Importance

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Abstract

A DAC whose area is held down and a semiconductor device using the DAC are fabricated. A D/A conversion circuit is disclosed, including n resistors A.sub.0, A.sub.1, . . . A.sub.n-1, n resistors B.sub.0, B.sub.1, . . . , B.sub.n-1, two power-supply voltage lines, a power-supply voltage line L and a power-supply voltage line H, maintained at potentials different from each other, n switches SWa.sub.0, SWa.sub.1, . . . , SWa.sub.n-1, n switches SWb.sub.0, SWb.sub.1, . . . , SWb.sub.n-1, and an output line, wherein, by n-bit digital signals inputted from the outside, said n switches SWa.sub.0, SWa.sub.1, . . . , SWa.sub.n-1 and said n switches SWb.sub.0, SWb.sub.1, . . . , SWb.sub.n-1 are controlled, and, from the output line, an analog gradation voltage signal is outputted.

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First Claim