Transformer (Ideal 4-Port Transformer)

On This Page

On the Web

Name	Description	Units	Default
N	Turns ratio
ZRef	Reference impedance for all ports

N ≠ 0

Note

This component is obsolete for new designs. It is available only for compatibility with designs created with 2002C or earlier releases.

For new designs, use the TF transformer (Lumped-Components library).

Input pins are 1 and 3; output pins are 2 and 4.
The S-parameters of the component are determined as follows:
S₁₁ = S₂₄ = S₃₃ = S₄₂ = N² / (1 + N²)
S₁₄ = S₂₃ = S₃₂ = S₄₁ = −N / (1 + N²)
S₁₂ = S₂₁ = S₃₄ = S₄₃ = N / (1 + N²)
S₁₃ = S₂₂ = S₃₁ = S₄₄ = 1 / (1 + N²)
The input resistance R_IN output resistance R_OUT are related to N by:
This is a noiseless component.
Because it is an ideal transformer, the impedance transformation is the same at DC as it is at nonzero frequencies.
This component passes DC.