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Passive NFC interface and passive NFC device

An interface and device technology, applied in the field of passive NFC interface and passive NFC device, can solve the problems of communication failure, NFC device cannot be powered on, low energy conversion efficiency, etc., to reduce energy consumption, technical means are simple and easy to operate, The effect of strong power supply

Inactive Publication Date: 2022-08-02
SHANGHAI FUDAN MICROELECTRONICS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional NFC passive interface, on the one hand, when the NFC device enters the field, the NFC device cannot be powered on and the communication fails due to the excessive current load. On the other hand, when the NFC device collects energy, the energy conversion efficiency is also low. very low

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  • Passive NFC interface and passive NFC device
  • Passive NFC interface and passive NFC device
  • Passive NFC interface and passive NFC device

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Embodiment Construction

[0030] As described in the background art, the traditional NFC passive interface, on the one hand, will cause the NFC device to fail to power on and communication failure due to the excessive current load at the moment when the NFC device enters the field. On the other hand, when the NFC device collects energy, The energy conversion efficiency is also very low.

[0031] Unlike the prior art, the present invention provides an improved passive NFC interface and passive NFC device. The passive NFC interface provided by the embodiment of the present invention includes: a power consumption module; an NFC antenna for establishing a communication connection with an active NFC device, and inducing an electromagnetic field energy from the active NFC device to generate an induced voltage to perform an operation on the power consumption module. Power supply; the regulating module is used to limit the power supply current of the power consumption module when the communication connection i...

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Abstract

The invention provides a passive NFC (Near Field Communication) interface and passive NFC equipment. The passive NFC interface comprises: a power utilization module; the NFC antenna is used for establishing communication connection with active NFC equipment and sensing electromagnetic field energy from the active NFC equipment to generate induced voltage so as to supply power to the power utilization module; and the adjusting module is used for limiting the power supply current of the power utilization module when the communication connection is unstable, and canceling the limitation when the communication connection is stable. The method has the beneficial effects. For example, when the communication connection between the passive NFC interface and the active NFC equipment is unstable, the power supply current transmitted to the power utilization module by the rectifier module can be limited through the adjusting module, so that the problems that the passive NFC interface and the passive NFC equipment comprising the passive NFC interface cannot be powered on or the communication fails and the like are solved; moreover, when the communication connection is stable, the limitation on the power supply current can be canceled through the adjusting module, so that the power supply capability and the power supply efficiency of the passive NFC interface are improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a passive NFC interface and a passive NFC device. Background technique [0002] Because NFC (Near Field Communication) uses a magnetic field as an information carrier, it achieves a much shorter communication distance (several centimeters) than traditional wireless communication, and has the advantages of passive communication, high security, and wide use. Therefore, NFC-based applications are becoming more and more extensive, such as NFC payment, NFC pairing, NFC electronic price tag, NFC electronic ink screen, NFC smart lock, etc. [0003] An important part of the NFC standard is the legacy of the high-frequency RFID (Radio Frequency Identification, Radio Frequency Identification) passive interface, which allows communication between the NFC reader interface and the NFC passive interface. However, the traditional NFC passive interface, on the one hand, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B5/00
CPCH04B5/70H04B5/26
Inventor 赵晶剑卢友顺
Owner SHANGHAI FUDAN MICROELECTRONICS GROUP