Current measurement circuit and measuring method thereof including a binary weighted capacitor array
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United States of America Patent
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Mar 26, 2013
Grant Date -
Dec 9, 2010
app pub date -
Apr 29, 2010
filing date -
Jun 5, 2009
priority date (Note) -
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Abstract
A current measurement circuit for measuring a current is provided. The current measurement circuit includes a current integrating unit with a capacitor array, a comparator coupled to the current integrating unit, and a control unit coupled to the comparator and the current integrating unit. The current integrating unit integrates the current on the capacitor array to obtain an input voltage. The comparator compares the input voltage with a specific voltage to generate a compare output. The control unit generates a control signal to apply to the capacitor array of the current integrating unit according to the compare output. A magnitude of the current is obtained according to the control signal and the capacitance of the capacitor array.
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