Patent ID: 7786917

Claim:
A digital-to-analog converter comprising: a first switch capable of coupling a first circuit node to ground; a second switch capable of coupling a second circuit node to ground; a scaling capacitor coupled between the first and the second circuit node; a first array of capacitors coupled to the first circuit node; a first switching array coupled to the first array of capacitors opposite to the first circuit node and configured to selectively couple the first array of capacitors to either ground or a reference voltage; a second array of capacitors coupled to the second circuit node; and a second switching array coupled to the second array of capacitors opposite to the second circuit node and configured to selectively couple the second array of capacitors to either ground or the reference voltage; wherein the scaling capacitor has a capacitance value that equals a unit capacitance value, and wherein the second circuit node is coupled to an output terminal of the digital-to-analog converter.