Patent ID: 9589224
Date: 2017-03-07
CPC Classifications: G06K

Claim:
1. A method for operating a Radio Frequency Identification (“RFID”) transponder, comprising: performing energy harvesting operations by a voltage scavenging device of the RFID transponder to collect energy from a Radio Frequency (“RF”) field and store the energy in an energy storage device of the voltage scavenging device; causing a switch to change positions, when the energy storage device is charged to a pre-determined voltage level, from increasing or decreasing, by a voltage converter of the RFID transponder, a voltage level of a signal received from the voltage scavenging device to a sub-threshold voltage level that is at least one order of magnitude below a normal operating range for the RFID transponder; and supplying an operating voltage at the sub-threshold voltage level to at least the transceiver circuit.