To provide a transversal filter suitable for acceleration of waveform equalization.

Circuit block 11a-11d in the same configuration are composed of four pieces of sample/hold circuits SH composed of switches to be turned on in phases of numbers in a box by controlling ON/OFF by the pulses of 16 phases, capacitors C and buffers, a coefficient adder 12 composed of an operational amplifier and a resistor, eight pieces of switches for deciding the connection between the outputs of the sample/hold circuits SH and the input of the coefficient adder 12, and output switch for deciding the connection between the output of the coefficient adder 12 and an output terminal OUT. The switch at each circuit block is turned on/off every four clocks except the output switch, and the timing of each switch is controlled while being shifted clock by clock for each circuit block. The outputs of respective circuit blocks are successively outputted at intervals of one clock. Each circuit block is operated every 4T while being shifted by a clock period T and when the respective block outputs are successively sampled at intervals of the period T and resultant inputs are successively transferred with the delay element T, the transversal filter of three taps can be provided.