A wide range fine tuning capacitance multiplier

Abstract

A new circuit solution for capacitance multiplication that allows a wide range fine tuning is proposed. The basic idea of the circuit is to control a capacitor current multiplication with a strongly unbalance induced into a VGS loop of a current mirror. For the tuning a DC current is injected into a resistor to create that unbalance. The inherent DC component of the output current is rejected using a replica circuit.