Rechargeable active transponder
First Claim
1. 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.
1 Assignment
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Accused Products
Abstract
The present invention concerns an active transponder (30) including an antenna (32) for exchanging a radioelectric signal (34), processing means (36), an accumulator (38) able to supply a first power supply signal (V1), and storage means (40) able to store the power originating from the received radioelectric signal, and to supply a second power supply signal (V2). This transponder further includes: two means (42, 46) for comparing the two power supply signals to a minimum threshold (Vmin) and, in response, providing two control signals (V3, V4); and charging means (50) controlled by the two control signals, so that the accumulator can be charged, via the charging means, from the stored power. One advantage of such a transponder is that the accumulator can be automatically recharged, as soon as the latter is no longer sufficiently charged to assure the functions of the transponder.
84 Citations
12 Claims
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1. An active transponder including:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A portable device including
an active transponder 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.
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Specification