CN105049070B - For the up near field communication receiver of implantation medical equipment - Google Patents
For the up near field communication receiver of implantation medical equipment Download PDFInfo
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Abstract
The present invention relates to a kind of up near field communication receiver for implantation medical equipment, including：External coil, wave filter and digital demodulator, wherein, the first signal input part of wave filter is connected with the first end of external coil, and secondary signal input is connected with the second end of external coil and connects public terminal voltage；The signal output part of wave filter is connected with the signal input part of digital demodulator；External coil is used to launch wireless energy supply carrier wave and be coupled to receive the uplink communication carrier wave of coil ex vivo；Wave filter is used to suppress wireless energy supply carrier wave and amplifies uplink communication carrier wave；Digital demodulator, for being demodulated to obtain the data of transmission to uplink communication carrier wave.The embodiment of the present invention is suitable for near-field communication, and high input impedance, strong antijamming capability receive sensitive height.
Description
Technical field
The present invention relates to intelligent implantation medical equipment, more particularly to a kind of up near field for implantation medical equipment
Communication control processor.
Background technology
Intelligent implantation medical equipment typically has two class functions of bio-sensing and biological excitation.Bio-sensing is for examining
Biology character information is surveyed, for example, gathers brain electric nerve signal；Biology excitation is for adjusting biology character, for example, to offset heart flesh
Meat is irregular to tremble.In order to realize above-mentioned two classes function, implantation medical equipment generally includes external device and implantation human body
In-vivo device constitute.Wherein, external device provides energy and adjusts therapeutic state, including energy supply, near-field communication and control are single
The parts such as unit；In-vivo device is used to realize sensing and encourages, including capacitation, near-field communication, sensor, driver and control unit
Deng part.
Be referred to as near-field communication when communication distance is less than ten times of carrier wavelength, different from far-field communication, electromagnetic field no longer with
Radiate and communication is realized in the form of coupling.For in the near-field communication of implantation medical equipment, the body that in-vivo device is gathered
Levying data (data to be sent) is real-time monitoring sign data and adjusts the important evidence of therapeutic state according to this, therefore, it is how real
When efficiently by data is activation to be sent be in vitro be currently needed for solve technical problem.
In the prior art, it is most for implantation medical equipment using load modulation system, by changing people's in-vivo device
It is middle to obtain the size that coil connects load, change the impedance variations of inducting of energy supply coil in external device, so as to realize coil
The changes in amplitude of middle energy supply carrier wave, realizes uplink communication.The method realizes that circuit is relatively easy and easily concentrates on implanted
In system.The uplink communication method for loading modulation needs the coil of inside and outside to have larger and more stable coupled system, and
And need energy supply in vitro coil to generate larger load impedance to change, (be more than to produce enough amplitude modulation(PAM)s to change
2%) noise and interference are overcome, so as to realize external device and in-vivo device reliable communication.However, the capacitation coil for implanting
Size can not be too big so that, and the coupling of capacitation coil can be made during physical activity with the coupled system of energy supply coil less
Coefficient is unstable, causes load impedance to change the stability that can influence in-vivo device energy supply, while reducing the effect of wireless energy supply
Rate.Also technical literature realizes energy supply and uplink and downlink communication respectively by setting multipair induction coil, and the program can improve logical
Influence and acquisition wider telecommunications band of the letter circuit to energy supply efficiency.
Above the near-field communication scheme of multi-coil scheme and multiplexing coil is required for a kind of low noise and resists strongly disturbing
Receiver, the receiver receives the communication carrier sensed from external coil.General receiver is for remote in the prior art
Field communicates and designs, such as superhet, after receiving signal through high-frequency amplifier amplification from antenna, after frequency mixer is to amplification
Signal and local oscillated signal carry out frequency conversion and obtain intermediate-freuqncy signal, then amplify through intermediate frequency, detection and low frequency are exported after amplifying.But
It is that general receiver can not meet up near-field communication to input noise, anti-interference and receiving sensitivity requirement.
The content of the invention
One of purpose of the invention is to provide a kind of up near-field communication for implantation medical equipment to receive
Machine, to solve the technical problem that general receiver in the prior art is unsatisfactory for up near-field communication demand.
A kind of up near field communication receiver for implantation medical equipment is the embodiment of the invention provides, including：Body
Exterior loop, wave filter and digital demodulator, wherein,
First signal input part of the wave filter is connected with the first end of the external coil, secondary signal input with
Second end of the external coil connects and connects public terminal voltage；The signal output part of the wave filter and the digital demodulation
The signal input part connection of device；
The external coil, the uplink communication for launching wireless energy supply carrier wave be coupled to receive coil ex vivo is carried
Ripple；
The wave filter, for suppressing the wireless energy supply carrier wave and amplifying the uplink communication carrier wave；
The digital demodulator, for being demodulated to obtain the data of transmission to the uplink communication carrier wave.
Alternatively, the wave filter includes：Prime partial pressure unit, low noise pre-amplifier unit, first order LPF list
Unit, first order high pass filter unit, plus and blowup unit, second level low-pass filter unit, second level high pass filter unit and
Driver element, wherein,
First signal input part of the prime partial pressure unit connects the first input end of the wave filter, the preceding fraction
Press the second input of the secondary signal input connection wave filter of unit, the signal output part of the prime partial pressure unit
Signal input part with the low noise pre-amplifier unit is connected；The signal input part of the first order low-pass filter unit and institute
State the signal output part connection of low noise pre-amplifier unit, the signal output part of the first order low-pass filter unit and described the
The signal input part connection of one-level high pass filter unit；The signal input part of the plus and blowup unit is high with the first order
The signal output part connection of pass filtering unit, the signal output part of the plus and blowup unit and the second level LPF
The signal input part connection of unit；The signal input part of the second level high pass filter unit and the second level LPF list
The signal output part connection of unit, the signal output part of the second level high pass filter unit and the signal input of the driver element
End connection；The signal output part of the driver element connects the signal output part of the wave filter.
Alternatively, the prime partial pressure unit includes：First resistor and the first electric capacity, wherein, the of the first resistor
One end is connected with the first signal input part of the prime partial pressure unit, the second end of the first resistor and first electric capacity
First end connection；Second end of first electric capacity connects public terminal voltage.
Alternatively, the input impedance of the prime partial pressure unit is more than or equal to 10K Europe.
Alternatively, the low noise pre-amplifier unit includes：Second resistance, 3rd resistor and the first operational amplifier, its
In, the normal phase input end of first operational amplifier is connected to the second end of first resistor, and inverting input is by described
Two resistance connect public terminal voltage；The 3rd resistor first end connects the output end of first operational amplifier, the second end
Connect the inverting input of first operational amplifier.
Alternatively, the first order low-pass filter unit includes：4th resistance, the 5th resistance, the second electric capacity, the 3rd electric capacity
With the second operational amplifier, wherein,
The first end of the 4th resistance is connected with the output end of the first operational amplifier, the second end of the 4th resistance
First end with the 5th resistance is connected；
The normal phase input end of second operational amplifier is connected with the second end of the 5th resistance, and by described
The public terminal voltage of three capacitance connections；
The first end of second electric capacity is connected with the first end of the 5th resistance, the second end of second electric capacity with
The output end connection of second operational amplifier；
The inverting input of second operational amplifier is connected with the output end of the second operational amplifier；
The second level low-pass filter unit includes：9th resistance, the tenth resistance, the 5th electric capacity, the 6th electric capacity and the 4th
Operational amplifier, wherein,
The first end of the 9th resistance is connected with the output end of the 3rd operational amplifier, the second end of the 9th resistance
First end with the tenth resistance is connected；
The normal phase input end of the four-operational amplifier is connected with the second end of the tenth resistance, and by described
The public terminal voltage of six capacitance connections；
The first end of the 5th electric capacity is connected with the first end of the tenth resistance, the second end of the 5th electric capacity with
The output end connection of the four-operational amplifier；
The inverting input of the four-operational amplifier is connected with the output end of four-operational amplifier.
Alternatively, the first order high pass filter unit includes：4th electric capacity and the 6th resistance, wherein the 4th electric capacity
First end be connected with the output end of the second operational amplifier, the second end of the 4th electric capacity is with the 3rd operational amplifier just
Phase input is connected；Second end of the 4th electric capacity connects public terminal voltage by the 6th resistance.
Alternatively, the plus and blowup unit includes the 7th resistance, the 8th resistance and the 3rd operational amplifier, wherein,
The inverting input of the 3rd operational amplifier connects public terminal voltage by the 7th resistance；
The first end of the 8th resistance connects the inverting input of the 3rd operational amplifier, and the connection of the second end is described
The output end of the 3rd operational amplifier.
Alternatively, the second level high pass filter unit includes：7th electric capacity, the 11st resistance and the 12nd resistance, its
In,
The first end connection power supply of the 11st resistance, the second end is via the 12nd resistance connection common port electricity
Pressure；
The first end of the 7th electric capacity is connected with the output end of four-operational amplifier, and the second end is connected to the described tenth
At one resistance and the tie point of the 12nd resistance.
Alternatively, the driver element includes the 13rd resistance~the 15th resistance and the 5th operational amplifier, wherein,
The normal phase input end of the 5th operational amplifier connects the second end connection of the 7th electric capacity, inverting input via
13rd resistance connects public terminal voltage；The first end of the 14th resistance connects the anti-of the 5th operational amplifier
Phase input, the second end connects the output end of the 5th operational amplifier；
The first end of the 15th resistance is connected with the output end of the 5th operational amplifier, the second end and the filter
The signal output part connection of ripple device.
Up near field communication receiver provided in an embodiment of the present invention is applied to near-field communication of the distance less than 70mm, can be with
Suppress wireless energy supply signal, uplink communication carrier wave is amplified in selection, with high input impedance, receiving sensitivity, anti-strong jamming, low mistake
The advantage of code check, preferably meets the demand that implantation medical equipment is received to near-field communication.
Brief description of the drawings
The features and advantages of the present invention can be more clearly understood from by reference to accompanying drawing, accompanying drawing is schematical without that should manage
Solution is to carry out any limitation to the present invention, in the accompanying drawings：
Fig. 1 is a kind of up near field communication receiver structure for implantation medical equipment provided in an embodiment of the present invention
Schematic diagram；
Fig. 2 is Fig. 1 filter circuit schematic diagrames.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the invention is described in further detail.Hereinafter implement
Example is not limited to the scope of the present invention for illustrating the present invention.
A kind of up near field communication receiver for implantation medical equipment is the embodiment of the invention provides, such as Fig. 1 institutes
Show, including：External coil 10, wave filter 20 and digital demodulator 30, wherein,
First signal input part of wave filter 20 is connected with the first end 11 of external coil 10, secondary signal input and body
Second end 12 of exterior loop 10 connects and connects public terminal voltage GND；The signal output part of wave filter 20 and digital demodulator 30
Signal input part connection；
External coil 10 is up logical with the data comprising transmission for coupling the wireless energy supply carrier wave of coil ex vivo
Letter carrier wave；
Wave filter 20, for suppressing wireless energy supply carrier wave and amplifying uplink communication carrier wave；
Digital demodulator 30, for being demodulated to obtain the data of transmission to uplink communication carrier wave.
Up near field communication receiver provided in an embodiment of the present invention is applied to near-field communication of the distance less than 70mm, can be with
Suppress wireless energy supply signal, uplink communication carrier wave is amplified in selection, with high input impedance, receiving sensitivity, anti-strong jamming, low mistake
The advantage of code check.
It will be appreciated that in the embodiment of the present invention, external coil 10 had both been used for wireless with internal coil (not shown)
Energy supply is used to transmit uplink communication carrier wave again, realizes the multiplexing of external coil.
In practical application, except also there is powerful wireless confession comprising faint uplink communication carrier signal in external coil
Energy carrier-in-interference, is to detect faint uplink communication carrier signal, it is necessary to suppressing wireless energy supply carrier-in-interference simultaneously
Magnification at high multiple uplink communication carrier wave.Therefore, up near field communication receiver provided in an embodiment of the present invention is additionally provided with wave filter
20.The wave filter 20 is set to the active band logical of the low noise high input impedance that passband central frequency is uplink communication carrier frequency
Wave filter.As shown in Fig. 2 the wave filter 20 includes：Prime partial pressure unit 100, the low noise pre-amplifier unit 200, first order are low
Pass filtering unit 300, first order high pass filter unit 400, plus and blowup unit 500, second level low-pass filter unit 600,
Second level high pass filter unit 700 and driver element 800, wherein, the first signal input part connection filter of prime partial pressure unit 100
The first input end of ripple device, the secondary signal input of prime partial pressure unit 100 connects the second input of wave filter, preceding fraction
The signal output part of unit 100 is pressed to be connected with the signal input part of low noise pre-amplifier unit；First order low-pass filter unit 300
Signal input part be connected with the signal output part of low noise pre-amplifier unit 200, the signal of first order low-pass filter unit 300
Output end is connected with the signal input part of first order high pass filter unit 400；The signal input part of plus and blowup unit 500 with
The signal output part connection of first order high pass filter unit 400, the signal output part of plus and blowup unit 500 is low with the second level
The signal input part connection of pass filtering unit 600；The signal input part of second level high pass filter unit 700 and second level low pass filtered
The signal output part connection of ripple unit 600, the signal output part of second level high pass filter unit 700 and the letter of driver element 800
The connection of number input.
As shown in Fig. 2 prime partial pressure unit 100 includes：First resistor R1 and the first electric capacity C1, wherein, first resistor R1
First end be connected with the first signal input part of prime partial pressure unit 100, second end of first resistor R1 and the first electric capacity C1
First end connection；The public terminal voltage of second capacitance connection of the first electric capacity C1.The resistance of first resistor R1 is higher, the first electric capacity
The capacitance of C1 is relatively low, such that it is able to form larger input impedance.Because wireless energy supply circuit can constitute high with external coil
The quality factor of resonant network will not be just reduced during the access in parallel of the resonant network of quality factor, only high impedance.More preferably,
The input impedance of the prime partial pressure unit 100 is more than or equal to 100K ohm, so that the not shadow when realizing being multiplexed external coil
Ring the efficiency of wireless energy supply.Prime partial pressure unit 100 provided in an embodiment of the present invention is also had passive using resistance capacitance partial pressure
LPF function, the decay for having every ten frequencys multiplication of 20dB to High-frequency Interference can put to the High-frequency Interference of wireless energy supply carrier wave
Pre- suppression before big, and has lower thermal noise with comparing under the conditions of partial pressure networking with input impedance in the prior art, and
Further suppress the High-frequency Interference of big signal.Because the amplifying circuit of rear class has effect to the input thermal noise of potential-divider network, also
It is to say that input thermal noise is topmost noise source in filter output noise, the present invention can be with by setting prime partial pressure unit
Thermal noise is effectively reduced so as to improve the signal to noise ratio of filter output signal.
As shown in Fig. 2 low noise pre-amplifier unit 200 provided in an embodiment of the present invention includes：Second resistance R2, the 3rd electricity
Resistance R3 and the first operational amplifier K1, wherein, the normal phase input end of the first operational amplifier K1 is connected to the of first resistor R1
Two ends, inverting input connects public terminal voltage GND by second resistance R2；3rd resistor R3 first ends connect the first computing and put
The output end of big device K1, the second end connects the inverting input of the first operational amplifier K1.Low noise provided in an embodiment of the present invention
Sound pre-amplifier unit 200 is the positive amplifying circuit of low multiplication factor, and multiplication factor is unsuitable too high.Because low noise is put in advance
The internal noise of big unit 200 is the second main source of filter output noise, so needing to use in the embodiment of the present invention
The feedback resistance of low noise operational amplifier and low resistance (being less than 500 Europe) is reducing the inside of low noise pre-amplifier unit 200
Noise.More preferably, the first operational amplifier K1 uses single operational amplifier chip of low noise.By low in the embodiment of the present invention
After noise pre-amplifier unit 200 carries out pre-amplification to uplink communication carrier wave so that subsequent conditioning circuit to the noise of operational amplifier and
Input impedance requirement is no longer harsh, thus subsequent conditioning circuit operational amplifier can using the operational amplifier chip of double computings,
Such that it is able to reduce the size and cost of circuit board.
As shown in Fig. 2 first order low-pass filter unit 300 provided in an embodiment of the present invention includes：4th resistance R4, the 5th
Resistance R5, the second electric capacity C2, the 3rd electric capacity C3 and the second operational amplifier K2, wherein, the first end and first of the 4th resistance R4
The output end connection of operational amplifier K1, second end of the 4th resistance R4 is connected with the first end of the 5th resistance R5；Second computing
The normal phase input end of amplifier K2 is connected with second end of the 5th resistance R5, and connects public terminal voltage by the 3rd electric capacity C3
GND, the inverting input of the second operational amplifier K2 connects the output end of second operational amplifier K2；The of second electric capacity C2
One end is connected with the first end of the 5th resistance R5, and second end of the second electric capacity C2 connects with the output end of the second operational amplifier K2
Connect.First order low-pass filter unit 300 provided in an embodiment of the present invention uses Sallen-Key second order active low pass circuits, and
Cut-off frequency is less times greater than on (it is 100KHz that cut-off frequency is used in example, and uplink communication carrier frequency is 62.5KHz) near field
Row communication carrier frequency is so as to suppress wireless energy supply carrier-in-interference.In order to take into account to the rejection ability of wireless energy supply carrier-in-interference and
The stability of integrated circuit, unsuitable too low or too high, the practical application of quality factor of the first order low-pass filter unit 300
In, the quality factor of the first order low-pass filter unit 300 are more than 1.
As shown in Fig. 2 first order high pass filter unit 400 provided in an embodiment of the present invention includes：4th electric capacity C4 and
Six resistance R6, wherein the first end of the 4th electric capacity C4 is connected with the output end of the second operational amplifier K2, the of the 4th electric capacity C4
Two ends are connected with the normal phase input end of the 3rd operational amplifier K3；Second end of the 4th electric capacity C4 connects public by the 6th resistance R6
Common terminal voltage GND.The first order high pass filter unit 400 constitutes passive filter circuit, and cutoff frequency using resistance and electric capacity
Rate is less than near field uplink communication carrier frequency, to filter in the output signal of prime partial pressure unit 100 direct current offset and suppress pink colour
Noise.
As shown in Fig. 2 plus and blowup unit 500 provided in an embodiment of the present invention includes the 7th resistance R7, the 8th resistance
R8 and the 3rd operational amplifier K3, wherein, the normal phase input end of the 3rd operational amplifier K3 and second end of the 4th electric capacity C4 connect
Connect, inverting input connects public terminal voltage GND by the 7th resistance R7；The first end of the 8th resistance R8 connects the 3rd computing and puts
The inverting input of big device K3, the second end connects the output end of the 3rd operational amplifier K3.The plus and blowup unit 500 is used
The operational amplifier of high-bandwidth high-gain constitutes positive amplifying circuit, for entering to the output signal of the first high pass filter unit 400
Row Linear Amplifer, to produce magnification at high multiple signal, so that there is provided the main gain near field uplink communication carrier wave, but also need
Take into account and avoid the occurrence of distortion distortion, therefore gain is unsuitable too high.
As shown in Fig. 2 the second level low-pass filter unit 600 provided in the embodiment of the present invention includes：9th resistance R9,
Ten resistance R10, the 5th electric capacity C5, the 6th electric capacity C6 and four-operational amplifier K4, wherein, the first end of the 9th resistance R9 and the
The output end connection of three operational amplifier K3, second end of the 9th resistance R9 is connected with the first end of the tenth resistance R10；4th fortune
The normal phase input end for calculating amplifier K4 is connected with second end of the tenth resistance R10, and by the capacitance connection common ports of C6 the 6th electricity
Pressure GND, the inverting input of four-operational amplifier K4 is connected with the output end of four-operational amplifier；The of 5th electric capacity C5
One end is connected with the first end of the tenth resistance R10, and second end of the 5th electric capacity C5 connects with the output end of four-operational amplifier K4
Connect.To simplify circuit design, the second level low-pass filter unit 600 uses identical with first order low-pass filter unit 300
Sallen-Key second order active low pass circuits, and cut-off frequency 100KHz is less times greater than near field uplink communication carrier frequency
62.5KHz is so as to suppress the wireless energy supply carrier-in-interference that frequency is 2MHz.In order to take into account the suppression to wireless energy supply carrier-in-interference
The stability of ability and integrated circuit, the quality factor of the second level low-pass filter unit 600 are unsuitable too low or too high, actual
In, the quality factor of the second level low-pass filter unit 600 are more than 1.
As shown in Fig. 2 the second level high pass filter unit 700 provided in the embodiment of the present invention includes：7th electric capacity C7,
11 resistance R11 and the 12nd resistance R12, wherein, the first end of the 11st resistance R11 connection power supply VCC, the second end is via the
The 2 public terminal voltage GND of connection of 12 resistance；The first end of the 7th electric capacity C7 connects with the output end of four-operational amplifier K4
Connect, the second end is connected at the tie point of the 11st resistance R11 and the 12nd resistance R12.The second level high pass filter unit 700
Passive filter circuit is constituted using resistance and electric capacity, and cut-off frequency is less than near field uplink communication carrier frequency, to filter height
Direct current offset and suppression pink colour noise in the output signal of multi-gain amplification unit 500.Because the output end of wave filter 20 connects number
The input voltage range of the input of word demodulator 30 is 0V and supply voltage 3.3V, and the second level provided in an embodiment of the present invention is high
Pass filtering unit 700 also increases the direct current biasing for being provided with the 11st resistance R11 and the 12nd resistance R12 compositions, will filtering
The balanced voltage of the AC signal in the output signal of device 20 is lifted to 1/2nd close to supply voltage.
As shown in Fig. 2 in the embodiment of the present invention provide driver element 800 include the 13rd resistance~the 15th resistance and
5th operational amplifier, wherein, the normal phase input end of the 5th operational amplifier K5 connects the second end connection of the 7th electric capacity C7, instead
Phase input connects public terminal voltage GND via the 13rd resistance R13；The first end of the 14th resistance R14 connects the 5th computing
The inverting input of amplifier K5, the second end connects the output end of the 5th operational amplifier K5；The first end of the 15th resistance R15
Output end with the 5th operational amplifier K5 is connected, and the second end is connected with the signal output part of wave filter 20.The driver element 800
It is the positive amplifying circuit being made up of the operational amplifier of a high bandwidth high pressure Slew Rate, by the small letter of near field uplink communication carrier wave
Number zoom into big signal to meet the input voltage of digital modulator 30 and the demand of impedance matching.
The data that are exported to wave filter 20 of digital demodulator 30 provided in the embodiment of the present invention carry out carrier wave, symbol,
Group synchronization, then coherent demodulation verification is carried out to recover near field uplink communication data and export.Digital demodulator and external controller
Interface has enable signal EN, load data PAYLOAD, effectively indicates VALID, mistake to indicate ERROR, time-out to indicate TIMEOUT.
When enabling signal EN and putting high, receiver is started working, and first judges whether uplink communication carrier wave, carries out carrier wave, symbol successively if having
Number, group synchronization, when synchronized algorithm perform time-out then put superb when indicate TIMEOUT represent overtime warning.All synchronized algorithms are complete
Cheng Hou, makees coherent demodulation and recovers load data, when load data is demodulated using the same frequency for recovering with the docking collection of letters number of phase carrier wave
Correlated results can put mistake high and indicate ERROR to represent demodulation mistake when being less than decision threshold or check bit inspection mistake, work as load
Meeting output loads data are in PAYLOAD when data are completely received and check bit inspection is correct and effectively indicate VALID to be set to height.
Up near field communication receiver provided in an embodiment of the present invention is multiplexed in the test of communication prototype machine with wireless energy supply
External coil simultaneously works simultaneously, at this moment the peak-to-peak value of the 62.5KHz uplink communications on external coil less than 10mV resonant frequency
For the peak-to-peak value of 2MHz wireless energy supply alternating current disturbances is 285V.In exporting the signal to digital modulator after device after filtering
The peak-to-peak value of 62.5KHz uplink communication carrier waves is enlarged into the peak-to-peak of 1.73V and resonant frequency 2MHz wireless energy supply alternating current disturbances
Value is suppressed to 128mV, and Signal to Interference plus Noise Ratio is improved as 16dB from -89dB, improves 105dB.In error rate test, emitter is allowed
Transmission continuously sends given data, and receiver output and given data contrast judge whether to be properly received, and surveys every time
Examination continues 2 hours and the bit error rate is calculated to obtain sufficiently large statistical sample, and wireless energy transfer is also protected always when testing
Hold working condition.When coil separation distance is more than 70mm, there is error code mistake, and the bit error rate with the reduction or increasing of separation distance
Big and reduce or raise, when external coil is 80mm with the separation distance at internal line side, (coefficient of coup now is
0.0025), the bit error rate is 1.0E-4.When separation distance be less than or equal to 70mm when (during 70mm in body exterior loop the coefficient of coup
0.0035), there is no error code mistake in the test of two hours, so its bit error rate is less than 1.0E-7.The embodiment of the present invention is carried
The up near field communication receiver for supplying, by setting wave filter suppression wireless energy supply carrier-in-interference and simultaneously amplifying near field up logical
Letter carrier signal, while reducing the internal noise of wave filter, is not only applicable near field uplink communication, moreover it is possible to anti-strong jamming, can
The signal of output low noise, low error rate.
In the present invention, term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicate or
Imply relative importance.Term " multiple " refers to two or more, unless otherwise clearly restriction.
Although being described in conjunction with the accompanying embodiments of the present invention, those skilled in the art can not depart from this hair
Various modifications and variations are made in the case of bright spirit and scope, such modification and modification are each fallen within by appended claims
Within limited range.
Claims (9)
1. a kind of up near field communication receiver for implantation medical equipment, it is characterised in that including：External coil, filter
Ripple device and digital demodulator, wherein,
First signal input part of the wave filter is connected with the first end of the external coil, secondary signal input with it is described
Second end of external coil connects and connects public terminal voltage；The signal output part of the wave filter and the digital demodulator
Signal input part is connected；
The external coil, for the uplink communication carrier wave for launching wireless energy supply carrier wave be coupled to receive coil ex vivo；
The wave filter, for suppressing the wireless energy supply carrier wave and amplifying the uplink communication carrier wave；
The digital demodulator, for being demodulated to obtain the data of transmission to the uplink communication carrier wave；
The wave filter includes：Prime partial pressure unit, low noise pre-amplifier unit, first order low-pass filter unit, the first order are high
Pass filtering unit, plus and blowup unit, second level low-pass filter unit, second level high pass filter unit and driver element, its
In,
First signal input part of the prime partial pressure unit connects the first input end of the wave filter, the prime partial pressure list
The secondary signal input of unit connects the second input of the wave filter, the signal output part of the prime partial pressure unit and institute
State the signal input part connection of low noise pre-amplifier unit；The signal input part of the first order low-pass filter unit is low with described
The signal output part connection of noise pre-amplifier unit, signal output part and the first order of the first order low-pass filter unit
The signal input part connection of high pass filter unit；The signal input part of the plus and blowup unit is filtered with the first order high pass
The signal output part connection of ripple unit, the signal output part of the plus and blowup unit and the second level low-pass filter unit
Signal input part connection；The signal input part of the second level high pass filter unit and the second level low-pass filter unit
Signal output part is connected, and the signal output part of the second level high pass filter unit connects with the signal input part of the driver element
Connect；The signal output part of the driver element connects the signal output part of the wave filter.
2. up near field communication receiver according to claim 1, it is characterised in that the prime partial pressure unit includes：
First resistor and the first electric capacity, wherein, the first signal input of the first end of the first resistor and the prime partial pressure unit
End connection, the second end of the first resistor is connected with the first end of first electric capacity；Second end of first electric capacity connects
Connect public terminal voltage.
3. up near field communication receiver according to claim 1 and 2, it is characterised in that
The input impedance of the prime partial pressure unit is more than or equal to 10K Europe.
4. up near field communication receiver according to claim 1, it is characterised in that the low noise pre-amplifier unit bag
Include：Second resistance, 3rd resistor and the first operational amplifier, wherein, the normal phase input end connection of first operational amplifier
To the second end of first resistor, inverting input connects public terminal voltage by the second resistance；The 3rd resistor first
The output end of end connection first operational amplifier, the second end connects the inverting input of first operational amplifier.
5. up near field communication receiver according to claim 1, it is characterised in that the first order low-pass filter unit
Including：4th resistance, the 5th resistance, the second electric capacity, the 3rd electric capacity and the second operational amplifier, wherein,
The first end of the 4th resistance is connected with the output end of the first operational amplifier, the second end of the 4th resistance and institute
State the first end connection of the 5th resistance；
The normal phase input end of second operational amplifier is connected with the second end of the 5th resistance, and by the described 3rd electricity
Hold the public terminal voltage of connection；
The first end of second electric capacity is connected with the first end of the 5th resistance, the second end of second electric capacity with it is described
The output end connection of the second operational amplifier；
The inverting input of second operational amplifier is connected with the output end of the second operational amplifier；
The second level low-pass filter unit includes：9th resistance, the tenth resistance, the 5th electric capacity, the 6th electric capacity and the 4th computing
Amplifier, wherein,
The first end of the 9th resistance is connected with the output end of the 3rd operational amplifier, the second end of the 9th resistance and institute
State the first end connection of the tenth resistance；
The normal phase input end of the four-operational amplifier is connected with the second end of the tenth resistance, and by the described 6th electricity
Hold the public terminal voltage of connection；
The first end of the 5th electric capacity is connected with the first end of the tenth resistance, the second end of the 5th electric capacity with it is described
The output end connection of four-operational amplifier；
The inverting input of the four-operational amplifier is connected with the output end of four-operational amplifier.
6. up near field communication receiver according to claim 1, it is characterised in that the first order high pass filter unit
Including：4th electric capacity and the 6th resistance, wherein the first end of the 4th electric capacity is connected with the output end of the second operational amplifier,
Second end of the 4th electric capacity is connected with the normal phase input end of the 3rd operational amplifier；Second end of the 4th electric capacity is passed through
6th resistance connects public terminal voltage.
7. up near field communication receiver according to claim 1, it is characterised in that the plus and blowup unit includes
7th resistance, the 8th resistance and the 3rd operational amplifier, wherein,
The inverting input of the 3rd operational amplifier connects public terminal voltage by the 7th resistance；
The first end of the 8th resistance connects the inverting input of the 3rd operational amplifier, the second end connection the described 3rd
The output end of operational amplifier.
8. up near field communication receiver according to claim 1, it is characterised in that the second level high pass filter unit
Including：7th electric capacity, the 11st resistance and the 12nd resistance, wherein,
The first end connection power supply of the 11st resistance, the second end connects public terminal voltage via the 12nd resistance；
The first end of the 7th electric capacity is connected with the output end of four-operational amplifier, and the second end is connected to the 11st electricity
Resistance with the tie point of the 12nd resistance at.
9. up near field communication receiver according to claim 1, it is characterised in that the driver element includes the 13rd
Resistance~the 15th resistance and the 5th operational amplifier, wherein,
The normal phase input end of the 5th operational amplifier connects the second end connection of the 7th electric capacity, and inverting input is via described
13rd resistance connects public terminal voltage；The first end of the 14th resistance connects the anti-phase defeated of the 5th operational amplifier
Enter end, the second end connects the output end of the 5th operational amplifier；
The first end of the 15th resistance is connected with the output end of the 5th operational amplifier, the second end and the wave filter
Signal output part connection.
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| CN201510446947.XA CN105049070B (en) | 2015-07-27 | 2015-07-27 | For the up near field communication receiver of implantation medical equipment |
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| CN201510446947.XA CN105049070B (en) | 2015-07-27 | 2015-07-27 | For the up near field communication receiver of implantation medical equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102258409A (en) * | 2011-04-20 | 2011-11-30 | 上海交通大学 | Wireless energy and data transmission system for visual prosthesis |
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