| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a D/A converter for accurately generating an analog output voltage regardless of accuracy of a reference voltage. Ž<P>SOLUTION: A reference voltage generating circuit 51 generates a reference voltage Vref. A D/A converting circuit 52 converts a digital input value Din into an analog output voltage Vout in accordance with the reference voltage Vref. An actual measurement storage circuit 53 stores an actual measurement value of the reference voltage Vref beforehand and outputs the stored actual measurement value. Since a user of a D/A converter 50 can obtain the actual measurement value of the reference voltage Vref corresponding to a voltage value of the reference voltage Vref during D/A conversion, by supplying as a digital input value Din of the D/A converting circuit 52 a digital value with the actual measurement value of the reference voltage Vref from the actual measurement storage circuit 53 as a radix, the analog output voltage Vout can be accurately generated regardless of accuracy of the reference voltage Vref. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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