The one end resistance R2 is connected with ground GND, and the other end is connected with the port RMCK of digitized audio samples chip CS8420；The resistance R4
One end is connected with the port RMCK of digitized audio samples chip CS8420, and the other end is with the analog-digital chip CS4334's
The port MCLK is connected；The resistance R9 and the one end R10 are connected with 5V DC power supply VCC, the other end and digitized audio samples chip
The port SCL/CCLK of CS8420 is connected；The one end the resistance R15 is connected with 5V DC power supply VCC, the other end and digital audio
Sampling A/D chip CS8420'sPort is connected；The capacitor C7 and the one end C8 are connected with 5V DC power supply VCC, and with number
The port VD+ of audio sample chip CS8420 is connected, the other end with GND be connected, and with digitized audio samples chip CS8420
The port OMCK be connected；The port DGND of the digitized audio samples chip CS8420 is with digitized audio samples chip CS8420's
The port OMCK is connected；The one end the resistance R11 is connected with the port U of digitized audio samples chip CS8420, the other end and ground GND
It is connected；The one end the resistance R12 is connected with the port STOUT of digitized audio samples chip CS8420, the other end and the digital-to-analogue
The port SDATA of conversion chip CS4334 is connected；The OLRCK of the one end the resistance R13 and digitized audio samples chip CS8420
Port is connected, and the other end is connected with the port LRCK of the analog-digital chip CS4334；The one end the resistance R14 and digital sound
The port OSCLK of frequency sampling chip CS8420 is connected, and the other end is connected with the port SCLK of the analog-digital chip CS4334；
The one end the resistance R8 is connected with the port TCBL of digitized audio samples chip CS8420, and the other end is connected with ground GND.
4. real-time audio digiverter according to claim 1, it is characterised in that: the D/A conversion circuit
It (5) include analog-digital chip CS4334, definite value is resistance R16, R17 of 267k, and definite value is capacitor C9, C10 of 3.3uF, fixed
Value is resistance R18, R19 of 100k, and resistance R20, R21 that definite value is 560, definite value is capacitor C11, C12 of 47nF, and definite value is
Slide rheostat R22, R23 of 100k；The port AOUTL of one end of the resistance R16 and the analog-digital chip CS4334
It is connected, the other end is connected with ground GND；The end AOUTL of positive one end of the capacitor C9 and the analog-digital chip CS4334
Mouth is connected, and cathode one end is connected with one end of resistance R18；The other end of the resistance R18 is connected with ground GND；The resistance R20
One end be connected with capacitor C19 cathode one end, the other end is connected with capacitor C11；The other end of the capacitor C11 and ground GND phase
Even；The left end of the slide rheostat R22 is connected with one end of capacitor C11, right end with ground GND be connected, intermediate one end with it is described
The LOUT input terminal of analog audio signal amplifying circuit (6) is connected；One end of the resistance R17 and the analog-digital chip
The port AOUTR of CS4334 is connected, and the other end is connected with ground GND；Positive one end of the capacitor C10 and the digital-to-analogue conversion core
The port AOUTR of piece CS4334 is connected, and cathode one end is connected with one end of resistance R19；The other end and ground of the resistance R19
GND is connected；One end of the resistance R21 is connected with capacitor C10 cathode one end, and the other end is connected with capacitor C12；The capacitor
The other end of C12 is connected with ground GND；The left end of the slide rheostat R23 is connected with one end of capacitor C11, right end and ground GND
It is connected, intermediate one end is connected with the ROUT input terminal of the analog audio signal amplifying circuit (6).
5. real-time audio digiverter according to claim 1, it is characterised in that: the analog audio signal amplification
Circuit (6) includes the operational amplifier chip of model TL084, and definite value is resistance R25, R27 of 1k, and definite value is the sliding of 500K
Rheostat R24, R25, definite value are capacitor C13, C14 of 100pF, analogue audio frequency L channel coaxial cable output interface (7), simulation
Audio right channel coaxial cable output interface (8)；4 ports of the operational amplifier chip TL084 and external dc power+
12V is connected；11 ports of the operational amplifier chip TL084 are connected with external dc power -12V；The operational amplifier
3 ports of chip TL084 are connected with ground GND；One end of the resistance R25 and the output end of D/A conversion circuit (5)
LOUT is connected, and the other end is connected with 2 ports of the operational amplifier chip TL084；The left end of the slide rheostat R24 with
2 ports of the operational amplifier chip TL084 are connected, right end and intermediate one end and the 1 of the operational amplifier chip TL084
Port is connected；1 port of the operational amplifier chip TL084 is connected with 6 ports of the operational amplifier chip TL084；
6 ports of the operational amplifier chip TL084 are connected with 7 ports of the operational amplifier chip TL084；The capacitor
One end of C13 is connected with 7 ports of the operational amplifier chip TL084, and the other end is connected with ground GND；The analogue audio frequency
1 port of L channel coaxial cable output interface (7) is connected with 7 ports of the operational amplifier chip TL084,2 ports with
Ground GND is connected；10 ports of the operational amplifier chip TL084 are connected with ground GND；One end of the resistance R27 and number
The output end ROUT of analog conversion circuit (5) is connected, and the other end is connected with 9 ports of the operational amplifier chip TL084；Institute
The left end for stating slide rheostat R26 is connected with 9 ports of the operational amplifier chip TL084, right end and intermediate one end and institute
8 ports for stating operational amplifier chip TL084 are connected；8 ports of the operational amplifier chip TL084 and the operation amplifier
13 ports of device chip TL084 are connected；13 ports of the operational amplifier chip TL084 and the operational amplifier chip
14 ports of TL084 are connected；One end of the capacitor C14 is connected with 14 ports of the operational amplifier chip TL084, another
End is connected with ground GND；1 port of the analogue audio frequency right channel coaxial cable output interface (8) and the operational amplifier core
14 ports of piece TL084 are connected, and 2 ports are connected in GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810839042.2A CN109067400A (en) | 2018-07-27 | 2018-07-27 | A kind of real-time audio digiverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810839042.2A CN109067400A (en) | 2018-07-27 | 2018-07-27 | A kind of real-time audio digiverter |
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| CN109067400A true CN109067400A (en) | 2018-12-21 |
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| CN201810839042.2A Pending CN109067400A (en) | 2018-07-27 | 2018-07-27 | A kind of real-time audio digiverter |
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| US8525710B1 (en) * | 2010-03-31 | 2013-09-03 | Cirrus Logic, Inc. | Audio amplifier offset reduction using digital input/output comparisons |
| CN203951463U (en) * | 2014-07-15 | 2014-11-19 | 大连捷成实业发展有限公司 | A kind of digital audio revolving die is intended audio conversion circuit |
| CN106656363A (en) * | 2016-12-02 | 2017-05-10 | 昆明理工大学 | Parameter extraction circuit for broadcast supervision receiver and parameter extraction method thereof |
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| US8525710B1 (en) * | 2010-03-31 | 2013-09-03 | Cirrus Logic, Inc. | Audio amplifier offset reduction using digital input/output comparisons |
| CN203951463U (en) * | 2014-07-15 | 2014-11-19 | 大连捷成实业发展有限公司 | A kind of digital audio revolving die is intended audio conversion circuit |
| CN106656363A (en) * | 2016-12-02 | 2017-05-10 | 昆明理工大学 | Parameter extraction circuit for broadcast supervision receiver and parameter extraction method thereof |
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Application publication date: 20181221 |