Patent ID: 6853324

Claim:
A digital-to-analog conversion circuit of charge distribution type comprising: a plurality of capacitors having respective capacitances that increase in a sequential order, one end of the capacitors being commonly connected electrically; a plurality of analog switches each for selectively, electrically connecting one of first and second reference potentials corresponding to a digital signal inputted from outside to the other end of a corresponding capacitor, the digital-to-analog conversion circuit outputting an analog signal corresponding to a potential at the commonly connected one end of the capacitors, wherein the plurality of analog switches have respective driving capacities that increase in a sequential order, and wherein the driving capacity of each analog switch is set according to a maximum connection capacitance of the analog switch, namely a combined capacitance of the plurality of capacitors to be obtained in a state in which only the analog switch is connected to one of the first and second reference potentials with the remaining analog switch or switches being connected to the other of the first and second reference potentials such that a ratio of the driving capacities of the plurality of analog switches is equal to a ratio of the corresponding combined capacitances.