a gyrator includes a gyrator core and at least one common mode feedback circuit . the gyrator core includes four inverters mutually connected in a loop configuration between a pair of input ends and a pair of output ends . the common mode feedback circuit is provided between the pair of input ends and / or the pair of output ends and includes a forward - reverse connection inverter set and a backward - reverse connection inverter set . the forward - reverse connection inverter set has a first inverter , a second inverter connected in reverse series with the first inverter , and a first feedback resistor connected in parallel with the second inverter . the backward - reverse connection inverter set has a third inverter , a fourth inverter connected in reverse series with the third inverter , and a second feedback resistor connected in parallel with the fourth inverter .