Multiplication circuit

摘要

A multiplication circuit comprising a plurality of weighting circuit serially connected which comprises a plurality of switching means to which a common analog input voltage in inputted, the switching means being controlled by digital signals, a capacitive coupling with a plurality of capacitances each of which is connected to one of the switching means, an amplifier with high open gain to which an output of the amplifier is connected and a feedback capacitance connecting an output of the amplifier to an input. <IMAGE>