PASSIVE RF TAG WITH POWER CYCLING
First Claim
1. A method of operating a passive integrated circuit comprising:
- receiving radio frequency (RF) energy at a first frequency from a first conductive coil having a plurality of turns affixed to the integrated circuit;
conditioning the radio frequency energy to power digital circuitry in the passive integrated circuit; and
transmitting data using a second conductive coil having a plurality of turns affixed to the integrated circuit when reception of radio frequency energy at the first frequency from the first conductive coil has stopped.
3 Assignments
0 Petitions
Accused Products
Abstract
A passive tag embedded in a package includes multiple conductive coils. A first coil receives radio frequency (RF) energy used to power the tag. Additional coils receive and/or transmit data signals, clock signals, and carrier signals. The RF energy and other signals may be at different frequencies. An RF probe includes a first coil to emit the RF energy to power the tag. The RF probe includes additional coils corresponding to the additional coils in the tag. The RF probe may turn off the RF signal used for power during communication. The RF energy may be rectified to provide DC power to circuits in the tag, or may be used directly for adiabatic circuits. The RF probe and the package may have complementary shapes to facilitate alignment of the coils.
10 Citations
19 Claims
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1. A method of operating a passive integrated circuit comprising:
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receiving radio frequency (RF) energy at a first frequency from a first conductive coil having a plurality of turns affixed to the integrated circuit; conditioning the radio frequency energy to power digital circuitry in the passive integrated circuit; and transmitting data using a second conductive coil having a plurality of turns affixed to the integrated circuit when reception of radio frequency energy at the first frequency from the first conductive coil has stopped. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a passive integrated circuit comprising:
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receiving radio frequency energy at a first frequency from a first conductive coil having a plurality of turns affixed to the integrated circuit; conditioning the radio frequency energy to power digital circuitry in the passive integrated circuit; and receiving data using a second conductive coil having a plurality of turns affixed to the integrated circuit when reception of radio frequency energy at the first frequency from the first conductive coil has stopped. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of operating a radio frequency (RF) probe to communicate with a passive tag, the method comprising:
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transmitting a signal at a first frequency using a first conductive coil with a plurality of turns to provide a source of power to the passive tag; stopping the transmission of the signal at the first frequency; and communicating with the passive tag using a signal at a second frequency transmitted from a second conductive coil with a plurality of turns. - View Dependent Claims (16, 17, 18, 19)
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Specification