Radio frequency data communications device
First Claim
Patent Images
1. An integrated circuit comprising:
- a die including a transmitter having an antenna output and a detector having an antenna input;
a package housing the die;
a first contact directly electrically connected to the antenna output and accessible from outside the package;
a second contact directly electrically connected to the antenna input and accessible from outside the package; and
a short electrically connecting the first contact to the second contact outside the package.
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Abstract
A radio frequency identification device comprises an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.
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Citations
38 Claims
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1. An integrated circuit comprising:
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a die including a transmitter having an antenna output and a detector having an antenna input;
a package housing the die;
a first contact directly electrically connected to the antenna output and accessible from outside the package;
a second contact directly electrically connected to the antenna input and accessible from outside the package; and
a short electrically connecting the first contact to the second contact outside the package.
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2. A method of using an integrated circuit including a die having a transmitter including an antenna output and a detector including an antenna output, the integrated circuit further including a package housing the die, a first contact directly electrically connected to the antenna output and accessible from outside the package, and a second contact directly electrically connected to the antenna input and accessible from outside the package, the method comprising:
electrically shorting the first contact to the second contact outside the package.
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3. A transceiver comprising:
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a loop antenna having a first end connected to a bias voltage, and having a second end;
a detector including a Schottky diode having an anode connected to the second end of the antenna; and
an active transmitter having an output connected to the second end of the antenna. - View Dependent Claims (4, 5, 6)
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7. A transceiver comprising:
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a loop antenna having a first end connected to a bias voltage, and having a second end;
a second antenna;
a detector including a Schottky diode having an anode connected to the second end of the antenna; and
a transmitter having an output connected to the second antenna. - View Dependent Claims (8, 9)
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10. A transceiver comprising:
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an antenna having a first end connected to a bias voltage, and having a second end;
a detector including a Schottky diode having an anode connected to the second end of the antenna; and
an active transmitter having an output connected to the second end of the antenna. - View Dependent Claims (11, 12, 13)
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14. A transceiver comprising:
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a loop antenna having a first end, and having a second end;
a detector including a Schottky diode having a cathode connected to the second end of the antenna and defining a potential at the second end of the antenna, the first end of the antenna being connected to a potential lower than the potential of the second end of the antenna; and
a backscatter transmitter including a transistor having a first power electrode connected to the first end of the antenna, a second power electrode connected to the second end of the antenna, and a control electrode adapted to have a modulation signal applied thereto. - View Dependent Claims (15, 16, 17)
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18. A transceiver comprising:
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a loop antenna having a first end connected to a bias voltage, and having a second end;
a detector including a Schottky diode having an anode connected to the second end of the antenna;
a backscatter transmitter having a first output and having a second output;
a capacitor connected between the first output and the first end of the antenna; and
a capacitor connected between the second output and the second end of the antenna. - View Dependent Claims (19, 20, 21)
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22. A method of configuring a transceiver including a backscatter transmitter having first and second outputs, and a detector having a Schottky diode including an anode, the method comprising:
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applying a bias voltage to a first end of a loop antenna;
connecting a second end of the antenna to the anode;
connecting a first capacitor between the first output and the first end of the antenna; and
connecting a second capacitor between the second output and the second end of the antenna. - View Dependent Claims (23, 24, 25)
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26. A method of arranging a transceiver including a backscatter transmitter and a detector having a Schottky diode including a cathode, the method comprising:
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coupling a first end of a loop antenna to a ground potential;
coupling a second end of the antenna to the cathode;
coupling a first power electrode of a transistor to the first end of the antenna;
coupling a second power electrode of the transistor to the second end of the antenna; and
coupling a control electrode of the transistor to a modulation signal. - View Dependent Claims (27, 28, 29)
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30. A radio frequency identification device comprising:
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an integrated circuit including both a receiver and a transmitter;
a first antenna connected to the receiver; and
a second antenna connected to the transmitter wherein the receiver includes a Schottky diode having a cathode and an anode, and further comprising a current source configured to direct current from the anode to the cathode, the current from the current source being set to achieve a selected diode impedance and thus a desired receiver sensitivity.
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31. A radio frequency identification device comprising:
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an integrated circuit including both a receiver and a transmitter;
a first antenna connected to the receiver; and
a second antenna connected to the transmitter wherein the receiver includes a Schottky diode having a cathode and an anode, and further comprising a current source configured to direct current from the anode to the cathode, the current from the current source being set to achieve a selected diode impedance and thus a desired receiver sensitivity, wherein the receiver and transmitter do not operate simultaneously.
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32. A monolithic integrated circuit comprising:
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a die including a transmitter having an antenna output and a detector having an antenna input;
a package housing the die;
a first contact directly electrically connected to the antenna output and accessible from outside the package;
a second contact directly electrically connected to the antenna input and accessible from outside the package; and
a short electrically connecting the first contact to the second contact outside the package.
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33. A method of using a monolithic integrated circuit including a die having a transmitter including an antenna output and a detector including an antenna output, the integrated circuit further including a package housing the die, a first contact directly electrically connected to the antenna output and accessible from outside the package, and a second contact directly electrically connected to the antenna input and accessible from outside the package, the method comprising:
electrically shorting the first contact to the second contact outside the package.
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34. A transceiver comprising:
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a loop antenna having a first end connected to a bias voltage, and having a second end;
a separate second antenna;
a detector including a Schottky diode having an anode connected to the second end of the antenna; and
a transmitter having an output connected to the separate second antenna. - View Dependent Claims (35, 36)
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37. A radio frequency identification device comprising:
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an integrated circuit including both a receiver and a transmitter;
a first antenna connected to the receiver; and
a separate second antenna connected to the transmitter wherein the receiver includes a Schottky diode having a cathode and an anode, and further comprising a current source configured to direct current from the anode to the cathode, the current from the current source being set to achieve a selected diode impedance and thus a desired receiver sensitivity.
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38. A radio frequency identification device comprising:
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an integrated circuit including both a receiver and a transmitter;
a first antenna connected to the receiver; and
a separate second antenna connected to the transmitter wherein the receiver includes a Schottky diode having a cathode and an anode, and further comprising a current source configured to direct current from the anode to the cathode, the current from the current source being set to achieve a selected diode impedance and thus a desired receiver sensitivity, wherein the receiver and transmitter do not operate simultaneously.
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Specification