As design mannered null graduation voltage of the Drive circuit of the DA converter

摘要

PROBLEM TO BE SOLVED: To provide a D/A converter which is configured with small footprint and stably outputs multi-level voltages.;SOLUTION: A D/A converer includes: a voltage generating circuit which generates a plurality of reference voltages, as gradation voltages, utilizing a voltage drop of resistors; a first control circuit which selects any one of the reference voltages as a first output; a second control circuit which selects a reference voltage adjacent to a gradation voltage corresponding to the first output as a second output; and a third control circuit which includes first resistor, second resistor, third resistor and fourth resistor connected in series between the first output and the second output, a first switch means connected in series to the second resistor, and a second switch means connected in series to the third resistor, divides voltages of the first output and the second output and selects a result of the voltage division as a third voltage.;COPYRIGHT: (C)2007,JPO&INPIT