Interonnections of Two-port Networks

Series Connection

(Series connection of two two-port networks N _a and N _b)

For network N _a,

For network N _b,

The condition for series connection is

Putting the values of V _1a and V _1b from Equation (10.62) and Equation (10.64),

Putting the values of V _2a and V _2b from Equation (10.63) and Equation (10.65) into Equation (10.67), we get

The Z-parameters of the series-connected combined network can be written as

where

or in the matrix form,

 

Parallel Connection

(Parallel connection of two two-port networks N _a and N _b)


For network N _a,

or

For network N _b,

Now the condition for paralel,

and

 Similarly,

The Y-parameters of the parallel connected combined network can be written as

$Y=Y_{N_a}+Y_{N_b}$

Cascade Cnnection

$A=A_1.A_2$

Source: http://www.globalspec.com/reference/71733/203279/10-10-interconnections-of-two-port-networks