Abstract: An impedance multiplier circuit comprises an input impedance having a certain value of impedance and a circuit coupled to this input impedance for multiplying its value by a multiplication factor. This multiplying circuit comprises a first and a second voltage follower amplifier and a first and a second scaling impedance. The input impedance is coupled between the input of the first voltage follower amplifier and the output of the second voltage follower amplifier with the first and second scaling impedances establishing a voltage division between the output of the first voltage follower amplifier and the input of the second voltage follower amplifier. In this way, the second voltage follower amplifier provides active negative feedback, and effectively multiplies the input impedances's impedance by a factor of one plus the quotient of the second scaling impedance to the first scaling impedance.