System monitoring reprogrammable implantable transponder
First Claim
Patent Images
1. A passive transponder comprising:
- antenna means for receiving an input signal containing data from a signal source and transmitting an output signal to said signal source;
memory means for storing said data received by said transponder from said signal source, said transponder being in one of a read mode for outputting said data to said signal source as said output signal and a programming mode wherein said memory means stores said data in response to said input signal; and
integrity means for indicating to said signal source the sufficiency of said input signal for causing said memory means to store said data.
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Abstract
A passive transponder including an antenna for receiving an input signal and transmitting an output and a memory for storing the data received by the transponder from an interrogator. The transponder can operate in either a read mode or a programming mode. The transponder includes an integrity circuit for indicating the integrity of the input signal, a monitoring circuit that monitors a characteristic of a host and an impedance modulator that prevents the overmodulation of the output signal.
254 Citations
26 Claims
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1. A passive transponder comprising:
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antenna means for receiving an input signal containing data from a signal source and transmitting an output signal to said signal source; memory means for storing said data received by said transponder from said signal source, said transponder being in one of a read mode for outputting said data to said signal source as said output signal and a programming mode wherein said memory means stores said data in response to said input signal; and integrity means for indicating to said signal source the sufficiency of said input signal for causing said memory means to store said data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for monitoring a reprogrammable transponder, said system comprising:
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a passive transponder; an interrogator for transmitting an output signal containing data to said transponder and receiving an input signal from said transponder; and said transponder including antenna means for receiving said output signal containing said data from said interrogator and transmitting said input signal to said interrogator;
memory means for storing said data received by said transponder from said interrogator, said transponder being in one of a read mode for outputting said data to said interrogator as said input signal and a programming mode wherein said memory means stores said data in response to said output signal from said interrogator; and
integrity means for indicating to said interrogator the sufficiency of said output signal for causing said memory means to store said data.
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15. A passive transponder comprising:
- antenna means for receiving an input signal containing data from a signal source and transmitting an output signal to said signal source;
memory means for storing said data received by said transponder from said signal source, said transponder being in one of a read mode for outputting said data to said signal source as said output signal and a programming mode wherein said memory means stores said data in response to said input signal; and
monitoring means for monitoring a characteristic of a host, wherein said monitoring means is coupled to said memory means, said memory means including a plurality of memory addresses, each of said plurality of addresses being sequentially addressed in response to said input signal, said monitoring means monitoring said characteristic during the period of time required to address a predetermined number of said addresses of said memory means and producing a characteristic measurement, said output signal including said characteristic measurement. - View Dependent Claims (16, 17, 18, 19, 20)
- antenna means for receiving an input signal containing data from a signal source and transmitting an output signal to said signal source;
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21. A passive transponder comprising:
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an antenna for receiving an input signal containing data from a signal source and transmitting an output signal to said signal source; memory means for storing said data received by said transponder from said signal source, said transponder being in one of a read mode for outputting said data to said signal source as said output signal and a programming mode wherein said memory means stores said data in response to said input signal; and impedance modulation means for modulating the impedance of the antenna to output a carrier signal formed by the changing impedance permitting said antenna to output said output signal and receive said input signal substantially simultaneously by applying a load to said antenna in response to said output signal to reduce interference with said input signal, said impedance being modulated in response to the input signal. - View Dependent Claims (22, 23, 24)
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25. A system for monitoring a characteristic of a host, said system comprising:
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a transponder; an interrogator for transmitting an output signal containing data to said transponder and receiving an input signal from said transponder; said transponder including antenna means for receiving said output signal containing data from said interrogator and transmitting said input signal to said interrogator;
memory means for storing said data received by said transponder from said interrogator, said transponder being in one of a read mode for outputting said data to said interrogator as said input signal and a programming mode wherein said memory means stores said data in response to said output signal; and
monitoring means for monitoring a characteristic of a host, wherein said monitoring means is coupled to said memory means, said memory means including a plurality of memory addresses, each of said plurality of addresses being sequentially addressed in response to said output signal, said monitoring means monitoring said characteristic during the period of time required to address a predetermined number of said addresses of said memory means and producing a characteristic measurement, said input signal including said characteristic measurement.
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26. A system for monitoring a reprogrammable transponder, said system comprising:
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a transponder; an interrogator for transmitting an output signal containing data to said transponder and receiving an input signal from said transponder; said transponder including art antenna for receiving said output signal containing data from said interrogator and transmitting said input signal to said interrogator;
memory means for storing said data received by said transponder from said interrogator, said transponder being in one of a read mode for outputting said data to said interrogator as said input signal and a programming mode wherein said memory means stores said data in response to said output signal; and
impedance modulation means for modulating the impedance of the antenna to output a carrier signal formed by the changing impedance permitting said antenna to output said input signal and receive said output signal substantially simultaneously by applying a load to said antenna in response to said input signal to reduce interference with said output signal, said impedance being modulated in response to the input signal.
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Specification