PULSED LEVEL GAUGE SYSTEM WITH SUPPLY VOLTAGE CONTROLLED DELAY
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United States of America Patent
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Issued Date -
Mar 7, 2013
app pub date -
Sep 6, 2011
filing date -
Sep 6, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A level gauge system comprising transmission signal generating circuitry for generating a transmission signal; a propagation device connected to the transmission signal generating circuitry and arranged to propagate the transmission signal towards a surface of the product inside the tank, and to return a reflected signal resulting from reflection of the transmission signal at the surface of the product contained in the tank. The level gauge system further comprises reference signal providing circuitry configured to provide a reference signal. At least one of the transmission signal generating circuitry and the reference signal providing circuitry comprises delay circuitry. The delay circuitry comprises at least one delay cell exhibiting a propagation delay for pulses passing through the at least one delay cell that varies in dependence of a supply voltage provided to the at least one delay cell, and voltage control circuitry connected to the at least one delay cell.
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