DIGITALLY ASSISTED CURRENT SENSE CIRCUIT AND METHOD FOR DIGITIZING A SENSED SIGNAL
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United States of America Patent
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Oct 20, 2016
app pub date -
Apr 15, 2016
filing date -
Apr 17, 2015
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Abstract
A method for digitizing a sensed signal in a digitally assisted current sense circuit and a digitally assisted current sense circuit that uses the disclosed method realize a simple way to sense and convert an analogue current signal into a digital signal. The method includes the steps of generating a voltage corresponding to a sensed inductor current IL; and amplifying and buffering the voltage for creating an input signal to be converted by an analogue-to-digital converter (ADC). The ADC uses an estimate of the inductor current provided by a modified digital observer circuit as a starting point for an analogue-to-digital conversion.
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