Power-Efficient Pressure-Sensor Implant
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United States of America Patent
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Issued Date -
Jan 10, 2019
app pub date -
Dec 30, 2015
filing date -
Dec 30, 2015
priority date (Note) -
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Abstract
Apparatus and methods are described, including apparatus that includes an antenna (34), configured to, by drawing energy from a magnetic field, provide a main supply voltage. The apparatus further includes operational circuitry (46, 22) configured to operate only if a derived supply voltage, derived from the main supply voltage and supplied to the operational circuitry, is greater than a threshold value, and modulating circuitry (36, 40, 42), configured to modulate a load of the antenna by alternatingly (i) connecting current-drawing circuitry to the main supply voltage, thus causing the main supply voltage to drop below the threshold value, and (ii) disconnecting the current-drawing circuitry from the main supply voltage without disconnecting the operational circuitry from the main supply voltage. Other embodiments are also described.
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