NFC system wake-up using energy harvesting

A technology for energy harvesting and system power supply, applied in the device field of NFC systems, which can solve problems such as continuous energy consumption that limits the availability and service life of total NFC devices

Active Publication Date: 2021-10-22
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a constant energy consumption that limits the overall NFC device availability and lifetime

Method used

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  • NFC system wake-up using energy harvesting
  • NFC system wake-up using energy harvesting
  • NFC system wake-up using energy harvesting

Examples

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Embodiment Construction

[0038] Representative devices and methods according to the present application are described in this section. These examples are provided only to add context and to aid in understanding the described embodiments. It will therefore be apparent to one skilled in the art that the described embodiments may be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail so as not to unnecessarily obscure the described embodiments. Other embodiments are possible, such that the following examples should not be considered limiting.

[0039] In the following detailed description, reference is made to the accompanying drawings which form a part hereof and in which are shown by way of illustration specific embodiments in accordance with the described embodiments. While these embodiments have been described in sufficient detail to enable those skilled in the art to practice the described embodiments, it is to be ...

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Abstract

The present invention provides a system utilizing a system power enable switch controlled by a near field communication (NFC) front end utilizing energy harvesting. In one embodiment, RF power in the 13.56MHz band generated by an NFC counterpart (eg, a mobile phone) is detected by an energy harvesting unit that is part of a non-battery powered NFC communication device. After activation, the system can perform the actions required to communicate to the presented device (ie, the NFC counterpart). Later, the system can switch itself again to the non-powered state. In another embodiment, this feature can also be used to control the NFC protection circuit very quickly after the NFC device is exposed to an external high frequency (HF) field.

Description

technical field [0001] The described embodiments relate generally to apparatus and methods for NFC (Near Field Communication) systems, and more particularly to apparatus and methods enabling wake-up of NFC systems utilizing energy harvesting. Background technique [0002] Battery operated NFC devices require minimal current consumption during operation and backup. Especially for NFC contactless access systems, changing the battery contributes to a major operating cost of the NFC system. If this battery swap rate can be reduced by reducing the overall current consumption of the system, the overall operating cost of the NFC system will be reduced. [0003] Currently, NFC devices require a low power standby configuration in order to detect external radio frequency (RF) fields. The host controller and NFC front end are in a low power mode that requires battery power to be present at all times, causing battery power current drain. Additional energy may be required for supply v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B5/00H04W4/80H04W52/02H02J50/20
CPCH04B5/0037H04W52/0225H02J50/20H04B5/0031H04B5/0056H04B5/0068
Inventor 马库斯·渥巴克莱昂哈德·科尔曼尤尔根·施罗德
Owner NXP BV
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