How do you convert between ABCD parameters and impedance parameters?

Converting ABCD to impedance parameters:

Calculate the impedance parameters as follows:

Z11 = A/C

Z12 = (A * B - D * C) / C

Z21 = 1 / C

Z22 = D / C

Converting impedance to ABCD parameters:

Calculate the ABCD parameters as follows:

A = Z11 / Z21

B = (Z11 * Z22 - Z12 * Z21) / Z21

C = 1 / Z21

D = Z22 / Z21

These formulas allow you to convert between the ABCD parameters and impedance parameters. Note that ABCD parameters represent a two-port network in terms of voltage and current relationships, while impedance parameters describe the same network in terms of impedance relationships.