Revision as of 19:18, 6 January 2023 edit 67.220.2.90 (talk) →Charge-redistribution successive-approximation ADC Tag: Reverted ← Previous edit		Revision as of 04:38, 7 January 2023 edit undo Em3rgent0rdr (talk \| contribs) Extended confirmed users 7,995 edits m →Charge-redistribution successive-approximation ADC: typo: surely the last editor meant "from" instead of "frond" Tags: Reverted Visual edit Next edit →
Line 48: # All of the capacitors within the array are switched to the input signal {{math\|''V''<sub>in</sub>}}. The capacitors now have a charge equal to their respective capacitance times the input voltage minus the offset voltage upon each of them. # The capacitors are then switched so that this charge is applied across the comparator input, creating a comparator input voltage equal to {{math\|−''V''<sub>in</sub>}}. # The actual conversion process proceeds. First, the MSB capacitor is switched ~~frond~~from ground to {{math\|''V''<sub>ref</sub>}}, which corresponds to the full-scale range of the ADC. Due to the binary-weighting of the array, the MSB capacitor forms a 1:1 charge divider with the rest of the array. Thus, the input voltage to the comparator is now {{math\|−''V''<sub>in</sub> + {{frac\|''V''<sub>ref</sub>\|2}} }}. Subsequently, if {{math\|''V''<sub>in</sub>}} is greater than {{frac\|''V''<sub>ref</sub>\|2}}, then the comparator outputs a digital 1 as the MSB and the capacitor remains connected to {{math\|''V''<sub>ref</sub>}}, otherwise it outputs a digital 0 as the MSB and the capacitor is switched back to ground. Each capacitor is tested in the same manner until the comparator input voltage converges to the offset voltage, or at least as close as possible given the resolution of the DAC. === Use with non-ideal analog circuits ===

Successive-approximation ADC: Difference between revisions