Patent ID: 8493099

Claim:
A device, comprising: a plurality of sample and hold circuits, each comprising: an input stage amplifier circuit that amplifies an input signal; a hold circuit that holds an output signal of said input stage amplifier circuit with a sampling clock signal as a trigger; and a first bias current switching circuit that switches a bias current of said hold circuit to a first other circuit that is functionally independent of said each sample and hold circuit, when said hold circuit is in a hold period, to supply said first other circuit; wherein: each of said sample and hold circuits is made to perform a time interleaving operation; a single bias current source for a hold circuit is provided to be shared as a bias current source of each of said hold circuits that perform an interleaving operation; and said first bias current switching circuit switches a bias current of said bias current source for each said hold circuit in a time-wise manner, to supply said bias current as a bias current of each of said hold circuits.