Dynamic radio frequency power harvesting
First Claim
Patent Images
1. A method comprising:
- operating transistors using a pair of out-of-phase signals to dynamically harvest power from a radio frequency signal.
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Abstract
A single circuit may, in some embodiments, provide both static and dynamic power harvesting. The dynamic harvesting using switched transistors may be powered by the static harvesting circuit in one embodiment. That is, during a first phase, power may be generated in a static harvesting mode using diodes. That power generated in the first phase may be used in a second phase for dynamic power harvesting using transistors arranged in parallel to the diodes. The use of the transistors may, in some embodiments, result in the harvesting of more power. In some cases, the same capacitors may be used for both active and static harvesting.
26 Citations
28 Claims
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1. A method comprising:
operating transistors using a pair of out-of-phase signals to dynamically harvest power from a radio frequency signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A radio frequency power harvesting circuit comprising:
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a voltage doubler circuit; said voltage doubler circuit including a pair of diodes and a pair of capacitors; and a transistor coupled in parallel to each of said diodes. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A radio frequency identification tag comprising:
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a controller; and a power harvesting circuit coupled to said controller, said power harvesting circuit including a voltage doubler circuit having a pair of diodes and a pair of capacitors, a transistor coupled in parallel to each of said diodes. - View Dependent Claims (25, 26, 27, 28)
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Specification