AMPLITUDE LIMITER CIRCUIT AND FILTER CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a filter circuit using a transconductance amplifier assuring a stable operation even when a voltage amplitude of the input signal is large. SOLUTION: A filter circuit has a filter circuit body having a transconductance amplifier in at least an input stage; and an amplitude limiter circuit in which the amplitude of an input signal is limited to within a dynamic input range of the filter circuit body to input to the filter circuit body.