PASSIVE TRANSPONDER FOR AN RFID SYSTEM, AND METHOD OF TRANSMITTING DATA FROM/TO A DATA SOURCE OF SUCH A PASSIVE TRANSPONDER
First Claim
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1. A passive transponder for an RFID system, comprising:
- an antenna;
an antenna oscillator circuit; and
a data source;
whereinthe antenna oscillator circuit is configured to operate at a first resonant frequency or at a second resonant frequency, depending on a reception of energy at the transponder or on a data transmission from/to the data source.
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Abstract
A passive transponder includes an antenna, an antenna oscillator circuit and a data source. The antenna oscillator circuit is configured to operate at a first resonant frequency or at a second resonant frequency, depending on reception of energy at the transponder or on a data transmission from/to the data source.
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Citations
15 Claims
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1. A passive transponder for an RFID system, comprising:
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an antenna; an antenna oscillator circuit; and a data source; wherein the antenna oscillator circuit is configured to operate at a first resonant frequency or at a second resonant frequency, depending on a reception of energy at the transponder or on a data transmission from/to the data source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A transponder system comprising:
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a passive transponder for an RFID system, comprising; an antenna; an antenna oscillator circuit; and a data source; wherein the antenna oscillator circuit is configured to operate at a first resonant frequency or at a second resonant frequency, depending on a reception of energy at the transponder or on a data transmission from/to the data source; and a reader configured to excite the passive transponder at the first resonant frequency and to receive a transmit signal from the passive transponder at the second resonant frequency. - View Dependent Claims (13, 14)
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15. A method of transmitting data from/to a data source of a passive transponder within an RFID system, the method comprising:
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exciting the passive transponder at a first resonant frequency of an antenna oscillator circuit of the passive transponder; and in the event of a data transmission, switching the first resonant frequency of the antenna oscillator circuit of the passive transponder to a second resonant frequency so as to transmit a data signal at the second resonant frequency.
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Specification