PERSISTENT NODES FOR RFID

摘要

An RFID transponder in one embodiment comprises a radio frequency (RF) transceiver, processing logic coupled to the RF transceiver, a switch coupled to the processing logic, a tunneling device coupled to the switch and a differential sensing circuit having a first input coupled to the tunneling device and a second input coupled to a predetermined reference voltage. In one embodiment, the tunneling device can discharge to a voltage below the predetermined reference voltage.

主权项

1. A state storage circuit for storing a state in an RFID circuit, the state storage circuit comprising:
a switch coupled to a first reference voltage; a capacitance circuit coupled to the switch, the capacitance circuit comprising a capacitor that discharges through a tunneling current, wherein the discharging of the capacitance circuit is dominated by the tunneling current when the state storage circuit's temperature is in the range of −25 degrees to +40 degrees C.