| CPC H03M 1/0604 (2013.01) | 11 Claims |
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1. An analog-to-digital converter that converts an analog input to a digital converted value by repeating a conversion data generation operation by a conversion data generator, a potential generation operation by a capacitance DAC, and a comparison operation by a comparator for a resolution bit, the analog-to-digital converter comprising
a comparator operation signal generation circuit that predicts the time when a potential generated by the capacitance DAC becomes settled based on a charging or discharging time to a capacitance element whose characteristics are equal to those of the capacitance used in the capacitance DAC, and generates a comparator operation signal to allow the comparator to start the comparison operation, wherein
the comparator operation signal generation circuit predicts settling time of the capacitance DAC, which is different for each bit to be switched, based on each discharging time of the capacitance element charged with injection potentials.
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