Zero-Power Wireless Device Programming
First Claim
1. A reader apparatus comprising:
- an antenna configured to;
transmit electromagnetic radiation, andreceive backscatter electromagnetic radiation; and
a processing unit configured to;
analyze the backscatter electromagnetic radiation to determine a supply voltage; and
in response to the supply voltage being greater than a threshold, alter the transmitted electromagnetic radiation to communicate tag data.
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Accused Products
Abstract
The present disclosure provides methods and apparatuses for loading program data on to an unpowered electronic device, such as an RFID tag that includes volatile memory. Initially, the tag is unpowered. Thus, the volatile memory in the tag will not have any stored data. In order to load data into the memory of the tag, a reader can power the tag wirelessly. The reader includes an antenna configured to transmit electromagnetic radiation and receive backscatter electromagnetic radiation. The reader also includes a processing unit. The processing unit is configured to analyze the backscatter electromagnetic radiation. The processing unit may analyze the backscatter radiation to determine a supply voltage induced in the tag. In response to the induced voltage being greater than a threshold, the processing unit may alter the transmitted electromagnetic radiation to communicate tag data.
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Citations
20 Claims
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1. A reader apparatus comprising:
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an antenna configured to; transmit electromagnetic radiation, and receive backscatter electromagnetic radiation; and a processing unit configured to; analyze the backscatter electromagnetic radiation to determine a supply voltage; and in response to the supply voltage being greater than a threshold, alter the transmitted electromagnetic radiation to communicate tag data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A body-mountable device comprising:
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an antenna configured to; receive first electromagnetic radiation during a first period of time, receive second electromagnetic radiation during a second period of time, wherein the received second electromagnetic radiation communicates data, and output a first signal based on the received first electromagnetic radiation; a rectification circuit configured to rectify at least the first signal to generate a supply voltage; and a volatile memory, wherein the volatile memory is powered by the supply voltage and configured to store the data communicated via the second electromagnetic radiation. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method comprising:
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transmitting electromagnetic radiation, receiving backscatter electromagnetic radiation; analyzing the backscatter electromagnetic radiation to determine a supply voltage; and in response to the supply voltage being greater than a threshold, altering the transmitted electromagnetic radiation to communicate tag data. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification