Sharing system of near-field communication and high-frequency wireless charging coil

Abstract

The invention discloses a sharing system of a near-field communication and high-frequency wireless charging coil. The main structure comprises a wireless signal transmission unit for receiving a signal, the signal is transmitted to a first resonance unit and a second resonance unit at two ends and enters a first notch filtering module and a second notch filtering module; a signal entering the first notch filter module enters the first rectification module and the third resonance unit; the signal entering the second notch filter module enters the second rectification module and the fourth resonance unit; a voltage stabilizing module stabilizes the voltage and then charges a load element; the near-field communication module is connected with the first notch filter module and the second notchfilter module to receive signals, and by means of the structure, the near-field communication module can share the coil with the third resonance unit and the fourth resonance unit in high-frequency wireless charging so as to achieve the effect of saving space.

Description

technical field [0001] The present invention provides a system for sharing coils of near field communication and high frequency wireless charging, especially a system that allows near field communication (NFC) and high frequency wireless charging (Class-E rectifier circuit) to share a coil. Background technique [0002] Near Field Communication (NFC) technology is now equipped with almost every mobile phone, and wireless charging is becoming more and more mature. I believe it will be a technology that every mobile phone will have in the future. But for today's mobile phones, the internal space is still relatively small, so the size of various parts or whether they need to exist are very particular. [0003] Therefore, if near field communication (NFC) and wireless charging share the same coil, there is no need to install additional coils, which can greatly reduce the space requirements. Basically, the general high-frequency wireless charging rectifier circuit and near-field...

AI Technical Summary

Problems solved by technology

Basically, the general high-frequency wireless charging rectifier circuit and near-field communication (NFC) can share the coil, but if it is used in high-frequency wireless charging (Class-E rectifier circuit), it will make the near-field communication (NFC) ) signal passes through the resonant unit in the high-frequency wireless charging (Class-E rectifier circuit) to form a capacitive input impedance that has nothing to do with the load RL. This capacitive input impedance will cause a parallel capacitance effect at the input end of the NFC circuit, so that the The NFC signal charges the voltage regulator module, making it difficult to achieve NFC matching, causing the NFC circuit to fail to detect the NFC signal, so how to make the NFC ) can share the coil with high-frequency wireless charging (Class-E rectifier circuit) without changing the signal to charge the battery, which is the problem to be solved

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