公开(公告)号：US09762292B2

公开(公告)日：2017-09-12

申请号：US14040275

申请日：2013-09-27

Applicant: Texas Instruments Incorporated

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

IPC: 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.