Capacitance multiplier

A capacitance multiplier is an electronic circuit whose capacitance is many times higher or lower than the capacitance of the capacitor installed in it, so that a capacitor is formed on the other capacity. Is so as to form the higher the capacitance C is a multiplication of an existing capacitance Cc by a constant factor k:

The capacitance multiplier is thus in the ideal case, a positive impedance converter (PIC).

It can be used with the current amplification factor β is a bipolar transistor as a multiplier Q:

Alternatively, an operational amplifier with the following equation are used:

Capacitance multiplier are, for example, to produce a highly stable DC voltage with little effort, with some non-ideal characteristics of a capacitor omitted.