公开(公告)号：US20150091385A1

公开(公告)日：2015-04-02

申请号：US14040275

申请日：2013-09-27

Applicant: Texas Instruments Incorporated

Inventor： Srikanth Manian ,  Yogesh Darwhekar ,  Abhishek Agarwal ,  Koby Levy ,  Yaniv Tzoreff ,  Erez Shalom

IPC: H02J5/00 ,  H04B5/00

CPC classification number: H04B5/0037

Abstract: A method of charging a power harvested supply in an electronic communication device, which can be an NFC (near field communication) device. The power harvested supply in the electronic communication device is charged without causing dV/V violation and avoids false wake up. An RF (radio frequency) field is received at the antenna of the electronic communication device. A differential voltage is generated from the RF field at a first tag pin and a second tag pin of the electronic communication device. A bandgap reference voltage and a reference current are generated in response to the differential voltage. A shunt current is generated in response to the differential voltage and the bandgap reference voltage. A bank of switching devices is activated if the shunt current is more than the reference current.

Abstract translation: 一种在可以是NFC（近场通信）设备的电子通信设备中对功率采集的电源进行充电的方法。 在电子通信设备中收取的电力被充电而不引起dV / V违规，并避免虚假唤醒。 在电子通信设备的天线处接收RF（射频）字段。 在电子通信设备的第一标签引脚和第二标签引脚处的RF场产生差分电压。 响应于差分电压产生带隙参考电压和参考电流。 响应于差分电压和带隙基准电压产生并联电流。 如果分流电流大于参考电流，则一组开关器件被激活。