Transmission zeroes

Generally, in a two-port network, for a finite input, there exists an output.

Transfer functions with both zero and infinite frequency can be found in band-pass filters.

Combination of elements may prevent input from reaching the output by 'shortening' or 'opening' all transmission path by means of serial or parallel reasonance.

The circuit depicted to the left, based on a GIC (generalized impedance converter), has finite non-zero transmission zeroes.

[1]: 304–308 The filter circuit to the right has the following transfer function: This circuit produces transmission zeroes at A few procedures can be followed for realizing passive two-ports with transmission zeroes.

A GIC (generalized impedance converter) based circuit that has finite non-zero transmission zeroes. [ clarification needed ]
A state variable filter derivation that has transmission zeroes under the condition that R1/R4 = R7/R6.