Patent ID: 7307529

Claim:
An RFID tag circuit comprising: a fuse adapted to store configuration data in a way that survives loss of power, the fuse including a nonvolatile memory (NVM) element for storing the configuration data, the fuse further including a fuse switch; an operational component adapted to operate based on the configuration data, the operational component including a configurable circuit adapted to exhibit an operative impedance that varies according to the configuration data, in which the configuration data can take such values that the operative impedance is discretely variable, the configurable circuit including an impedance component, in which the fuse switch controls whether the impedance component will be part of the operative impedance; and a non-volatile memory (NVM) memory array distinct from the fuse and having a plurality of NVM cells that are addressable in terms of a row and a column and are adapted to store data in a way that survives loss of power.