Advanced capability RFID system
First Claim
1. A radio-frequency transponder device for use with external devices, comprising:
- an antenna circuit configured to receive radio-frequency signals and to return modulated radio-frequency signals via continuous wave backscatter in response to the received radio-frequency signals in the range of 2400 MHz to 2500 MHz;
a modulation circuit coupled to the antenna circuit and configured to generate the modulated radio-frequency signals in response to the received radio-frequency signals; and
a low-power CMOS microprocessor coupled to the antenna circuit and configured to receive operating power from the received radio-frequency signals and to output power from the received signals to the external devices and further configured to monitor inputs on at least one input pin and to generate responsive signals to the modulation circuit for modulating the radio-frequency signals in response to an input signal received on the at least one input pin, the at least one input pin comprising at least one input-and-output pin, and wherein the microprocessor is configured to generate an output on the at least one input-and-output pin in response to the received radio-frequency signals, the microprocessor adapted to process both analog and digital signals.
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Accused Products
Abstract
A radio-frequency transponder device having an antenna circuit configured to receive radio-frequency signals and to return modulated radio-frequency signals via continuous wave backscatter, a modulation circuit coupled to the antenna circuit for generating the modulated radio-frequency signals, and a microprocessor coupled to the antenna circuit and the modulation circuit and configured to receive and extract operating power from the received radio-frequency signals and to monitor inputs on at least one input pin and to generate responsive signals to the modulation circuit for modulating the radio-frequency signals. The microprocessor can be configured to generate output signals on output pins to associated devices for controlling the operation thereof. Electrical energy can be extracted and stored in an optional electrical power storage device.
27 Citations
12 Claims
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1. A radio-frequency transponder device for use with external devices, comprising:
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an antenna circuit configured to receive radio-frequency signals and to return modulated radio-frequency signals via continuous wave backscatter in response to the received radio-frequency signals in the range of 2400 MHz to 2500 MHz; a modulation circuit coupled to the antenna circuit and configured to generate the modulated radio-frequency signals in response to the received radio-frequency signals; and a low-power CMOS microprocessor coupled to the antenna circuit and configured to receive operating power from the received radio-frequency signals and to output power from the received signals to the external devices and further configured to monitor inputs on at least one input pin and to generate responsive signals to the modulation circuit for modulating the radio-frequency signals in response to an input signal received on the at least one input pin, the at least one input pin comprising at least one input-and-output pin, and wherein the microprocessor is configured to generate an output on the at least one input-and-output pin in response to the received radio-frequency signals, the microprocessor adapted to process both analog and digital signals. - View Dependent Claims (2, 3, 4)
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5. A radio-frequency identification system for use with external devices, comprising:
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an interrogation device for generating radio-frequency signals and for receiving modulated radio-frequency signals in the range of 2400 MHz to 2500 MHz; and a transponder device, comprising; an antenna circuit configured to receive the radio-frequency signals and to return modulated radio-frequency signals via continuous wave backscatter in response to the received radio-frequency signals; a modulation circuit coupled to the antenna circuit and configured to generate the modulated radio-frequency signals in response to the received radio-frequency signals; and a low-power CMOS microprocessor coupled to the antenna circuit and configured to receive operating power from the received radio-frequency signals and to output power from the received signals to the external devices and further configured to monitor inputs on at least one input pin and to generate responsive signals to the modulation circuit for modulating the radio-frequency signals in response to an input signal received on the at least one input pin, the microprocessor adapted to process analog and digital signals, the at least one input pin comprising at least one input-and-output pin, and the microprocessor configured to generate an output on the at least one input-and-output pin in response to the received radio-frequency signals. - View Dependent Claims (6, 7, 8)
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9. A radio-frequency transponder system for use with at least one external device, comprising:
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means for generating radio-frequency signals and for receiving modulated radio-frequency signals; means for receiving the radio-frequency signals and for returning the modulated radio-frequency signals in response thereto, the modulation means configured to extract operating power from the received radio-frequency signals; and means for processing at least one input signal received on at least one input pin, the processing means compromising a low-power CMOS microprocessor coupled to the receiving means and adapted to extract operating power from the received radio-frequency signals and to provide the extracted power to the at least one external device, the processing means coupled to the modulation means and configured to generate a control signal to the modulation means in response to the received input signal from the at least one input pin comprising at least one input-and-output pin, and wherein the microprocessor is configured to generate an output on the at least one input-and-output pin in response to the received radio-frequency signals, the microprocessor adapted to process both analog and digital signals. - View Dependent Claims (10, 11, 12)
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Specification