Device for wireless operation and method for operating the device
First Claim
Patent Images
1. A method of operating an electronic device, comprising:
- initially operating the device in a meta-stable, non-oscillating, first mode of operation draining practically no current from a power supply;
operating the device in an oscillating, second mode of operation, in which the device is instable and wherein the device oscillates at a predetermined oscillation frequency at a higher power dissipation;
transferring the device from said first mode of operation to said second mode of operation by means of a signal having a predetermined signal frequency and power level and being input to an input terminal of the device via an antenna;
terminating the second mode of operation and transferring said device to said meta-stable, first mode of operation in response to a reset circuit.
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Abstract
An electronic device and a method of operating the device. The device receives a first signal having a first frequency and a predetermined signal strength and retransmits a signal after a latency period and during a time period. The device comprises an oscillation circuit operating in a sub-threshold area in a meta-stable, first mode of operation. When the first signal is received, the oscillation circuit is trigged and passes to an active mode in a second mode of operation, wherein the circuit oscillates. Finally, the device is reset to the first mode of operation. The device may have an identity, which is used for the purpose of the system, which may be an RFID system.
9 Citations
18 Claims
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1. A method of operating an electronic device, comprising:
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initially operating the device in a meta-stable, non-oscillating, first mode of operation draining practically no current from a power supply; operating the device in an oscillating, second mode of operation, in which the device is instable and wherein the device oscillates at a predetermined oscillation frequency at a higher power dissipation; transferring the device from said first mode of operation to said second mode of operation by means of a signal having a predetermined signal frequency and power level and being input to an input terminal of the device via an antenna; terminating the second mode of operation and transferring said device to said meta-stable, first mode of operation in response to a reset circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An electronic device, comprising:
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an amplification member and a filter member connected to form an oscillation circuit, a bias circuit for maintaining the oscillation circuit in an inactive, meta-stable, non-oscillating first mode of operation, having low power dissipation, an input circuit for inputting a signal via an antenna to said amplification member for transferring said device into a second mode of operation, in which the device is instable and has a higher power dissipation wherein the device oscillates at a predetermined oscillation frequency; a reset circuit for stopping the oscillations and resetting said device to said first mode of operation. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method of operating an electronic device, comprising:
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initially operating the device in a meta-stable, first mode of operation having low power dissipation; sending a signal for a short time period by a reader, said signal having a specific frequency; transferring the device from said first mode of operation to an oscillating, second mode of operation, in which the device is instable and wherein the device oscillates at a predetermined oscillation frequency, by means of said signal having a predetermined signal frequency and higher power level and being input to an input terminal of the device via an antenna; listening by said reader for signals having the same or similar frequency and if such a signal is sensed after the reader signal has ceased, this indicates that an electronic device responsive to substantially that frequency is present within the range of the reader, and terminating the second mode of operation and transferring said device to said meta-stable, first mode of operation by a reset circuit. - View Dependent Claims (17)
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18. An electronic device, comprising:
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an amplification member and a filter member connected to form an oscillation circuit, a bias circuit for maintaining the oscillation circuit in an inactive, meta-stable, first mode of operation, having low power dissipation, a reader adapted to send a signal having a specific frequency for a short time period; an input circuit for inputting a signal via an antenna to said amplification member for transferring said device into a second mode of operation, in which the device is instable and has a higher power dissipation wherein the device oscillates at a predetermined oscillation frequency; said reader being adapted to listen for signals having the same or similar frequency and if such a signal is sensed after the reader signal has ceased, this indicates that an electronic device responsive to substantially that frequency is present within the range of the reader.
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Specification