To suppress an influence of a transient phenomenon arising from movement of charges on output.
A filter circuit includes a transconductance amplifier 102 that converts a voltage signal input to an input end to a current signal, a capacitor group that includes a plurality of capacitors, where the current signal output from the transconductance amplifier 102 is sequentially input to each capacitor at each cycle, share switches S1aS to S4aS, S1bS to S4bS that connect a set of capacitors to which the current signal is input with each other and adds charges accumulated in the set of capacitors together, and dump switches S1aD to S4aD that connect at least one capacitor of the set of capacitors to an output end after charges are added by the share switches S1aS to S4aS, S1bS to S4bS.
YOSHIZAWA ATSUSHI
Tetsuo Kanamoto
Koji Hagiwara
Kazuki Matsumoto