Electromagnetic noise cancellation apparatus for cable deployed at varying length
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United States of America Patent
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Jun 14, 2022
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N/A
app pub date -
Mar 15, 2019
filing date -
Mar 15, 2019
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Abstract
A device such as an autonomous mobile device may include an extensible mast or other structure that changes length during operation. A cable between electronics at the ends of the structure includes a data line for signals and a power line for electrical power. A deployed length of the cable is determined and used to determine the phase of an antinoise signal that is radiated using the power line. The antinoise signal destructively interferes with at least a portion of the radiated noise from the data line, reducing the overall amplitude of the radiated noise. The deployed length may also be used to adjust other parameters, such as equalizer settings for one or more of a transmitter or receiver that is connected to the data line.
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