| 摘要 |
PROBLEM TO BE SOLVED: To obtain output with resolution that is higher than that of a D/A converter in a digital - analog conversion circuit. SOLUTION: A D/A converter 10 having output terminals O1 and O2 is used, the output voltage of the two output terminals O1 and O2 of the D/A converter 10 is divided into a constant, specific ratio by resistors Ra and Rb, and the voltage is used as output. With this configuration, even if a voltage value to be divided is to be set to a ground DND, a power supply VDD of the D/A converter, a reference voltage Vref, or a voltage value other than a constant voltage part for using in other circuits, a desired voltage value may be outputted to the output of the D/A converter 10, thus eliminating the need for a constant voltage output element.
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