A radio frequency identification device comprises an integrated circuit
including a receiver, a transmitter, and a microprocessor. The receiver
and transmitter together define an active transponder. The integrated
circuit is preferably a monolithic single die integrated circuit including
the receiver, the transmitter, and the microprocessor. Because the device
includes an active transponder, instead of a transponder which relies on
magnetic coupling for power, the device has a much greater range.
