CN115865139A - NFC debugging device and electronic equipment - Google Patents
NFC debugging device and electronic equipment Download PDFInfo
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- CN115865139A CN115865139A CN202310142312.5A CN202310142312A CN115865139A CN 115865139 A CN115865139 A CN 115865139A CN 202310142312 A CN202310142312 A CN 202310142312A CN 115865139 A CN115865139 A CN 115865139A
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Abstract
The embodiment of the present disclosure provides an NFC debugging device and electronic equipment, and the NFC debugging device includes: the filter circuit is connected with the NFC chip and used for filtering the wireless radio frequency signal transmitted by the NFC chip; the matching debugging circuit is connected between the filter circuit and the NFC antenna in series and comprises a plurality of magnetic beads and a plurality of capacitors; the maximum impedance value of a plurality of magnetic beads in the matching debugging circuit within a preset frequency and/or the capacitance values of a plurality of capacitors in the matching debugging circuit are/is adjusted so as to adapt to enable the NFC chip to emit at the maximum power and reduce radiation harmonic energy, and radiation interference of NFC on the wireless radio frequency antenna is eliminated. Through the processing scheme disclosed by the invention, under the condition of narrow space of the layout of the electronic equipment, the interference of the NFC chip on the receiving of the wireless radio frequency antenna is reduced, and the receiving sensitivity of the wireless radio frequency antenna is improved.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an NFC debugging device and electronic equipment.
Background
Near Field Communication (NFC) is a short-distance contactless Communication technology, which combines contactless sensing and wireless connection technologies to operate in the 13.56MHz frequency band. Compared with other short-distance wireless communication technologies, the NFC antenna is safer, has shorter reaction time, and can be used for wireless communication technologies for short-distance (less than 0.1 m) secure communication.
Due to the limitation of the space size of the electronic device, the distance between the NFC antenna and other wireless antennas is very short, such as a WIFI antenna or an LTE antenna, and due to the difference of the noise floor level of the NFC chip, the frequency of the high-energy harmonic radiation of the NFC chip may reach several hundred mega even several giga, which causes serious interference to the reception of other wireless radio frequency antennas and affects the reception performance of other wireless radio frequencies.
Disclosure of Invention
In view of this, embodiments of the present disclosure provide an NFC debugging apparatus and an electronic device, which at least partially solve the problems in the prior art.
In a first aspect, an embodiment of the present disclosure provides an NFC debugging apparatus, including:
the filter circuit is connected with the NFC chip and used for filtering the wireless radio frequency signal transmitted by the NFC chip;
the matching debugging circuit is connected between the filter circuit and the NFC antenna in series and comprises a plurality of magnetic beads and a plurality of capacitors;
the maximum impedance value of the magnetic beads in the matching and debugging circuit within a preset frequency and/or the capacitance value of the capacitors in the matching and debugging circuit are adjusted so as to enable the NFC chip to emit at the maximum power and reduce radiation harmonic energy, and radiation interference of NFC on the wireless radio frequency antenna is eliminated.
According to a specific implementation manner of the embodiment of the disclosure, the selection rules of the plurality of magnetic beads are the same; the maximum direct current impedance of the plurality of magnetic beads is less than 1 ohm, and the maximum rated current of the plurality of magnetic beads is greater than the current emitted by the NFC chip; and
when the NFC chip works in a frequency band of 13.56MHz, the impedance value of the magnetic beads at the frequency point within the preset harmonic frequency is close to 0, and the interference intensity at the pre-elimination frequency point is positively correlated with the impedance value.
According to a specific implementation manner of the embodiment of the present disclosure, the matching and debugging circuit includes:
a first end of the load resonance adjusting unit is connected with the filter circuit, a second end of the load resonance adjusting unit is grounded, and a third end of the load resonance adjusting unit is connected with the NFC antenna;
the first magnetic bead is connected between the third end of the load resonance adjusting unit and the NFC antenna in series;
and the second magnetic bead is connected in series between the first magnetic bead and the NFC antenna.
According to a specific implementation manner of the embodiment of the present disclosure, the matching and debugging circuit further includes:
a first end of the capacitor C1 is connected with the third end of the load resonance adjusting unit and the first end of the first magnetic bead, and a second end of the capacitor C1 is grounded;
a first end of the capacitor C2 is connected with both the second end of the first magnetic bead and the first end of the second magnetic bead, and a second end of the capacitor C is grounded;
and a first end of the capacitor C3 is connected with the second end of the second magnetic bead and the NFC antenna, and a second end of the capacitor C3 is grounded.
According to a specific implementation manner of the embodiment of the present disclosure, the matching and debugging circuit includes:
the first end of the first magnetic bead is connected with the filter circuit;
a first end of the second magnetic bead is connected with a second end of the first magnetic bead;
and a first end of the load resonance adjusting unit is connected with a second end of the second magnetic bead, the second end of the load resonance adjusting unit is grounded, and a third end of the load resonance adjusting unit is connected with the NFC antenna.
According to a specific implementation manner of the embodiment of the present disclosure, the matching and debugging circuit further includes:
a capacitor C4, a first end of which is connected to the first end of the first magnetic bead, and a second end of which is grounded;
a first end of the capacitor C5 is connected with both the second end of the first magnetic bead and the first end of the second magnetic bead, and a second end of the capacitor C is grounded;
and a first end of the capacitor C6 is connected with both the second end of the second magnetic bead and the first end of the load resonance adjusting unit, and a second end of the capacitor C is grounded.
According to a specific implementation manner of the embodiment of the present disclosure, the matching and debugging circuit includes:
the first end of the first magnetic bead is connected with the filter circuit;
a first end of the load resonance adjusting unit is connected with a second end of the first magnetic bead, and a second end of the load resonance adjusting unit is grounded;
and a first end of the second magnetic bead is connected with a third end of the load resonance adjusting unit, and a second end of the second magnetic bead is connected with the NFC antenna.
According to a specific implementation manner of the embodiment of the present disclosure, the matching and debugging circuit further includes:
a capacitor C7, a first end of which is connected with the first end of the first magnetic bead, and a second end of which is grounded;
a capacitor C8, a first end of which is connected with the second end of the first magnetic bead, and a second end of which is grounded;
a first end of the capacitor C9 is connected with the third end of the load resonance adjusting unit and the first end of the second magnetic bead, and a second end of the capacitor C9 is grounded;
and a first end of the capacitor C10 is connected with the second end of the second magnetic bead, and a second end of the capacitor C is grounded.
According to a specific implementation manner of the embodiment of the present disclosure, the load resonance adjusting unit includes: the resonant capacitor bank comprises a load capacitor bank and a resonant capacitor bank, wherein a first end of the load capacitor bank is connected with a first end of the resonant capacitor bank, and a second end of the resonant capacitor bank is grounded;
wherein the load capacitance group comprises the first load capacitance and a second load capacitance which are mutually connected in parallel;
the resonant capacitor group comprises a first resonant capacitor and a second resonant capacitor which are connected in parallel.
According to a specific implementation manner of the embodiment of the present disclosure, the filter circuit includes an inductor and a filter capacitor, a first end of the inductor is connected to the NFC chip, a second end of the inductor is connected to the first end of the filter capacitor and the input end of the matching and debugging circuit, and a second end of the filter capacitor is grounded.
In a second aspect, an embodiment of the present disclosure provides an electronic device, including: NFC chip, NFC antenna and as above-mentioned NFC debugging device.
In the NFC debugging device and the electronic device provided in the above embodiments, the NFC debugging device includes a filter circuit and a matching debugging circuit, where the filter circuit is connected to an NFC chip and is configured to filter a radio frequency signal transmitted by the NFC chip; the matching debugging circuit is connected between the filter circuit and the NFC antenna in series and comprises a plurality of magnetic beads and a plurality of capacitors; through adjusting the maximum impedance value of a plurality of magnetic beads in the inside matching and debugging circuit in the frequency of predetermineeing and/or the capacitance value of a plurality of electric capacity in the inside matching and debugging circuit to the increase NFC chip transmitting power reduces the radiation harmonic energy, can eliminate under the little space overall arrangement condition and not changing under the whole space overall arrangement condition the radiation interference of NFC chip to radio frequency antenna improves radio frequency antenna's receiving sensitivity.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;
fig. 2 is a schematic circuit diagram of an NFC debugging apparatus provided in an embodiment of the present application;
fig. 3 is a schematic circuit diagram of an NFC debugging apparatus provided in another embodiment of the present application;
fig. 4 is a schematic circuit diagram of an NFC apparatus according to another embodiment of the present application;
fig. 5 is a schematic circuit diagram of an NFC debugging apparatus provided in another embodiment of the present application;
fig. 6 is a schematic circuit diagram of an NFC debugging apparatus provided in another embodiment of the present application;
fig. 7 is a schematic circuit diagram of an NFC debugging apparatus provided in another embodiment of the present application.
Description of reference numerals: 10. a filter circuit; 20. a match debug circuit; 21. a load resonance adjusting unit; 211. a load capacitance bank; 212. and a resonant capacitor bank.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be further noted that the drawings provided in the following embodiments are only schematic illustrations of the basic concepts of the present disclosure, and the drawings only show the components related to the present disclosure rather than the numbers, shapes and dimensions of the components in actual implementation, and the types, the numbers and the proportions of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
In an NFC debugging apparatus provided in an embodiment of the present application, as shown in fig. 1, the NFC debugging apparatus includes a filter circuit 10 and a matching debugging circuit 20; the filter circuit 10 is connected with the NFC chip and is used for filtering wireless radio frequency signals emitted by the NFC chip; the matching debugging circuit 20 is connected between the filter circuit 10 and the NFC antenna in series and comprises a plurality of magnetic beads and a plurality of capacitors; the maximum impedance value of a plurality of magnetic beads inside the matching and debugging circuit 20 within a preset frequency and/or the capacitance value of a plurality of capacitors inside the matching and debugging circuit are adjusted so as to adapt to enable the NFC chip to emit at maximum power and reduce radiation harmonic energy, and eliminate radiation interference of the NFC chip on the radio frequency antenna.
It should be noted that, when the matching and debugging circuit 20 is disposed between the NFC chip and the filter circuit 10, that is, the matching and debugging are performed on the radio frequency signal transmitted by the NFC chip first, and then multiple harmonic processing is performed, which may increase the radiation value of the radio frequency signal, and may increase the radiation interference of the NFC antenna.
By way of example, the wireless radio frequency antenna may include, but is not limited to, a wireless antenna of WIFI/LTE/BT/433Mhz frequency, or the like. It should be noted that the radio frequency antenna and the NFC antenna are two different antennas, and the NFC antenna is closer to the NFC chip.
In the NFC debugging device provided in the above embodiment, the NFC debugging device includes a filter circuit and a matching debugging circuit, where the filter circuit is connected to the NFC chip and is configured to filter a radio frequency signal transmitted by the NFC chip; the matching debugging circuit is connected between the filter circuit and the NFC antenna in series and comprises a plurality of magnetic beads and a plurality of capacitors; through adjusting the capacitance value that matches the inside a plurality of magnetic beads of debugging circuit and/or match the inside a plurality of electric capacities of debugging circuit in the frequency of predetermineeing makes with the adaptation NFC chip can reduce the radiation harmonic energy with the maximum power transmission, eliminates or reduces NFC disturbs the radiation of radio frequency antenna, under the narrow and small space condition of electronic equipment overall arrangement to reduce the interference of NFC chip to the radio frequency antenna receipt, improve the receiving sensitivity that the radio frequency antenna received.
In one embodiment, as shown in FIG. 2, filter circuit 10 includes an inductor L and a filter capacitor C f The first end of the inductor L is connected with the NFC chip, and the second end of the inductor L is connected with the filter capacitor C f Is connected to the input of the match-debugging circuit 20, and a filter capacitor C f And the second terminal of the filter circuit 10 is grounded, as is well known to those skilled in the art.
As an example, an inductance L and a filter capacitance C f The formed filter circuit 10 may be an EMC low-pass filter circuit, the EMC low-pass filter circuit filters a radio frequency signal emitted by the NFC chip, and may be a second harmonic and a third harmonic, so as to prevent the harmonic from exceeding the standard, facilitate the optimization of the harmonic, and suppress the third harmonic, the fifth harmonic, and the higher harmonic above the fifth harmonic of 13.56MHz, and the filter circuit has a matching formula F = 1/(2 pi √ LC), and the frequency point should be higher than 13.56MHz.
In one embodiment, continuing to refer to FIG. 2, match debug circuitry 20 includes: a first magnetic bead R1, a second magnetic bead R2, and a load resonance adjusting unit 21; specifically, a first end of the load resonance adjusting unit 21 is connected to the filter circuit 10, a second end of the load resonance adjusting unit 21 is grounded, and a third end of the load resonance adjusting unit 21 is connected to the NFC antenna; the first magnetic bead R1 is connected in series between the third end of the load resonance adjusting unit 21 and the NFC antenna; the second magnetic bead R2 is connected in series between the first magnetic bead R1 and the NFC antenna.
Further, in another embodiment, as shown in fig. 3, match debugging circuitry 20 further includes: a capacitor C1, a capacitor C2, and a capacitor C3; specifically, the first end of the capacitor C1 is connected to the third end of the load resonance adjusting unit 21 and the first end of the first magnetic bead R1, and the second end of the capacitor C1 is grounded; the first end of the capacitor C2 is connected with the second end of the first magnetic bead R1 and the first end of the second magnetic bead R2, and the second end of the capacitor C2 is grounded; the first end of the capacitor C3 is connected with the second end of the second magnetic bead R2 and the NFC antenna, and the second end of the capacitor C3 is grounded.
In one embodiment, as shown in FIG. 4, match debug circuitry 20 includes: a first magnetic bead R1, a second magnetic bead R2, and a load resonance adjusting unit 21; specifically, a first end of the first magnetic bead R1 is connected to the filter circuit 10; the first end of the second magnetic bead R2 is connected with the second end of the first magnetic bead R1; the first end of the load resonance adjusting unit 21 is connected with the second end of the second magnetic bead R2, the second end of the load resonance adjusting unit 21 is grounded, and the third end of the load resonance adjusting unit 21 is connected with the NFC antenna.
Further, in another embodiment, as shown in fig. 5, match debugging circuit 20 further includes: a capacitor C4, a capacitor C5, and a capacitor C6; specifically, a first end of the capacitor C4 is connected to a first end of the first magnetic bead R1, and a second end of the capacitor C4 is grounded; the first end of the capacitor C5 is connected with the second end of the first magnetic bead R1 and the first end of the second magnetic bead R2, and the second end of the capacitor C5 is grounded; the first end of the capacitor C6 is connected to the second end of the second magnetic bead R2 and the first end of the load resonance adjusting unit 21, and the second end of the capacitor C6 is grounded.
In one embodiment, as shown in FIG. 6, match debug circuitry 20 includes: a first magnetic bead R1, a second magnetic bead R2, and a load resonance adjusting unit 21; specifically, a first end of the first magnetic bead R1 is connected to the filter circuit 10; a first end of the load resonance adjusting unit 21 is connected with a second end of the first magnetic bead R1, and a second end of the load resonance adjusting unit 21 is grounded; the first end of the second magnetic bead R2 is connected to the third end of the load resonance adjusting unit 21, and the second end of the second magnetic bead R2 is connected to the NFC antenna.
Further, in another embodiment, as shown in fig. 7, match debugging circuitry 20 further includes: a capacitor C7, a capacitor C8, a capacitor C9 and a capacitor C10; specifically, a first end of the capacitor C7 is connected to a first end of the first magnetic bead R1, and a second end of the capacitor C7 is grounded; a first end of the capacitor C8 is connected with a second end of the first magnetic bead R1, and a second end of the capacitor C8 is grounded; a first end of the capacitor C9 is connected with a third end of the load resonance adjusting unit 21 and a first end of the second magnetic bead R2, and a second end of the capacitor C9 is grounded; the first end of the capacitor C10 is connected to the second end of the second magnetic bead R2, and the second end of the capacitor C10 is grounded.
It should be noted that C1, C2, C3 … C9 and C10 function as various L-type T-type Π -type filter circuits formed with magnetic beads, and have better filter effects than magnetic beads alone, and can better eliminate energy of high-frequency harmonic interference.
In one embodiment, the maximum impedance value in a preset frequency can be selected according to actual conditions, the preset frequency is an NFC wireless interference frequency point, and the selection rules of a plurality of magnetic beads are the same; the maximum direct current impedance of the magnetic beads is smaller than 1 ohm, and the maximum rated current of the magnetic beads is larger than the current emitted by the NFC chip.
In one embodiment, when the NFC chip operates in a frequency band of 13.56MHz, impedance values of a plurality of magnetic beads at frequency points within a preset harmonic number are close to 0, an excessively large impedance value may cause loss and attenuation to a signal transmitted by the NFC chip itself, and interference strength at a pre-cancellation frequency point is positively correlated with the impedance value, where if sensitivity interference at the pre-cancellation frequency point is 20db, the impedance value of the magnetic bead is selected so that the interference signal is attenuated by greater than or equal to 20db. The preset harmonic number may be 2 or 3, and the like, and herein, the third harmonic may be selected; for example, the interference of the pre-elimination frequency point is 800Mhz, the impedance value of the magnetic bead is selected to be larger, the interference is converted into heat energy, and therefore the high-frequency interference is reduced or lowered.
It should be noted that the plurality of magnetic beads described above includes the first magnetic bead R1 and the second magnetic bead R2, that is, the type selection rules of the first magnetic bead R1 and the second magnetic bead R2 are the same. The direct current impedance value of the first magnetic bead R1 and the second magnetic bead R2 is 0-1 ohm, the performance influence of the NFC chip on the wireless radio frequency antenna is reduced to the minimum, and even the interference influence is eliminated.
In whole PCB spatial layout, a plurality of magnetic beads should be close to load resonance regulating unit 21 as far as possible and put, and on the one hand, a plurality of magnetic beads can interact with a plurality of electric capacity in the load resonance regulating unit 21, and furthest's reduction NFC is to the interference of radio frequency antenna, and on the other hand also can reduce the PCB board, reduce cost.
In one embodiment, referring to fig. 2 to 7, the load resonance adjusting unit 21 includes: load capacitance group 211 and resonance capacitance group 212, the first end of load capacitance group 211 is connected with the first end of resonance capacitance group 212, the second end of resonance capacitance group 212 is grounded.
Specifically, the load capacitor group 211 includes first load capacitors C connected in parallel to each other x1 And a second load capacitor C x2 (ii) a Resonant capacitor bank 212 includes first resonant capacitors C connected in parallel y1 And a second resonant capacitor C y2 。
By adjusting the first load capacitance C x1 A second load capacitor C x2 A first resonant capacitor C y1 And a second resonant capacitor C y2 Such that the entire antenna path, including the NFC antenna, has a resonant frequency at 13.65mhz, and a 13.65mhz impedance match is located near a 50 ohm impedance.
Further, a first load capacitor C x1 And a second load capacitor C x2 For regulating NFC transmitting load power, a first resonant capacitor C y1 And a second resonant capacitor C y2 For adjusting the resonant frequency when the internal impedance of the NFC chip and the first load capacitance C x1 When the external impedance formed by the second load capacitance Cx2 is consistent, the transmitting power of the NFC chip reaches the highest value; the larger the inductance of the NFC antenna is, the larger the first load capacitance C x1 And a second load capacitor C x2 The smaller the value of (A) is; by increasing C x1 And C x2 The value of (2) can be obtained by using the fact that the Smith impedance circle on the network analyzer is enlarged and the resonance frequency point shifts to a low frequency.
In addition, the value can be adjusted according to the inductance of the NFC antenna, so that the resonant frequency is 13.65Mhz, and a first resonant capacitor C is added y1 And a second resonant capacitor C y2 The smith circle will shrink and the resonance frequency point will shift towards low frequencies. Therefore, the parameter values of the four capacitors can be continuously adjusted in the mode, the problem of high-frequency interference of NFC on the wireless radio frequency antenna is eliminated to the greatest extent, and the sensitivity of the wireless radio frequency antenna is improved.
In an embodiment of the present application, there is also provided an electronic device including an NFC chip, an NFC antenna, and the NFC debugging apparatus as described above.
By way of example, the electronic devices may include various handheld devices, vehicle mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem with wireless communication capabilities, as well as various forms of User Equipment (UE), mobile Stations (MS), terminal devices (Terminal Device), and so forth. For convenience of description, the above-mentioned devices are collectively referred to as electronic devices.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. An NFC commissioning device, comprising:
the filter circuit is connected with the NFC chip and used for filtering the wireless radio frequency signal transmitted by the NFC chip;
the matching debugging circuit is connected between the filter circuit and the NFC antenna in series and comprises a plurality of magnetic beads and a plurality of capacitors;
the maximum impedance value of the plurality of magnetic beads in the matching and debugging circuit within a preset frequency and/or the capacitance value of the plurality of capacitors in the matching and debugging circuit are adjusted so as to adapt to enable the NFC chip to emit at the maximum power and reduce radiation harmonic energy, and eliminate radiation interference of the NFC chip on the wireless radio frequency antenna.
2. The NFC debug device of claim 1,
the selection rules of the magnetic beads are the same;
the maximum direct current impedance of the plurality of magnetic beads is less than 1 ohm, and the maximum rated current of the plurality of magnetic beads is greater than the current emitted by the NFC chip; and
when the NFC chip works in a frequency band of 13.56MHz, the impedance value of the magnetic beads at the frequency point within the preset harmonic frequency is close to 0, and the interference intensity at the pre-elimination frequency point is positively correlated with the impedance value.
3. The NFC debugging device according to claim 1 or 2, wherein the matching debugging circuit comprises:
a first end of the load resonance adjusting unit is connected with the filter circuit, a second end of the load resonance adjusting unit is grounded, and a third end of the load resonance adjusting unit is connected with the NFC antenna;
the first magnetic bead is connected between the third end of the load resonance adjusting unit and the NFC antenna in series;
and the second magnetic bead is connected in series between the first magnetic bead and the NFC antenna.
4. The NFC debug device of claim 3, wherein the match debug circuitry further comprises:
a first end of the capacitor C1 is connected with the third end of the load resonance adjusting unit and the first end of the first magnetic bead, and a second end of the capacitor C1 is grounded;
a first end of the capacitor C2 is connected with both the second end of the first magnetic bead and the first end of the second magnetic bead, and a second end of the capacitor C is grounded;
and a first end of the capacitor C3 is connected with the second end of the second magnetic bead and the NFC antenna, and a second end of the capacitor C is grounded.
5. The NFC debugging device according to claim 1 or 2, wherein the matching debugging circuit comprises:
the first end of the first magnetic bead is connected with the filter circuit;
a first end of the second magnetic bead is connected with a second end of the first magnetic bead;
and a first end of the load resonance adjusting unit is connected with a second end of the second magnetic bead, the second end of the load resonance adjusting unit is grounded, and a third end of the load resonance adjusting unit is connected with the NFC antenna.
6. The NFC debug device of claim 5, wherein the match debug circuitry further comprises:
a capacitor C4, a first end of which is connected with the first end of the first magnetic bead, and a second end of which is grounded;
a first end of the capacitor C5 is connected with both the second end of the first magnetic bead and the first end of the second magnetic bead, and a second end of the capacitor C is grounded;
and a first end of the capacitor C6 is connected with both the second end of the second magnetic bead and the first end of the load resonance adjusting unit, and a second end of the capacitor C is grounded.
7. The NFC commissioning device of claim 1 or 2, wherein the match commissioning circuit comprises:
the first end of the first magnetic bead is connected with the filter circuit;
a first end of the load resonance adjusting unit is connected with a second end of the first magnetic bead, and the second end of the load resonance adjusting unit is grounded;
and a first end of the second magnetic bead is connected with a third end of the load resonance adjusting unit, and a second end of the second magnetic bead is connected with the NFC antenna.
8. The NFC debug device of claim 7, wherein the match debug circuitry further comprises:
a capacitor C7, a first end of which is connected with the first end of the first magnetic bead, and a second end of which is grounded;
a capacitor C8, a first end of which is connected to the second end of the first magnetic bead, and a second end of which is grounded;
a first end of the capacitor C9 is connected with the third end of the load resonance adjusting unit and the first end of the second magnetic bead, and a second end of the capacitor C9 is grounded;
and a first end of the capacitor C10 is connected with the second end of the second magnetic bead, and a second end of the capacitor C is grounded.
9. The NFC debug device of claim 3, wherein the load resonance adjustment unit comprises: the resonant capacitor bank comprises a load capacitor bank and a resonant capacitor bank, wherein a first end of the load capacitor bank is connected with a first end of the resonant capacitor bank, and a second end of the resonant capacitor bank is grounded;
wherein the load capacitance group comprises the first load capacitance and a second load capacitance which are mutually connected in parallel;
the resonant capacitor group comprises a first resonant capacitor and a second resonant capacitor which are connected in parallel.
10. An electronic device, comprising: an NFC chip, an NFC antenna, and an NFC commissioning device as recited in any one of claims 1-9.
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| CN202310142312.5A CN115865139A (en) | 2023-02-21 | 2023-02-21 | NFC debugging device and electronic equipment |
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| CN202310142312.5A CN115865139A (en) | 2023-02-21 | 2023-02-21 | NFC debugging device and electronic equipment |
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| CN102324949A (en) * | 2011-09-13 | 2012-01-18 | 深圳桑菲消费通信有限公司 | Mobile communication terminal |
| CN209375615U (en) * | 2019-04-02 | 2019-09-10 | 深圳市赛盛技术有限公司 | A kind of radio circuit |
| CN111741149A (en) * | 2020-06-19 | 2020-10-02 | 上海艾为电子技术股份有限公司 | Electronic equipment |
| CN217508769U (en) * | 2022-04-13 | 2022-09-27 | Oppo广东移动通信有限公司 | NFC antenna circuit and electronic equipment |
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