ANALOG DIGITAL CONVERTER FOR REMOVING MEMORY EFFECTS

摘要

An analog to digital converter removing a memory effect is provided to reduce power consumption by sharing an operational amplifier composed of a plurality of input terminals. A pipeline analog to digital has the multiple stages in which a sample mode and a hold mode are alternated. A folded-cascode amplifier including a cascode amplifier is applied in a pair of stages among the plurality of stages. In the pair of stages, the input terminal of the folded-cascode amplifier is connected when the state with high significance is in a hold mode and the input terminal of the cascode amplifier is connected when the stage with low significance is in the hold mode.