Analog RFID System
Methods and apparatus, including computer program products, for an analog RFID system. A radio frequency identification (RFID) device includes an antenna linked to an integrated circuit, the integrated circuit comprising tag circuitry and analog modulation circuitry, a device linked to the integrated circuit, the device generating an analog signal output, and the analog modulation circuitry configured to conditioning the analog signal output.
1 . A radio frequency identification (RFID) device comprising:
an antenna linked to an integrated circuit, the integrated circuit comprising tag circuitry and analog modulation circuitry;
a device linked to the integrated circuit, the device generating an analog signal output; and
the analog modulation circuitry configured to condition the analog signal output.
2 . The RFID device of claim 1 wherein the conditioning comprises modulating antenna feed point impedance in an analog fashion with infinitely variable states between maxima and minima.
3 . The RFID device of claim 1 wherein the analog modulation circuitry includes one of a AM, FM, Phase I, I & Q Pulse Position, Position and Single Sideband Modulation (SSB) or combination thereof.
4 . The RFID device of claim 1 wherein the tag circuitry is configured to receive one or more commands from a RFID reader and execute instructions in response to the one or more commands.
5 . The RFID device of claim 4 wherein the one or more commands include an instruction to start transmitting analog data from the device.
6 . The RFID device of claim 4 wherein the one or more commands include one or more control parameters, the control parameters including a parameter to turn the device on, turn the device off, and/or set device timing and amplitude.
7 . The RFID device of claim 1 further comprising one or more additional devices linked to the integrated circuit, each of the one or more additional device generating an analog signal output.
8 . A system comprising:
a radio frequency identification (RFID) reader configured to transmit a continuous wave un-modulated radio frequency (RF) signal and receive a signal in response, the transmitted signal including one or more commands, the commands including one or more parameters;
a radio frequency identification (RFID) device configured to respond to the transmitted RF signal, the RFID device comprising:
an antenna linked to an integrated circuit, the integrated circuit comprising tag circuitry and analog modulation circuitry;
a device linked to the integrated circuit, the device generating an analog signal output; and
the analog modulation circuitry configured to condition the analog signal output.
9 . The system of claim 8 wherein the conditioning comprises modulating antenna feed point impedance in an analog fashion with infinitely variable states between maxima and minima.
10 . The system of claim 8 wherein the analog modulation circuitry includes one of a AM, FM, Phase I, I & Q Pulse Position, Position and Single Sideband Modulation (SSB) or combination thereof.
11 . The system of claim 8 wherein the tag circuitry is adapted receive the one or more commands from the RFID reader and execute instructions in response to the one or more commands.
12 . The system of claim 11 wherein the one or more commands include an instruction to start transmitting analog data from the device.
13 . The system of claim 11 wherein the control parameters include a parameter to turn the device on, turn the device off, and/or set device timing and amplitude.
14 . The system of claim 8 further comprising one or more additional devices linked to the integrated circuit, each of the one or more additional device generating an analog signal output.
15 . A method comprising:
transmitting a radio frequency identification (RFID) reader analog read/control command from a RFID reader to a RFID tag;
receiving the RFID reader analog read/control command in the RFID tag;
executing control instructions in the RFID tag in response to the command;
conditioning an analog data stream received by the RFID tag from an analog device; and
sending the modulated analog data stream to the RFID reader.
16 . The method of claim 15 wherein conditioning comprises modulating antenna feed point impedance in an analog fashion with infinitely variable states between maxima and minima.
17 . The method of claim 15 wherein the command includes an instruction to start transmitting analog data from the analog device.
18 . The method of claim 15 wherein the command includes one or more control parameters, the control parameters including a parameter to turn the device on, turn the device off, and/or set device timing and amplitude.