| 摘要 |
A digital-to-analog converting circuit increases an absolute value of inputted digital data by a bit shift operation when minute digital data are inputted thereto. The shifted digital data are converted into an analog signal, and thereafter, such analog signal is attenuated in accordance with a shift value of the bit shift operation. The bit shift operation and the attenuation operation are performed when the value of the inputted digital data are smaller than a predetermined value for a predetermined time or more. Thus, a conversion accuracy of the minute digital data is raised, and a distortion generation depending on a frequently switching of the bit shift is avoided.
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