Device for correcting a digital estimate of an electric signal
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United States of America Patent
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Jun 13, 2006
Grant Date -
Jun 8, 2006
app pub date -
Dec 7, 2004
filing date -
Dec 7, 2004
priority date (Note) -
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Abstract
A device for correcting a digital estimate of an electric signal is described. The device includes a comparator that generates a current proportional to the difference between an analog estimate signal, which derives from the digital estimate, and the electric signal. The device also includes a capacitor positioned to be charged by the current, a transistor that discharges the capacitor, and a comparator that compares the voltage at the terminal of the capacitor with a reference voltage. The device also includes a controller that drives the transistor in response to the output signal of the comparator and a logic device that generates a correction digital signal to be added to or subtracted from the digital estimate of the electric signal in correspondence of an ascending or descending waveform of the electric signal.
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