RFID device having nonvolatile ferroelectric capacitor
First Claim
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1. A RFID device comprising:
- an antenna adapted and configured to transmit and receive a radio frequency signal to/from an external communication apparatus;
an analog block including a voltage multiplier adapted and configured to generate a power voltage depending on the radio frequency signal received through the antenna;
a digital block adapted and configured to receive the power voltage, process the radio frequency signal received through the antenna, and transmit a response signal to the analog block;
and a memory adapted and configured to store data, wherein the voltage multiplier comprises;
a plurality of rectification units each adapted and configured to rectify the radio frequency signal applied through the antenna; and
a plurality of charge pumping units each adapted and configured to include a plurality of nonvolatile ferroelectric capacitors and to charge-pump a voltage rectified in the plurality of rectification units.
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Abstract
A capacitor applied to a voltage multiplier and a modulator/demodulator of a RFID device is formed as a nonvolatile ferroelectric capacitor formed by the same process of a memory cell capacitor. The nonvolatile ferroelectric capacitor has a high dielectric constant to reduce the area of the capacitor.
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Citations
20 Claims
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1. A RFID device comprising:
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an antenna adapted and configured to transmit and receive a radio frequency signal to/from an external communication apparatus;
an analog block including a voltage multiplier adapted and configured to generate a power voltage depending on the radio frequency signal received through the antenna;
a digital block adapted and configured to receive the power voltage, process the radio frequency signal received through the antenna, and transmit a response signal to the analog block;
and a memory adapted and configured to store data, wherein the voltage multiplier comprises;
a plurality of rectification units each adapted and configured to rectify the radio frequency signal applied through the antenna; and
a plurality of charge pumping units each adapted and configured to include a plurality of nonvolatile ferroelectric capacitors and to charge-pump a voltage rectified in the plurality of rectification units. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A RFID device comprising:
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an antenna adapted and configured to transmit and receive a radio frequency signal from an external communication apparatus;
an analog block including a demodulator adapted and configured to demodulate an operating command signal in response to the radio frequency signal received through the antenna;
a digital block adapted and configured to receive the operating command signal and process data received through the antenna to transmit a response signal to the analog block; and
a memory adapted and configured to store the data,wherein the demodulator comprises;
a plurality of rectification units each adapted and configured to rectify the radio frequency signal applied through the antenna; and
a plurality of charge pumping units each adapted and configured to include a plurality of nonvolatile ferroelectric capacitors and to charge-pump a voltage rectified in the plurality of rectification units. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A RFID device comprising:
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an antenna adapted and configured to transmit and receive a radio frequency signal from an external communication apparatus;
an analog block including a modulator adapted and configured to modulate a response signal and output the radio frequency signal through the antenna;
a digital block adapted and configured to process the radio frequency signal received through the antenna and transmit the response signal to the analog block; and
a memory adapted and configured to store data,wherein the modulator comprises;
a modulator driving unit adapted and configured to output a modulator driving signal in response to the response signal; and
an input impedance modulation unit adapted and configured to include a plurality of serially connected nonvolatile ferroelectric capacitors and change input impedance in response to the modulator driving signal. - View Dependent Claims (15, 16, 17, 18)
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19. A RFID device comprising:
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an antenna adapted and configured to transmit and receive a radio frequency signal from an external communication apparatus;
an analog block including a voltage multiplier adapted and configured to generate a power voltage in response to a radio frequency signal received through the antenna, a demodulator adapted and configured to demodulate an operating command signal in response to the radio frequency signal received through the antenna, and a modulator adapted and configured to modulate a response signal and output the radio frequency signal through the antenna;
a digital block adapted and configured to receive the operating command signal by the power voltage and process data to transmit the response signal to the analog block;
and a memory adapted and configured to store the data, wherein the voltage multiplier comprises;
a plurality of rectification units each adapted and configured to rectify the radio frequency signal applied through the antenna; and
a plurality of first nonvolatile ferroelectric capacitors and a plurality of charge pumping units each adapted and configured to charge-pump a voltage rectified in the plurality of rectification units;
the demodulator comprises;
a plurality of rectification units each adapted and configured to rectify a radio frequency signal applied through the antenna and a plurality of second nonvolatile ferroelectric capacitors and a plurality of charge pumping units each adapted and configured to charge-pump a voltage rectified in the plurality of rectification units; and
the modulator comprises;
a modulator driving unit adapted and configured to output a modulator driving signal in response to the response signal; and
a plurality of third nonvolatile ferroelectric capacitors and an input impedance modulation unit adapted and configured to change input impedance in response to the modulator driving signal and transmit a phase-changed signal to the antenna. - View Dependent Claims (20)
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Specification