| 摘要 |
A D/A converter circuit has at least two multiple-bit type D/A converters connected in parallel with each other. The circuit also includes a random signal generation circuit that generates a random signal voltage having a voltage value that timewise, randomly changes at each sampling cycle. The random signal voltage is added to and subtracted from a digital signal to be inputted to the at least two D/A converters. As a result, offset voltages whose sum is zero are added to the digital signals to be inputted to the D/A converters. The signals are D/A converted by the plurality of D/A converters to provide analog outputs, which are then added together by an analog adder.
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