CN107786199A - Single LM324 realizes that the circuit and method of sampling are amplified in two-way decoding all the way - Google Patents
Single LM324 realizes that the circuit and method of sampling are amplified in two-way decoding all the way Download PDFInfo
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- CN107786199A CN107786199A CN201610730973.XA CN201610730973A CN107786199A CN 107786199 A CN107786199 A CN 107786199A CN 201610730973 A CN201610730973 A CN 201610730973A CN 107786199 A CN107786199 A CN 107786199A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/20—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits
Abstract
The invention belongs to wireless power field, more particularly to single LM324 to realize that the circuit and method of sampling are amplified in two-way decoding all the way.The input of circuit is connected with the transmitting coil L1 and sampling resistor R57 of energy transmitting terminal respectively, the output end of circuit is connected with the MCU of energy transmitting terminal, single LM324 in circuit containing envelope detected circuit, with four road discharge circuits, four road discharge circuits are respectively AC signal amplifying circuit, one-level comparison circuit, current signal amplifier circuit, two level comparison circuit, wherein, it is connected between AC signal amplifying circuit and transmitting coil L1 by envelope detected circuit, is connected between AC signal amplifying circuit and MCU by comparison circuit；The input of current signal amplifier circuit is connected with sampling resistor R57, and the output end of current signal amplifier circuit is divided into two-way, is directly connected all the way with MCU, and another way is connected by two level comparison circuit with MCU.The present invention reduces the usage amount of amplifier again while stable data signal is obtained.
Description
Technical field
The invention belongs to wireless power field, more particularly to single LM324 to realize that the electricity of sampling is amplified in two-way decoding all the way
Road and method.
Background technology
The charging of WPC standard radios or the charging of non-WPC standard radios formulated in wireless charging using wireless charging alliance.
But at present in wireless charging scheme only from transmitting coil and resonant capacitance junction end take all the way signal decoded；Or from
The number of winning the confidence is decoded at transmitting coil and sampling resistor two, but circuit is more complicated, it is necessary to 4 tunnel above amplifiers, two LM324
Or LM324 and LM358.In order to realize the process of decoding, periphery circuit design is complicated, internal circuit amplifier usage amount
Excessively, therefore consider how to ensure the stability of signal acquisition on the basis of amplifier usage amount is reduced, be to need to solve at present
The problem of.
The content of the invention
In view of the shortcomings of the prior art, single LM324 provided by the invention realizes that the electricity of sampling is amplified in two-way decoding all the way
Road and method, while stable data signal is obtained, reduce the usage amount of amplifier again.
In order to solve the above technical problems, the present invention, which provides a kind of single LM324, realizes that sampling is amplified in two-way decoding all the way
Circuit, it is characterized in that：The input of the circuit transmitting coil L1 and sampling resistor R57 with energy transmitting terminal respectively
It is connected, the output end of circuit is connected with the MCU of energy transmitting terminal, is transported in the circuit containing envelope detected circuit, with four tunnels
Discharge the single LM324 on road, and four road discharge circuits are respectively that AC signal amplifying circuit, one-level comparison circuit, current signal are put
Big circuit, two level comparison circuit, wherein, pass through envelope detected circuit phase between AC signal amplifying circuit and transmitting coil L1
Even, it is connected between AC signal amplifying circuit and MCU by comparison circuit；The input of current signal amplifier circuit and sampling electricity
R57 connections are hindered, the output end of current signal amplifier circuit is divided into two-way, is directly connected all the way with MCU, and another way passes through two level ratio
It is connected compared with circuit with MCU.
Further, the envelope detection circuit includes low-pass filter network, the electric capacity C33 for logical exchange,
Wherein, low-pass filter network is formed by resistance R39 and electric capacity C30 is in parallel, output end and the electric capacity C33 of low-pass filter network
It is connected；
The envelope detection circuit also includes detector diode D6, current-limiting resistance R48, and wherein detector diode D6 is located at emission lines
Enclose between L1 and current-limiting resistance R48, the input of current-limiting resistance R48 connection low-pass filter networks；
Or current-limiting resistance R48 is between transmitting coil L1 and detector diode D6, detector diode D6 connection LPF nets
The input of network.
Further, the AC signal amplifying circuit include high pass network, ac amplifier circuit, the high pass network by
Electric capacity C36, R46 connect to be formed, and the ac amplifier circuit includes resistance R22, resistance R45, operational amplifier U12A；Resistance
R22 is connected with operational amplifier U12A in-phase input end, and high pass network is connected with operational amplifier U12A inverting input,
Resistance R45 is located between operational amplifier U12A inverting input and operational amplifier U12A output end, operational amplifier
U12A output end is connected with one-level comparison circuit.
Further, the output end of the low-pass filter network in envelope detection circuit and the input of AC signal amplifying circuit
Divider resistance R42, divider resistance R43 are connected between end；Divider resistance R42 one end and the output end phase of low-pass filter network
Even, the other end connects altogether with the resistance R22 in divider resistance R43, amplifying circuit.
Further, the one-level comparison circuit includes low-pass network, operational amplifier U12B, positive feedback resistor R20；Institute
State low-pass network to be formed by R19, electric capacity C24, be connected between the in-phase input end and output end of the operational amplifier U12B
Positive feedback resistor R20, the output end of the low-pass network are connected with operational amplifier U12B inverting input, low-pass network
The resistance of the adjustment just anti-phase sending-end impedances of U12B is connected between output end and operational amplifier U12B normal phase input end
R18, operational amplifier U12B output end connection are improved the resistance R24 of signal impedance；Fortune in the signal amplification circuit
The output end for calculating amplifier U12A is connected with the resistance R18 of one-level comparison circuit and the input of low-pass network, and one-level is more electric
The output end on road is connected to MCU via resistance R24.
Further, the current signal amplifier circuit includes filter circuit, wherein operational amplifier U12C, filter circuit
Formed by resistance R60, electric capacity C34, the input of filter circuit is connected with sampling resistor R57, the output end and fortune of filter circuit
The normal phase input end for calculating amplifier U12C is connected, and operational amplifier U12C inverting input is connected with divider resistance R62, computing
Amplifier U12C output end is by the MCU in resistance R66 connection energy transmitting terminals, in operational amplifier U12C anti-phase input
Divider resistance R63 is connected between end and resistance R66.
Further, the two level comparison circuit includes normal phase input end low-pass network, inverting input low-pass network, fortune
Amplifier U12D is calculated, normal phase input end low-pass network is formed by resistance R21, electric capacity C26, and inverting input low-pass network is by resistance
R23, electric capacity C25 are formed, and the output end of normal phase input end low-pass network is connected with operational amplifier U12D normal phase input end, instead
The output end of phase input low-pass network is connected with operational amplifier U12D inverting input；Operational amplifier U12D output
End is connected with resistance R25；The output end of operational amplifier U12D in the current signal amplifier circuit and two level comparison circuit
Input, the input of inverting input low-pass network of normal phase input end low-pass network connect altogether.
Further, the energy transmitting terminal is the full-bridge circuit or half for being provided with transmitting coil L1 and sampling resistor R57
Bridge circuit, the operational amplifier U12B in the one-level comparison circuit, the operational amplifier U12D in two level comparison circuit difference
Using comparator1, comparator2.
Further, connection carries single LM324 between the full-bridge circuit or half-bridge circuit and MCU in energy transmitting terminal
Circuit, the signal in energy transmitting terminal is realized two-way decoding all the way Current amplifier sample, on the basis of the claims
On, the circuit analytic signal, the signal after parsing is supplied to the MCU in energy transmitting terminal；The signal is divided into two-way letter
Number, signal is from the ac voltage signal for being superimposed upon transmitting coil L1 all the way, and another way signal is from passing through sampling resistor R57's
Current signal.
Further, the decoding process of signal is that envelope detection circuit obtains alternating voltage letter at transmitting coil 1 all the way
Number, after after AC signal amplifying circuit is amplified enter one-level comparison circuit reduce after data signal I, completion
To the decoding effort of signal all the way, obtained data signal I is connected to MCU；
The decoding process of another way signal is that the data signal being superimposed upon on current signal is passed through after current signal amplifier circuit,
Pass through two level comparison circuit again, reduction generation data signal II, complete the decoding effort to another way signal, the numeral that will be obtained
Signal I is connected to MCU.
Further, it is to be superimposed upon electric current letter for Current amplifier sampling process in the decoding process of another way signal
By after current signal amplifier circuit, current signal is sent in energy transmitting terminal, progress AD is adopted data signal on number in MCU
Sample.
Compared with prior art, it is beneficial in that the present invention：The present invention only need 4 tunnel amplifiers be single LM324 just
It can realize and coil and sampling resistor end two paths of signals are decoded, while realize that Current amplifier samples all the way.The present invention is obtaining surely
While determining data signal, reduce the usage amount of amplifier again, while optimize peripheral circuit device, be allowed to more succinct steady
It is fixed, it is easy to be laid out.
Brief description of the drawings
Fig. 1 is the connection diagram one of dual decoding current amplification circuit and external circuitses of the present invention；
Fig. 2 is the connection diagram two of dual decoding current amplification circuit and external circuitses of the present invention；
Fig. 3 is the principle schematic one of structure dual decoding current amplification circuit of the present invention；
Fig. 4 is the principle schematic two of structure dual decoding current amplification circuit of the present invention；
Fig. 5 is the principle schematic two of structure dual decoding current amplification circuit of the present invention.
Embodiment
1 to accompanying drawing 5 referring to the drawings, embodiment of the invention is provided, for being done furtherly to the present invention
It is bright.
Embodiment 1：
In the wireless charging of WPC standards, energy transmitting terminal, can be in energy transmitting terminal when electric energy is sent into energy transmitting terminal
Portion adjusts current transmitting-receiving power in real time, and the present embodiment is exactly to handle inside energy transmitting terminal for current transmitting-receiving power
Adjustment, the electric current of current energy transmitting terminal, voltage condition are supplied to the MCU of energy transmitting terminal in the lump.
The circuit that Current amplifier samples all the way of two-way decoding in the present embodiment is realized based on single LM324, at this
The MCU for energy transmitting terminal of decoded signal and sample rate current is received in embodiment, energy transmitting terminal be provided with respectively with
Sampling resistor R57, the transmitting coil L1 of circuit input end connection.
The input of circuit is connected with transmitting coil one end of energy transmitting terminal, and transmitting coil is L1 in the present embodiment,
It is connected with resonant capacitance C3, and the output end of circuit is connected with the MCU of energy transmitting terminal.Contain envelope detected circuit in circuit
101st, the single LM324 with four road discharge circuits, four road discharge circuits are respectively AC signal amplifying circuit 102, one-level ratio
Compared with circuit 103, current signal amplifier circuit 104, two level comparison circuit 105, wherein, AC signal amplifying circuit is launched with energy
It is connected between the transmitting coil L1 at end by envelope detected circuit, between the MCU of AC signal amplifying circuit and energy transmitting terminal
It is connected by comparison circuit；The input of current signal amplifier circuit is connected with the sampling resistor R57 of energy transmitting terminal, electric current letter
The output end of number amplifying circuit is divided into two-way, and the MCU directly with energy transmitting terminal is connected all the way, and another way is more electric by two level
Road is connected with the MCU of energy transmitting terminal.
The input of circuit has two-way input signal in the present embodiment, and input signal N101 is on transmitting coil L1
Energy signal AC Voltage, input signal N102 carry out the acquisition current signal Current at sampling resistor R57；Circuit
Output end has three-way output signal, and output signal N104 is that the Decode1 obtained after being decoded to the signal from N101 connects
Enter the MCU of transmitting terminal, output signal N103 is the Decode2 access transmitting terminals obtained after being decoded to the signal from N102
MCU, output signal N105 be to N102 after current signal amplifier circuit is handled directly to the sampled signal of acquisition
Amplified Current are sent to the MCU106 of transmitting terminal.
Two-way decoding is being realized all the way in the circuit of Current amplifier sampling, envelope detection circuit is from being superimposed upon transmitting coil L1
On energy signal in, the energy signal i.e. ac voltage signal, detect low frequency communication signal, the low frequency communication signal phase
To weaker, realizing that signal amplifies by AC signal amplifying circuit, then be compared by one-level comparison circuit, reduction generation
Data signal I.
Current signal is obtained at sampling resistor R57, the data signal being superimposed upon on current signal is passed through with current signal
After current signal amplifier circuit amplifies to current signal, MCU is sent to carry out AD samplings as current signal all the way, all the way by two level
Comparison circuit, the reduction generation data signal II in the presence of low-pass filter network and operational amplifier.
Envelope detection circuit includes detector diode D6, low-pass filter network, current-limiting resistance R48, electric capacity C43.
Wherein, current-limiting resistance R48 is between detector diode D6 and the input of low-pass filter network, LPF net
Network is formed by resistance R39 and electric capacity C30 is in parallel, and the output end of low-pass filter network is additionally provided with the electric capacity C33 for logical exchange.
Detector diode D6 uses Schottky diode in the present embodiment, and detector diode D6 intercepts half-wave from carrier wave,
Current-limiting resistance R48 current limliting, high frequency is filtered by low-pass filter network, obtains the signal of communication of low frequency, after remove directly through C33
Stream, is then superimposed upon R43, on the DC voltage obtained by R42 partial pressures, sets R43, R42 to be herein to play partial pressure effect.
AC signal amplifying circuit includes high pass network, ac amplifier circuit, and the high pass network is gone here and there by electric capacity C36, R46
Connection is formed, and ac amplifier circuit includes resistance R22, resistance R45, operational amplifier U12A；Resistance R22 and operational amplifier U12A
In-phase input end be connected, high pass network is connected with operational amplifier U12A inverting input, and resistance R45 is located at operation amplifier
Between device U12A inverting input and operational amplifier U12A output end, operational amplifier U12A output end and one-level ratio
It is connected compared with circuit.
Due to the high pass network of R46, C36 composition, with U12A, the amplifying circuit of R22, R45 composition is jointly to carrying out spontaneous emission
AC signal in coil L1 low frequency communication signal is amplified.
Connect between the output end of low-pass filter network in envelope detection circuit and the input of AC signal amplifying circuit
It is connected to divider resistance R42, divider resistance R43；Divider resistance R42 one end is connected with the output end of low-pass filter network, the other end
Connect altogether with the resistance R22 in divider resistance R43, amplifying circuit.
Realize two-way decoding all the way in the circuit input end connection energy transmitting terminal of Current amplifier sampling in the present embodiment
Sampling resistor R57, transmitting coil L1, dual decoding electricity are provided with full-bridge circuit or half-bridge circuit, full-bridge circuit or half-bridge circuit
Current amplifier obtains the energy signal at L1, and current signal is obtained at resistance R57.
One-level comparison circuit includes low-pass network, operational amplifier U12B, positive feedback resistor R20；The low-pass network by
R19, electric capacity C24 are formed, and positive feedback resistor is connected between the in-phase input end and output end of the operational amplifier U12B
R20, the output end of the low-pass network are connected with operational amplifier U12B inverting input, the output end and fortune of low-pass network
Resistance R18 is connected between calculation amplifier U12B normal phase input end, operational amplifier U12B output end is connected with resistance
R24；R18 mainly makes the just anti-phase sending-end impedances of U12B consistent in the present embodiment, and R24 is sent into MCU after improving signal impedance
。
The output end of operational amplifier U12A in signal amplifying circuit and the resistance R18 of one-level comparison circuit and low pass net
The input of network is connected.
Due to R19, C24 composition low-pass networks, R20 is positive feedback resistor, they and U12B composition one-level comparison circuits, one
Level comparison circuit carries out data signal I reduction to AC signal.
Current signal amplifier circuit includes filter circuit, wherein operational amplifier U12C, filtered electrical routing resistance R60, electricity
Hold C34 to be formed, the output end of filter circuit is connected with operational amplifier U12C normal phase input end, and operational amplifier U12C's is anti-
Phase input is connected with resistance R62, and operational amplifier U12C output end is by resistance R66 connection control unit MCU, in computing
Resistance R63 is connected between amplifier U12C inverting input and resistance R66.R62, R63 connect in the present embodiment, to anti-
U12C negative terminals are sent into after feedback signal partial pressure, R66 is sent into MCU after improving signal impedance.
The electric current obtained at sampling resistor R57 passes through R60, after C34 filtering, into operational amplifier U12C, according to putting
After big multiple calculation formula draws amplification 1+R63/R62, send MCU to carry out AD samplings through R66 all the way, send late-class circuit to carry out all the way
Decoding obtains data signal II.
Two level comparison circuit includes normal phase input end low-pass network, inverting input low-pass network, operational amplifier U12D,
Normal phase input end low-pass network is formed by resistance R21, electric capacity C26, and inverting input low-pass network is by resistance R23, electric capacity C25 shapes
Into the output end of normal phase input end low-pass network is connected with operational amplifier U12D normal phase input end, inverting input low pass
The output end of network is connected with operational amplifier U12D inverting input；Operational amplifier U12D output end is connected with resistance
R25；The output end of operational amplifier U12D in the current signal amplifier circuit and the normal phase input end of two level comparison circuit
Input, the input of inverting input low-pass network of low-pass network connect altogether.
By resistance R21, electric capacity C26 composition positive input low-pass networks, resistance R23, electric capacity C25 composition negative input
Low-pass network, with operational amplifier U12D composition two level comparison circuits, the numeral being superimposed upon on current signal is disturbed, passed through for they
Can be reduced after two level comparison circuit, can by adjusting the bandwidth of this normal phase input end low-pass network, inverting input low-pass network,
To reconcile the sensitivity of code.
In dual decoding current amplification circuit provided by the invention, two-way decoding Current amplifier all the way, its operation principle are realized
It is:
Circuit of the connection with single LM324 between full-bridge circuit or half-bridge circuit and MCU in energy transmitting terminal, to energy
Signal in transmitting terminal realizes that Current amplifier samples all the way for two-way decoding, on the basis of the claims, the circuit solution
Signal is analysed, the signal after parsing is supplied to the MCU in energy transmitting terminal；The signal is two paths of signals, and signal comes from all the way
Transmitting coil L1 ac voltage signal is superimposed upon, another way signal is from the current signal by sampling resistor R57.
Circuit input end receives two paths of signals, and signal is from the ac voltage signal for being superimposed upon transmitting coil L1 all the way, i.e.,
The signal all the way of input is located between transmitting coil L1 and resonant capacitance C3 tie point, obtains and exchanges through envelope detection circuit
Voltage signal, the AC signal enter after AC signal amplifying circuit is amplified comparison circuit reduced after numeral
Signal I, the decoding effort to signal all the way is completed, obtained data signal I is connected to MCU.
The signal obtained on transmitting coil L1 is decoded, detector diode D6 forms one with low-pass filter network
Envelope detection circuit, the ac voltage signal being superimposed upon on transmitting coil L1 is extracted, detect low frequency communication signal, now
The low frequency communication signal of acquisition is weaker, is compared after AC signal amplifying circuit, then by one-level comparison circuit, also
It is primary into data signal I.
Another way signal from the current signal by sampling resistor R57, i.e., the another way signal of input be located at R57 with
SW2 tie point, the road is superimposed upon the data signal on current signal and passed through after current signal amplifier circuit, all the way as electricity
Stream signal send and AD samplings is carried out in MCU, and another way passes through two level comparison circuit again, reduction generation data signal II, completes to another
The decoding effort of signal all the way, obtained data signal I is connected to MCU.
LM324 family devices carry the four-operational amplifier of very differential input, have real Differential Input.With single supply
The standard operational amplifier of application scenario is compared, and they have some remarkable advantages.Four amplifier can work low to 3.0 volts
Or it is high under 32 volts of power supply, quiescent current is 1/5th of MC1741 quiescent current.Common-mode input range includes negative
Power supply, thus eliminate the necessity that external bias element is used in many application scenarios.
Embodiment 2
The principle of dual decoding current amplification circuit is transmitted with embodiment 1 with signal in the present embodiment, is differed only in, current limliting electricity
Resistance R48 is connected by detector diode D6 with the input of the energy transmitting terminal of low-pass filter network.
Embodiment 3
The principle of dual decoding current amplification circuit is transmitted with embodiment 1 with signal in the present embodiment, is differed only in, described one
Comparator is respectively adopted in operational amplifier U12B, the operational amplifier U12D in two level comparison circuit in level comparison circuit
Comparator1, comparator comparator2.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment includes
One independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should incite somebody to action
Specification is as an entirety, and the technical solutions in the various embodiments may also be suitably combined, and forming those skilled in the art can
With the other embodiment of understanding.
Claims (10)
1. single LM324 realizes that the circuit of sampling is amplified in two-way decoding all the way, it is characterised in that：The input difference of the circuit
It is connected with the transmitting coil L1 and sampling resistor R57 of energy transmitting terminal, the output end of circuit is connected with the MCU of energy transmitting terminal,
Single LM324 in the circuit containing envelope detected circuit, with four road discharge circuits, four road discharge circuits are respectively to exchange
Signal amplification circuit, one-level comparison circuit, current signal amplifier circuit, two level comparison circuit, wherein, AC signal amplifying circuit
It is connected between transmitting coil L1 by envelope detected circuit, passes through comparison circuit phase between AC signal amplifying circuit and MCU
Even；The input of current signal amplifier circuit is connected with sampling resistor R57, and the output end of current signal amplifier circuit is divided into two
Road, directly it is connected all the way with MCU, another way is connected by two level comparison circuit with MCU.
2. single LM324 as claimed in claim 1 realizes that the circuit of sampling is amplified in two-way decoding all the way, it is characterised in that：Institute
Stating envelope detection circuit includes low-pass filter network, the electric capacity C33 for logical exchange,
Wherein, low-pass filter network is formed by resistance R39 and electric capacity C30 is in parallel, output end and the electric capacity C33 of low-pass filter network
It is connected；
The envelope detection circuit also includes detector diode D6, current-limiting resistance R48, and wherein detector diode D6 is located at emission lines
Enclose between L1 and current-limiting resistance R48, the input of current-limiting resistance R48 connection low-pass filter networks；
Or current-limiting resistance R48 is between transmitting coil L1 and detector diode D6, detector diode D6 connection LPF nets
The input of network.
3. single LM324 as claimed in claim 2 realizes that the circuit of sampling is amplified in two-way decoding all the way, it is characterised in that：Institute
Stating AC signal amplifying circuit includes high pass network, ac amplifier circuit, and the high pass network is by electric capacity C36, R46 series connection shape
Into the ac amplifier circuit includes resistance R22, resistance R45, operational amplifier U12A；Resistance R22 and operational amplifier U12A
In-phase input end be connected, high pass network is connected with operational amplifier U12A inverting input, and resistance R45 is located at operation amplifier
Between device U12A inverting input and operational amplifier U12A output end, operational amplifier U12A output end and one-level ratio
It is connected compared with circuit.
4. single LM324 as claimed in claim 3 realizes that the circuit of sampling is amplified in two-way decoding all the way, it is characterised in that：Bag
Partial pressure electricity is connected between the output end of low-pass filter network in network detecting circuit and the input of AC signal amplifying circuit
Hinder R42, divider resistance R43；Divider resistance R42 one end is connected with the output end of low-pass filter network, the other end and divider resistance
Resistance R22 in R43, amplifying circuit connects altogether.
5. single LM324 as claimed in claim 4 realizes that the circuit of sampling is amplified in two-way decoding all the way, it is characterised in that：Institute
Stating one-level comparison circuit includes low-pass network, operational amplifier U12B, positive feedback resistor R20；The low-pass network is by R19, electricity
Hold C24 to be formed, positive feedback resistor R20 is connected between the in-phase input end and output end of the operational amplifier U12B, it is described
The output end of low-pass network is connected with operational amplifier U12B inverting input, the output end and operational amplifier of low-pass network
The resistance R18 of the adjustment just anti-phase sending-end impedances of U12B is connected between U12B normal phase input end, operational amplifier U12B's
Output end connects the resistance R24 for being improved signal impedance；The output end of operational amplifier U12A in the signal amplification circuit
It is connected with the resistance R18 of one-level comparison circuit and the input of low-pass network, the output end of one-level comparison circuit is via resistance R24
It is connected to MCU.
6. single LM324 as claimed in claim 1 realizes that the circuit of sampling is amplified in two-way decoding all the way, it is characterised in that：Institute
Stating current signal amplifier circuit includes filter circuit, wherein operational amplifier U12C, filtered electrical routing resistance R60, electric capacity C34 shapes
Into the input of filter circuit is connected with sampling resistor R57, and the output end and operational amplifier U12C positive of filter circuit are defeated
Enter end to be connected, operational amplifier U12C inverting input is connected with divider resistance R62, and operational amplifier U12C output end is led to
The MCU crossed in resistance R66 connection energy transmitting terminals, connected between operational amplifier U12C inverting input and resistance R66
There is divider resistance R63.
7. single LM324 as claimed in claim 6 realizes that the circuit of sampling is amplified in two-way decoding all the way, it is characterised in that：Institute
Stating two level comparison circuit includes normal phase input end low-pass network, inverting input low-pass network, operational amplifier U12D, and positive is defeated
Enter to hold low-pass network to be formed by resistance R21, electric capacity C26, inverting input low-pass network is formed by resistance R23, electric capacity C25, just
The output end of phase input low-pass network is connected with operational amplifier U12D normal phase input end, inverting input low-pass network
Output end is connected with operational amplifier U12D inverting input；Operational amplifier U12D output end is connected with resistance R25；Institute
State the output end of the operational amplifier U12D in current signal amplifier circuit and the normal phase input end low pass net of two level comparison circuit
Input, the input of inverting input low-pass network of network connect altogether.
8. the single LM324 as described in claim 5 or 7 realizes that the circuit of sampling is amplified in two-way decoding all the way, it is characterised in that：
The energy transmitting terminal is the full-bridge circuit or half-bridge circuit for being provided with transmitting coil L1 and sampling resistor R57, the one-level ratio
Compared with the operational amplifier U12B in circuit, the operational amplifier U12D in two level comparison circuit be respectively adopted comparator1,
comparator2。
9. single LM324 realizes the two-way decoding method that Current amplifier samples all the way, it is characterised in that：
Circuit of the connection with single LM324 between full-bridge circuit or half-bridge circuit and MCU in energy transmitting terminal, to energy
Signal in transmitting terminal realizes that Current amplifier samples all the way for two-way decoding, on the basis of the claims, the circuit solution
Signal is analysed, the signal after parsing is supplied to the MCU in energy transmitting terminal；The signal is divided into two paths of signals, and signal comes all the way
From the ac voltage signal for being superimposed upon transmitting coil L1, another way signal is from the current signal by sampling resistor R57.
10. single LM324 as claimed in claim 9 realizes the two-way decoding method that Current amplifier samples all the way, its feature exists
In：
All the way the decoding process of signal be envelope detection circuit obtains ac voltage signal at transmitting coil 1, after through exchange
Signal amplification circuit enters the data signal I after one-level comparison circuit is reduced after being amplified, complete to signal all the way
Decoding effort, obtained data signal I is connected to MCU；
The decoding process of another way signal is that the data signal being superimposed upon on current signal is passed through after current signal amplifier circuit,
Pass through two level comparison circuit again, reduction generation data signal II, complete the decoding effort to another way signal, the numeral that will be obtained
Signal I is connected to MCU；
It is that the numeral being superimposed upon on current signal is believed for Current amplifier sampling process in the decoding process of another way signal
Number by after current signal amplifier circuit, current signal being sent and carries out AD samplings in energy transmitting terminal in MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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