# Make a Negated General Impedance Converter

A General Impedance Converter (GIC) looks like this:

Where

$$Z_{tot} = \frac{Z_1*Z_3*Z_5}{Z_2*Z_4}$$

But I need a circuit that gives me $$\ \frac{1}{Z_{tot}}\$$

How would I create a circuit that gives me $$\ \frac{1}{Z_{tot}}\$$ for Zin?

(Or something like $$\ Z_{in} = \frac{Z_2*Z_4}{Z_1*Z_3*Z_5}\$$)

The problem is if I put an inductor on this circuit, I can't select a series of impedance's Z_1 through Z_5 using only resistors and capacitors to end up with a combined impedance of 1.

• Hmm interesting. – Andy aka Jul 29 at 22:49
• So you want a general conductance converter (GCC?) – jonk Jul 30 at 0:23
• @VoltageSpike So you just need to insert a transconductance -- something that presents current at the output given voltage at the input. Like a BJT. ;) – jonk Jul 30 at 18:45
• @LvW I want to be able to reverse the impedance of an inductor, using only resistors and capacitors. So if I had an inductor on Zin, I could match the impedance with an inverse impedance. – Voltage Spike Jul 31 at 19:21
• ....and what is the unit for the "inverse impedance"? Is it capacitor? – LvW Aug 1 at 8:16