PURPOSE: To attain easily circuit integration by providing a sample-and-hold circuit, a delay circuit and a weight coefficient generator so as to decrease the number of capacitors even if the number of kinds of filter characteristic variation is increased.

CONSTITUTION: A voltage sampled and held by the sample-and-hold circuit 1, a signal delaying the voltage by one sampling period at delay circuits 5', 6', an output voltage delayed by one sampling period during operation and a signal delayed by one sampling period at a delay circuit 7' control charges passing through capacitors CA-1∼CA-5 with 1 or 0 of weight coefficients (a)∼(e) from the weight coefficient generator 16. The charges passing through the capacitors CA-1∼CA-5 are transferred to a capacitor CB at the same time and summed. Thus, the characteristic variable switched capacitor filter is obtained. In varying the characteristic of the circuit, since the number of capacitors is less, and the capacitors CA, CB only are to be noted for the capacitance value, the circuit integration is attained easily.