Patent ID: 8653998

Claim:
A D/A conversion circuit comprising: a first D/A converting section which is connected with an output node; a first serial capacitor which is disposed between the output node and a first node; a second D/A converting section which is connected with the first node; and a control circuit which performs a switch control, wherein the first D/A converting section includes a first capacitor array section including a plurality of capacitors of which each one end is connected with the output node, and a first switch array section including a plurality of switch elements which are connected with the other ends of the plurality of capacitors of the first capacitor array section and are switch-controlled according to higher bits of input digital data, wherein the second D/A converting section includes a second capacitor array section including a plurality of capacitors of which each one end is connected with the first node, and a second switch array section including a plurality of switch elements which are connected with the other ends of the plurality of capacitors of the second capacitor array section and are switch-controlled according to lower bits of the input digital data, and wherein the control circuit performs the switch control for dynamically changing allocation of the capacitors to the respective bits of the input digital data, for the first switch array section of the first D/A converting section, the D/A conversion circuit further comprising: a second serial capacitor which is disposed between the output node and a second node; and a first sub-D/A converting section which is connected with the second node, wherein the first sub-D/A converting section includes a first sub-D/A capacitor array section including a plurality of capacitors of which each one end is connected with the second node, and a first sub-D/A switch array section including a plurality of switch elements which is connected with the other ends of the plurality of capacitors of the first sub-D/A capacitor array section.