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Resonant frequency adjusting method and device, chip, terminal and readable storage medium

An adjustment method and technology of resonant frequency, applied in near-field transmission systems, electrical components, transmission systems using capacitive coupling, etc., can solve problems such as affecting NFC performance, changing mobile phone load characteristics, insensitive card swiping, etc., to improve performance. Effect

Active Publication Date: 2022-02-08
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The NFC coil on the mobile phone protective case may change the original load characteristics of the mobile phone, affect its NFC performance, and cause the problem of insensitive card swiping

Method used

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  • Resonant frequency adjusting method and device, chip, terminal and readable storage medium
  • Resonant frequency adjusting method and device, chip, terminal and readable storage medium
  • Resonant frequency adjusting method and device, chip, terminal and readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In the embodiment of the present application, the method for adjusting the resonant frequency described above can be applied to an NFC circuit, and the NFC circuit can be configured in the above-mentioned terminal, and the method for adjusting the resonant frequency can be performed by a device for adjusting the resonant frequency configured in the near-field communication chip of the NFC circuit, or It is executed by the resonant frequency adjustment device configured in the processor of the terminal. The NFC circuit is provided with a tuning unit comprising a variable capacitance.

[0054] Such as figure 2 As shown, the above method for adjusting the resonant frequency can be implemented by using the following steps 201 to 203 .

[0055] Step 201, detecting whether the signal parameter of the NFC circuit is outside the preset parameter range.

[0056] In the embodiment of the present application, the signal parameter of the NFC circuit is within the preset paramete...

Embodiment 2

[0065] This embodiment illustrates the structure of the NFC circuit in the first embodiment above. Such as image 3 As shown, it is a schematic structural diagram of the NFC circuit provided by the embodiment of the present application.

[0066] Optionally, the above NFC circuit is provided with a tuning unit 31 including a variable capacitor and a near field communication chip (NFC chip) U1. The NFC chip U1 is used to adjust the capacitance value of the variable capacitor when the signal parameter of the NFC circuit is outside the preset parameter range and the NFC circuit does not receive a response signal corresponding to the above-mentioned card search instruction.

[0067] Optionally, the above NFC circuit may further include an antenna RF connected to the tuning unit 31 and a filter unit 32, the filter unit 32 is connected to the NFC chip U1, and is used to filter the signal output by the NFC chip U1.

[0068] Optionally, in some embodiments of this application, such a...

Embodiment 3

[0074] This embodiment illustrates the specific implementation manners of step 201 and step 203 in the first embodiment above.

[0075] Optionally, in some embodiments of the present application, in the above step 201, detecting whether the signal parameter of the NFC circuit is outside the preset parameter range may be implemented by using the following steps A01 to A02.

[0076] Step A01, detecting whether the variation of the voltage across the antenna in the NFC circuit is greater than a preset voltage threshold, or detecting whether the variation of the output current of the NFC chip in the NFC circuit is greater than a preset current threshold.

[0077] Step A02, if the variation of the voltage at both ends of the antenna in the NFC circuit is greater than the preset voltage threshold, or, the variation of the output current of the NFC chip in the NFC circuit is greater than the preset current threshold, then determine that the signal parameter of the NFC circuit is withi...

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PUM

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Abstract

The invention belongs to the technical field of near-field communication, and particularly relates to a resonant frequency adjusting method and device, a chip, a terminal and a readable storage medium. In the embodiment of the invention, when a signal parameter of a near-field communication circuit is located outside a preset parameter range and the near-field communication circuit does not receive a response signal corresponding to a card searching instruction, the capacitance value of the variable capacitor is adjusted, so that the signal parameter of the near field communication circuit is within the preset parameter range, and then the resonant frequency of the NFC circuit is within the preset resonant frequency range, so that the situation that the NFC circuit of the terminal is affected by an electromagnetic interference object and cannot work normally is avoided, and the use performance of the NFC circuit of the terminal is improved.

Description

technical field [0001] The present application belongs to the technical field of near field communication, and in particular relates to a resonance frequency adjustment method, device, chip, terminal and readable storage medium. Background technique [0002] Near Field Communication (NFC) is a short-range wireless communication technology that allows non-contact point-to-point data transmission (within ten centimeters) between terminals with NFC functions. Rich intuition and other features. NFC provides a simple, touch-based solution that allows consumers to exchange information and access content and services simply and intuitively. [0003] However, at present, when a terminal with an NFC function is used to implement the NFC function, it often fails to work normally. For example, some existing mobile phone protective shells have coils and LED lights, and the coils receive energy from the NFC radiation of the mobile phone to make the LED lights emit light. The NFC coil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B5/00
CPCH04B5/22H04B5/70
Inventor 陈华星
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD