Communication system, electronic device and near field communication circuit in differential mode

Abstract

A communication system, an electronic device, and a differential mode near field communication circuit, including a first substrate including a near field communication integrated chip and a filter connected to the near field communication integrated chip, and a second substrate including a second substrate including a second near field communication integrated chip and a filter connected to the second substrate. And the second substrate comprises an impedance matching circuit connected with the filter through a coaxial line and a near field communication antenna circuit connected with the impedance matching circuit. Therefore, the near field communication integrated chip on the first substrate can be shared, and different antenna circuits and impedance matching circuits can be matched.

Description

Technical Field

[0001] The present invention relates to a near field communication circuit, and more particularly to a communication system and an electronic device having a near field communication circuit with a differential mode. Background Art

[0002] Integrated chips, filters, impedance matching circuits, and antennas of most near field communication circuits are fabricated on the same printed circuit board. Only a few near field communication circuits have antennas fabricated on another printed circuit board separately, and such additional near field communication circuits are limited to single-ended mode near field communication circuits that can share other modules and only replace the antenna. However, the anti-interference ability of such single-ended mode near field communication circuits is not good. How to fabricate a near field communication circuit with good anti-interference ability and capable of sharing modules is an important issue to be solved in this technical field. Summary of the Invention

[0003] The present invention provides a near field communication circuit, a communication system, and an electronic device with good anti-interference ability and capable of sharing modules.

[0004] The electronic device provided by the present invention includes a near field communication circuit with a differential mode. The near field communication circuit with a differential mode includes a first substrate and a second substrate. The first substrate includes a near field communication integrated chip and a filter connected to the near field communication integrated chip, and the second substrate includes an impedance matching circuit connected to the filter through a coaxial cable and a near field communication antenna circuit connected to the impedance matching circuit.

[0005] The communication system provided by the present invention includes a near field communication circuit with a differential mode. The near field communication circuit with a differential mode includes a first substrate and a second substrate. The first substrate includes a near field communication integrated chip and a filter connected to the near field communication integrated chip, and the second substrate includes an impedance matching circuit connected to the filter through a coaxial cable and a near field communication antenna circuit connected to the impedance matching circuit.

[0006] The near field communication circuit with a differential mode provided by the present invention includes a first substrate and a second substrate. The first substrate includes a near field communication integrated chip and a filter connected to the near field communication integrated chip, and the second substrate includes an impedance matching circuit connected to the filter through a coaxial cable and a near field communication antenna circuit connected to the impedance matching circuit.

[0007] In an embodiment of the present invention, the above-mentioned filter is an electromagnetic compatibility filter.

[0008] In an embodiment of the present invention, the above-mentioned impedance matching circuit includes an impedance matching part and a damping resistance part.

[0009] In an embodiment of the present invention, the above-mentioned second substrate can be replaced by a third substrate, where the third substrate includes: another impedance matching circuit connected to the filter through a coaxial cable; another near-field communication antenna circuit connected to another impedance matching circuit.

[0010] In an embodiment of the present invention, the impedance matching values of the above-mentioned impedance matching circuit and the other impedance matching circuit are different.

[0011] Since the integrated chip and the filter, as well as the impedance matching circuit and the antenna, are respectively fabricated on different substrates in the present invention, a near-field communication circuit, a communication system, and an electronic device with good anti-interference performance and shared modules can be provided.

[0012] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically given and described in detail in conjunction with the accompanying drawings as follows. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the near-field communication circuit provided by the embodiment of the present invention;

[0014] Figure 2 It is a schematic diagram of the electronic device provided by the embodiment of the present invention;

[0015] Figure 3 It is a schematic diagram of the communication system provided by the embodiment of the present invention. Detailed Embodiment

[0016] In order to make the purpose, technical solution, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art in the technical field of the present invention without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0017] Please refer to Figure 1 As shown, it is a schematic diagram of the near-field communication circuit provided by the embodiment of the present invention. The near-field communication circuit 1 provided by this embodiment is a differential-mode near-field communication circuit 1, where this differential-mode near-field communication circuit 1 includes a first substrate 11 and a second substrate 12. The first substrate 11 and the second substrate 12 are connected to each other through a coaxial cable 13. It should be noted that for the convenience of drawing, Figure 1 two coaxial cables 13 appear in the figure, but in fact, it is the same coaxial cable 13. And those skilled in the art can design the position of the grounding point (common ground point) according to the actual circuit design requirements.

[0018] Specifically, the first substrate 11 includes a near-field communication integration chip 111 and a filter 112 connected to the near-field communication integration chip 111. It should be noted that the filter 112 is an electromagnetic compatibility (EMC) filter. The second substrate 12 includes a first impedance matching circuit 121 connected to the filter 112 through a coaxial cable 13 and a first near-field communication antenna circuit 122 connected to the first impedance matching circuit 121. It should be noted that the first impedance matching circuit 121 includes an impedance adjustment section 1211 and a damping resistor section 1212. In addition, Figure 1 the components and their connection relationships of the filter 112, the first impedance matching circuit 121, and the first near-field communication antenna circuit 122 are schematic and can be replaced by other equivalent circuits. The present invention is not limited thereto.

[0019] Since the above-mentioned first substrate 11 and second substrate 12 are connected to each other through the coaxial cable 13, the near-field communication circuit 1 can replace the second substrate 12 with a third substrate, so that the third substrate is connected to the first substrate 11 through the coaxial cable 13. The third substrate is similar to the second substrate 12 and includes a second impedance matching circuit connected to the filter 112 through the coaxial cable 13 and a second near-field communication antenna circuit connected to the second impedance matching circuit. It should be noted that the impedance matching value of the second impedance matching circuit is different from that of the first impedance matching circuit, so the second near-field communication antenna circuit is also different from the first near-field communication antenna circuit 122.

[0020] Please refer to Figure 2 As shown, it is a schematic diagram of the electronic device provided by the embodiment of the present invention. The electronic device 2 provided by this embodiment includes a near-field communication circuit 1 and a system circuit, where the near-field communication circuit 1 is connected to the system circuit to transmit near-field communication signals to the system circuit or send near-field communication signals from the system circuit. It should be noted that the electronic device 2 can be a computer device such as a personal computer, a tablet computer, a notebook computer, etc. with computing power and wireless signal transceiver capabilities.

[0021] Please refer to Figure 3 As shown, it is a schematic diagram of the communication system provided by the embodiment of the present invention. The communication system 3 provided by this embodiment includes a near-field communication circuit 1 and a control circuit, where the near-field communication circuit 1 is connected to the control circuit to transmit near-field communication signals to the control circuit or send near-field communication signals from the control circuit. It should be noted that the communication system 3 can be a hardware device such as a wireless communication device, equipment, circuit, hardware, etc. with computing power and wireless signal transceiver capabilities.

[0022] In summary, for the communication system, electronic device, and differential-mode near-field communication circuit provided by the present invention, since the integrated chip and the filter, as well as the impedance matching circuit and the antenna are respectively fabricated on different substrates, a near-field communication circuit, communication system, and electronic device with good anti-interference performance and shared modules can be provided.

[0023] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed methods and technical contents within the scope of the technical solutions of the present invention to obtain equivalent embodiments with equivalent changes. However, as long as the content does not depart from the technical solutions of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solutions of the present invention.

Claims

1. A near-field communication circuit in differential mode, characterized in that, Comprising: A first substrate, including a near-field communication integration chip and a filter, wherein the filter is connected to the near-field communication integration chip; And A second substrate, including an impedance matching circuit and a near-field communication antenna circuit, wherein: The impedance matching circuit is connected to the filter through a coaxial cable; The near-field communication antenna circuit is connected to the impedance matching circuit.

2. The near-field communication circuit in differential mode according to claim 1, wherein The filter is an electromagnetic compatibility filter.

3. The near-field communication circuit in differential mode according to claim 1, characterized in that, The impedance matching circuit includes an impedance matching section and a damping resistor section.

4. The near-field communication circuit in differential mode according to claim 1, wherein The second substrate can be replaced with a third substrate, and the third substrate includes: Another impedance matching circuit, connected to the filter through the coaxial cable; Another near-field communication antenna circuit, connected to the another impedance matching circuit.

5. The near-field communication circuit in differential mode according to claim 4, characterized in that, The impedance matching values of the impedance matching circuit and the another impedance matching circuit are different.

6. An electronic device, characterized in that, Comprising: A differential-mode near-field communication circuit, including a first substrate and a second substrate, wherein: The first substrate includes a near-field communication integration chip and a filter, and the filter is connected to the near-field communication integration chip The second substrate includes an impedance matching circuit and a near-field communication antenna circuit, wherein: The impedance matching circuit is connected to the filter through a coaxial cable; The near-field communication antenna circuit is connected to the impedance matching circuit.

7. The electronic device according to claim 6, wherein The filter is an electromagnetic compatibility filter.

8. The electronic device according to claim 6, wherein The impedance matching circuit includes an impedance matching section and a damping resistor section.

9. The electronic device according to claim 6, wherein The second substrate can be replaced with a third substrate, and the third substrate includes: Another impedance matching circuit, connected to the filter through the coaxial cable; Another near-field communication antenna circuit, connected to the another impedance matching circuit.

10. The electronic device according to claim 6, characterized in that, The impedance matching values of the impedance matching circuit and the another impedance matching circuit are different.

11. A communication system, characterized in that, Comprising: A differential-mode near-field communication circuit, including a first substrate and a second substrate, wherein: The first substrate, including a near-field communication integration chip and a filter, the filter is connected to the near-field communication integration chip: The second substrate, including an impedance matching circuit and a near-field communication antenna circuit, wherein: The impedance matching circuit is connected to the filter through a coaxial cable; The near-field communication antenna circuit is connected to the impedance matching circuit.

12. The communication system according to claim 11, wherein The filter is an electromagnetic compatibility filter.

13. The communication system according to claim 11, wherein The impedance matching circuit includes an impedance matching section and a damping resistor section.

14. The communication system according to claim 11, wherein The second substrate can be replaced with a third substrate, and the third substrate includes: Another impedance matching circuit, connected to the filter through the coaxial cable; Another near-field communication antenna circuit, connected to the another impedance matching circuit.

15. The communication system according to claim 11, wherein The impedance matching values of the impedance matching circuit and the another impedance matching circuit are different.

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