CN109818674A - A kind of visible light communication wireless broadcast system signal receiving module circuit - Google Patents
A kind of visible light communication wireless broadcast system signal receiving module circuit Download PDFInfo
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- CN109818674A CN109818674A CN201910225982.7A CN201910225982A CN109818674A CN 109818674 A CN109818674 A CN 109818674A CN 201910225982 A CN201910225982 A CN 201910225982A CN 109818674 A CN109818674 A CN 109818674A
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- 238000004891 communication Methods 0.000 title claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 11
- 238000007493 shaping process Methods 0.000 claims abstract description 8
- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005286 illumination Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
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- 238000013519 translation Methods 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000009825 accumulation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The present invention relates to visible light communication wireless broadcast system signal receiving module circuits, comprising: optical signal receiving processing circuit compares shaping circuit, start-up circuit and D class power amplifier；Wherein optical signal receiving processing circuit includes: that the emitter of Q1 meets -9V, while the collector of Q1 connects one end of R1, the other end ground connection of R1；The collector of a termination Q1 of C1, one end of another termination R2 of C1,2 feet of another termination N1 of R2；One end of the 3 feet connection R3 of N1, the other end ground connection of R3；One end of R4, C2 are connected with 2 feet of N1,6 feet of another termination N1 of R4, C2, and R4 and C2 constitute RC circuit, realize one end of the 2 feet connection R5 of the N2 of second amplifying circuit, 6 feet of the other end connection N1 of R5；3 feet of N2 are grounded；Likewise, 2 feet of one end connection N2 of R6, C3.The beneficial effects of the present invention are: being combined together daily LED illumination with the broadcast system in life, and signal-to-noise ratio with higher and sensitivity.
Description
Technical field
The present invention relates to optical communication fields, and more specifically, it is related to a kind of novel visible communication system receiving module.Tool
Body is related to optical signal and receives and handle, Delta-Sigma demodulation techniques, D class power amplifier technology.
Background technique
Visible light communication technology is temporarily without universal at present, the wireless broadcast system receiving module product based on visible light communication compared with
It is few, experimental study is generally stayed in, takes the photoelectric tube of APD to will lead to higher cost, and performance is superfluous.Most of reception scheme
It is poor in receiving portion signal processing, it will lead to signal-to-noise ratio and sensitivity decrease.Meanwhile current power amplifier takes simulation function mostly
It puts, causes to be lost larger, sound quality can not be weighed with power consumption.Multipath effect receives it by market with noise problem.It removes
Except this, current wireless broadcast system poor anti jamming capability vulnerable to other signal interferences, and needs to rob with other wireless devices
Account for frequency spectrum resource.The stability problem of wireless broadcast system can be effectively relieved in this visible light communication wireless broadcast system, have compared with
High s/n ratio is not take up radio spectrum resources.
Summary of the invention
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of visible light communication radio broadcastings that cost is relatively reasonable
System signal reception modular circuit.
Visible light communication wireless broadcast system signal receiving module circuit, comprising: optical signal receiving processing circuit, more whole
Shape circuit, start-up circuit and D class power amplifier；Wherein optical signal receiving processing circuit includes: that the emitter of Q1 meets -9V, simultaneously
The collector of Q1 connects one end of R1, the other end ground connection of R1；The collector of a termination Q1 of C1, the one of another termination R2 of C1
End, 2 feet of another termination N1 of R2.One end of the 3 feet connection R3 of N1, the other end ground connection of R3；The 2 of one end of R4, C2 and N1
Foot is connected, 6 feet of another termination N1 of R4, C2, and R4 and C2 constitute RC circuit, realizes the 2 feet connection of the N2 of second amplifying circuit
One end of R5,6 feet of the other end connection N1 of R5；3 feet of N2 are grounded；Likewise, 2 feet of one end connection N2 of R6, C3, R6,
6 feet of another termination N2 of C3.
As preferred: it is described relatively shaping circuit include: R7 one termination N2 6 feet, 9 feet of another termination N3B of R7,
9 feet of N3B connect one end of R10,7 feet of the other end N3B of R10 simultaneously；Wherein the one of a termination+9V of R8, another termination R9
End, the other end ground connection of R9, R8, R9 constitute bleeder circuit；The junction of the connection of 10 feet R8, R9 of N3B, one end connection of R11
7 feet of N3B, other end connection+9V, as a pull-up resistor.
As preferred: the start-up circuit includes: that 4 feet of N3A connect one end of R12, one end of another termination R13 of R12,
And the junction of R12 and R13 meets+9V；5 feet of another termination N3A of R13；The one of the 5 feet connection R14 of R3A at the same time
The junction ground connection of end, one end of another termination C6 of R14, and R14 and C6；4 feet of another termination N3A of C6；C6's
12 feet that both ends bridge reset button a RST, N3A connect 7 feet of N3B.
As preferred: the D class power amplifier includes: that the base stage of Q2 and Q3 connects together, and is attempted by 7 feet of N3B；Q2 hair
The connection of the emitter of emitter-base bandgap grading and Q3, while connecing on the grid of Q4；The collector of Q2 meets+9V, and the collector of Q3 meets -9V；Q4's
Source electrode meets+9V, and drain electrode meets one end of R15, one end of another termination R16 of R15, another termination -25V of R16；1,3, the 5 of U1
Foot connects the junction of R15 and R16, in addition also connects the anode of D1；The cathode of D1 meets -25V；2,4,6 feet of U1 connect, after connection again
Connect simultaneously with 9,11,13 feet of U1；8,10,12 feet of U1 connect 6 feet of U2；The amplification of signal is realized in U2 and Q5, Q6 cooperation；U2
5 feet connect 13 feet of U1,1 foot of U2 connects power supply and connects the anode of D2 simultaneously, and the cathode of D2 connects 2 feet of U2,2 feet of U2 again with C7
One end be connected, the other end of C7 is connected with 4 feet of U2；3 feet of U2 connect one end of R17, one end of another termination R18 of R17,
4 feet of another termination U2 of R18；The cathode of D3 connects 3 feet of U2 simultaneously, and the anode of D3 connects the junction of R17 and R18；The grid of Q5
Pole connects the anode of D3, and the drain electrode of Q5 meets+25V, and the source level of Q5 connects 4 feet of U2；8 feet of U2 connect one end of R19, the other end of R19
It connects one end of R20,7 feet of another termination U2 of R20 and meets -25V；The cathode of D4 connects 8 feet of U2, the anode of D4 connect R19 with
The junction of R20, the grid of Q6 connect the anode of D4, and the drain electrode of Q6 connects 4 feet of U2, and the source level of Q6 connects 7 feet of U2；Delta-
The drain electrode of the source level and Q6 of one end connection Q5 that the demodulation filter circuit of Sigma is L1, one end of another termination C8 of L1, C8's
Other end ground connection, loudspeaker SPEAKER are then connected in parallel on the both ends of C8.
The beneficial effects of the present invention are: make daily LED illumination and life in broadcast system be combined together, and have compared with
High signal-to-noise ratio and sensitivity.The frequency spectrum pressure of current social can be effectively relieved in this way, and keep broadcast system with higher
Stability.In addition to this, LED's low in energy consumption, energy conservation and environmental protection.
Detailed description of the invention
Fig. 1 is the optical signal receiving processing circuit of the invention patent；
Fig. 2 is the comparator circuit of the invention patent；
Fig. 3 is the start-up circuit of the invention patent；
Fig. 4 is the D class power amplifier of the invention patent.
Specific embodiment
The present invention is described further below with reference to embodiment.The explanation of following embodiments is merely used to help understand this
Invention.It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, also
Can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection scope of the claims in the present invention
It is interior.
A kind of visible light communication wireless broadcast system receiving module that cost is relatively reasonable is provided, realizes photoelectric sensor inspection
Light signal, and it is converted into electric signal, and handle signal by two-stage amplification.Wave distortion is eliminated through comparator again,
Export smoother square wave.Loudspeaker can be driven finally by the carrier power that D class power amplifier improves voice signal, then low through LC
Pass filter filters out the high frequency noise and other noises of high frequency Delta-Sigma modulation accumulation, plays voice signal through loudspeaker.
This Novel photo-communication wireless broadcast system receiving module, comprising: optical signal receiving processing circuit, the optical signal
Receiving processing circuit, which is played, captures LED light signal by sensor, makes its conversion for convenience of the electric signal of processing, then to including language
Electric signal amplification, the filtering of message breath；And comparing shaping circuit, the shaping circuit plays elimination wave distortion, makes square wave
Signal becomes more smoothly and standard；And start-up circuit, the start-up circuit, which is played, realizes that N3A is opened using slow rise of capacitance voltage
Dynamic moment exports low level, realizes that Q6 takes the lead in being connected；And D class power amplifier, the D class power amplifier, it plays and voice is believed
Number carry out power amplification, played again through loudspeaker finally by LC low-pass filtering.
The optical signal receiving processing circuit is two-stage amplifying circuit, and filters with RC that preposition amplification is sacrificed gain and increased
Add bandwidth, postposition main amplifying circuit increase rate gain.
The relatively shaping circuit is a hysteresis comparator, is realized by LM319, and is terminated with pull-up electricity in output
Resistance.
The start-up circuit is reset circuit, is made of LM319 and resistance capacitance and reset button.
The D class power amplifier, by level translation circuit, half-bridge circuit and LC filtering composition separately have a loudspeaker.Specifically
It is related to Q2-Q6, U1-U2 and various types of diodes are several.U1 realizes the split-phase of 1Bit signal stream, forms two-way complementary drive letter
Number, realize that the upper lower switch of half-bridge circuit controls respectively；U2 is half-bridge drive circuit, and the amplification for realizing signal is cooperated with Q5, Q6.
By start-up circuit, pressing RST resets D class power amplifier, realizes that N3A starts moment using slow rise of capacitance voltage
Low level is exported, realizes that Q6 takes the lead in being connected.Make photocell detection optical signal and amplify, the side of positive negative level is exported by comparator
Wave finally passes through D class power amplifier and low-pass filtering, is exported by loudspeaker using level translation circuit.Delta-Sigma demodulation
It can directly be realized by one-stage low-pass wave.
As shown in Figure 1, realizing that optical signal receives the level-one amplification of amplifying circuit, optical signal is captured through PIN photoelectric tube and is generated
Current signal is converted to voltage signal through resistance.The emitter of Q1 meets -9V, while the collector of Q1 connects one end of R1, and R1's is another
One end ground connection；The collector of a termination Q1 of C1, one end of another termination R2 of C1,2 feet of another termination N1 of R2.The 3 of N1
Foot connects one end of R3, the other end ground connection of R3；One end of R4, C2 are connected with 2 feet of N1, and the 6 of another termination N1 of R4, C2
Foot, R4 and C2 constitute RC circuit, play filter action.In addition to this, the one of the 2 feet connection R5 of the N2 of second amplifying circuit is realized
End, 6 feet of the other end connection N1 of R5；3 feet of N2 are grounded；Likewise, 2 feet of one end connection N2 of R6, C3, R6, C3's is another
6 feet of one termination N2, play filter action in addition to amplification.
As shown in Fig. 2, realizing shaping circuit by hysteresis comparator, wherein the one of R7 terminates 6 feet of N2, the other end of R7
9 feet of N3 are connect, while 9 feet of N3 connect one end of R10,7 feet of the other end N3 of R10；Termination+a 9V, another termination R9 of R8
Wherein one end, R9 the other end ground connection, R8, R9 constitute bleeder circuit；The junction of the connection of 10 feet R8, R9 of N3, take its electricity
Press the comparison reference voltage as comparator.7 feet of one end connection N3 of R11, other end connection+9V, as a pull-up electricity
Resistance.
As shown in figure 3, what start-up circuit was realized by LM319, wherein 4 feet of N3A connect one end of R12, the other end of R12
One end of R13 is connect, and the junction of R12 and R13 meets+9V；5 feet of another termination N3A of R13；5 feet of R3A at the same time
Connect the junction ground connection of one end of R14, one end of another termination C6 of R14, and R14 and C6；Another termination N3A's of C6
4 feet；A reset button RST is bridged at the both ends of C6.In addition to this, 12 feet of N3A connect 7 feet of N3B.
As shown in figure 4, level translation circuit is that the base stage of Q2 and Q3 connect together in D class power amplifier, it is attempted by the 7 of N3B
Foot；The connection of the emitter of Q2 emitter and Q3, while connecing on the grid of Q4；The collector of Q2 meets+9V, and the collector of Q3 connects-
9V.The source electrode of Q4 meets+9V, and drain electrode meets one end of R15, one end of another termination R16 of R15, another termination -25V of R16.It is real
DAC in existing D class power amplifier, feature first consist in: U1 realizes the split-phase of signal stream, forms two-way complementary drive square-wave signal,
Realize that the upper lower switch of half-bridge circuit controls respectively；At the same time, 1,3,5 feet of U1 connect the junction of R15 and R16, in addition also
Connect the anode of D1；The cathode of D1 meets -25V；2,4,6 feet of U1 connect, and connect simultaneously with 9,11,13 feet of U1 again after connection；U1
8,10,12 feet connect 6 feet of U2.In addition the half-bridge circuit in DAC, it is characterized in that the amplification of signal is realized in U2 and Q5, Q6 cooperation.
5 feet of U2 connect 13 feet of U1, and 1 foot of U2 connects power supply and connects the anode of D2 simultaneously, and the cathode of D2 connects 2 feet of U2,2 feet of U2 again with
One end of C7 is connected, and the other end of C7 is connected with 4 feet of U2.3 feet of U2 connect one end of R17, and the one of another termination R18 of R17
End, 4 feet of another termination U2 of R18；The cathode of D3 connects 3 feet of U2 simultaneously, and the anode of D3 connects the junction of R17 and R18；Q5's
Grid connects the anode of D3, and the drain electrode of Q5 meets+25V, and the source level of Q5 connects 4 feet of U2.8 feet of U2 connect one end of R19, and R19's is another
The one end for terminating R20,7 feet of another termination U2 of R20 and meets -25V；The cathode of D4 connects 8 feet of U2, and the anode of D4 meets R19
With the junction of R20, the grid of Q6 connects the anode of D4, and the drain electrode of Q6 connects 4 feet of U2, and the source level of Q6 connects 7 feet of U2.Delta-
The drain electrode of the source level and Q6 of one end connection Q5 that the demodulation filter circuit of Sigma is L1, one end of another termination C8 of L1, C8's
Other end ground connection, loudspeaker SPEAKER are then connected in parallel on the both ends of C8.
Claims (4)
1. a kind of visible light communication wireless broadcast system signal receiving module circuit, it is characterised in that: include: optical signal receiving area
Reason circuit compares shaping circuit, start-up circuit and D class power amplifier；Wherein optical signal receiving processing circuit includes: the transmitting of Q1
Pole meets -9V, while the collector of Q1 connects one end of R1, the other end ground connection of R1；The collector of a termination Q1 of C1, C1's is another
Terminate one end of R2,2 feet of another termination N1 of R2；One end of the 3 feet connection R3 of N1, the other end ground connection of R3；The one of R4, C2
End is connected with 2 feet of N1,6 feet of another termination N1 of R4, C2, and R4 and C2 constitute RC circuit, realizes the N2 of second amplifying circuit
2 feet connection R5 one end, R5 the other end connection N1 6 feet；3 feet of N2 are grounded；Likewise, one end of R6, C3 connect N2
2 feet, 6 feet of another termination N2 of R6, C3.
2. visible light communication wireless broadcast system signal receiving module circuit according to claim 1, it is characterised in that: institute
6 feet for comparing that shaping circuit includes: a termination N2 of R7,9 feet of another termination N3B of R7 are stated, while 9 feet of N3B connect R10's
One end, 7 feet of the other end N3B of R10；A termination+9V of R8, wherein one end of another termination R9, the other end ground connection of R9,
R8, R9 constitute bleeder circuit；The junction of the connection of 10 feet R8, R9 of N3B, 7 feet of one end connection N3B of R11, other end connection
+ 9V, as a pull-up resistor.
3. visible light communication wireless broadcast system signal receiving module circuit according to claim 1, it is characterised in that: institute
Stating start-up circuit includes: that 4 feet of N3A connect one end of R12, one end of another termination R13 of R12, and the connection of R12 and R13
Place meets+9V；5 feet of another termination N3A of R13；One end of the 5 feet connection R14 of R3A at the same time, another termination C6's of R14
One end, and the junction ground connection of R14 and C6；4 feet of another termination N3A of C6；A reset button is bridged at the both ends of C6
12 feet of RST, N3A connect 7 feet of N3B.
4. visible light communication wireless broadcast system signal receiving module circuit according to claim 1, it is characterised in that: institute
It states the base stage that D class power amplifier includes: Q2 and Q3 to connect together, is attempted by 7 feet of N3B；The emitter of Q2 emitter and Q3 connect
It connects, while connecing on the grid of Q4；The collector of Q2 meets+9V, and the collector of Q3 meets -9V；The source electrode of Q4 meets+9V, and drain electrode meets R15
One end, one end of another termination R16 of R15, another termination -25V of R16；1,3,5 feet of U1 connect the connection of R15 and R16
Place, in addition also connects the anode of D1；The cathode of D1 meets -25V；2,4,6 feet of U1 connect, after connection again simultaneously with U1 9,11,13
Foot connects；8,10,12 feet of U1 connect 6 feet of U2；The amplification of signal is realized in U2 and Q5, Q6 cooperation；5 feet of U2 connect 13 feet of U1,
1 foot of U2 connects power supply and connects the anode of D2 simultaneously, and the cathode of D2 connects 2 feet of U2, and 2 feet of U2 are connected with one end of C7 again, C7's
The other end is connected with 4 feet of U2；3 feet of U2 meet one end of R17, one end of another termination R18 of R17, another termination U2 of R18
4 feet；The cathode of D3 connects 3 feet of U2 simultaneously, and the anode of D3 connects the junction of R17 and R18；The grid of Q5 meets the anode of D3, Q5
Drain electrode meet+25V, the source level of Q5 connects 4 feet of U2；8 feet of U2 meet one end of R19, one end of another termination R20 of R19, R20
Another termination U2 7 feet and meet -25V；The cathode of D4 connects 8 feet of U2, and the anode of D4 connects the junction of R19 and R20, Q6's
Grid connects the anode of D4, and the drain electrode of Q6 connects 4 feet of U2, and the source level of Q6 connects 7 feet of U2；The demodulation filter circuit of Delta-Sigma
For the drain electrode of the source level and Q6 of one end connection Q5 of L1, one end of another termination C8 of L1, the other end ground connection of C8, loudspeaker
SPEAKER is then connected in parallel on the both ends of C8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910225982.7A CN109818674B (en) | 2019-03-25 | 2019-03-25 | Signal receiving module circuit of visible light communication wireless broadcasting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910225982.7A CN109818674B (en) | 2019-03-25 | 2019-03-25 | Signal receiving module circuit of visible light communication wireless broadcasting system |
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| CN109818674B CN109818674B (en) | 2023-12-15 |
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| CN109818674B (en) | 2023-12-15 |
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