Enhanced efficiency energy-scavenging interface, method for operating the energy-scavenging interface, and energy-scavenging system comprising the energy-scavenging interface
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United States of America Patent
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Oct 4, 2016
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app pub date -
Sep 25, 2013
filing date -
Sep 27, 2012
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Abstract
An energy-scavenging interface includes first and second switches connected in series between an input and reference, and third and fourth switches connected in series between the input and an output. A control circuit closes the first and second switches and opens the third switch for a first time interval to store charge in a storage element. A scaled copy of a peak value of the charging current is obtained. The control circuit then opens the first switch and closes the third and fourth switches to generate an output signal as long as the value in current of the output signal is higher than the value of said scaled copy of the peak value.
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