| 摘要 |
Disclosed is a decoder, receiving the first and the second reference voltage groups and selecting a reference voltage in accordance with a received digital signal, including a first sub-decoder receiving the first reference voltage group, a second sub-decoder receiving the second reference voltage group 20B, and a third sub-decoder receiving a reference voltage selected by the second sub-decoder and outputting the selected reference voltage to the first sub-decoder or an output terminal of the decoder. The first sub-decoder includes a transistor of a first conductivity type having a back gate supplied with a first power supply voltage, the second sub-decoder includes a transistor of the first conductivity type having a back gate supplied with a second power supply voltage, and the third sub-decoder includes a transistor of the first conductivity type having a back gate supplied with a first power supply voltage.
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