FREQUENCY-SAMPLING CIRCUIT AND METHOD FOR HEALTH PROGNOSTICS
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United States of America Patent
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Issued Date -
Sep 13, 2012
app pub date -
Feb 28, 2012
filing date -
Mar 7, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present invention provides a frequency-sampling circuit and method for characterizing a health condition of a test unit attached to a power supply. The frequency-sampling circuit is connected externally to the test unit. The circuit comprises an inductor and a capacitor connected in series at an output. When switched, the circuit resonates with an AC loop current to produce a damped-frequency response at the output. Frequency measurements of this response are processed to generate SoH or RUL estimates for the test unit. The voltages applied within the frequency-sampling circuit are limited, which in turn limits the AC loop current to avoid loading the power supply. Incorporating the inductance and capacitance with in the frequency-sampling circuit allows the circuit to be configured for different classes of test units having a wide range of characteristic impedances.
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