Patent ID: 6462647
Filing Date: 2002-10-08
Classification: G06K

Abstract:
An active transponder including:an antenna arranged so as to be able to receive and transmit a radioelectric signal containing data; processing means connected to said antenna, and arranged so as to be able to provide said antenna with identification data to be transmitted in the form of radioelectric signals; an accumulator arranged so as to be able to supply a first electric power supply signal to the components of said transponder; and storage means arranged so as to be able to store the electric energy originating from said radioelectric signal received by said antenna, and to supply a second electric power supply signal, this transponder further including: first and second means for comparing respectively said first and second power supply signals to a minimum threshold provided by first supply means and, in response, providing respectively first and second control signals; and charging means controlled by said first and second control signals, and arranged so that, when said first and second power supply signals are respectively less and greater than said minimum threshold, said accumulator is charged, via said charging means, from the power contained in said storage means.