# Solved Problems-7

Problems-7

Calculate the

*T*-parameters for the block*A*and*B*separately and then using these results, calculate the*T*-parameters of the whole circuit shown in the figure. Prove any formula used.Solution

- We consider the given network as a cascade connection of two networks as shown.

*For Block A:*

Opening the port-2,

By KCL,

and

Solving for

*V*_{1}and*V*_{2},*V*

_{1}=

Short-circuiting port-2,

âˆ´

*I*_{1}=and

*V*_{1}=and

*D*=_{a}*For Block B:*

Opening the port-2,

By KCL,

and

Solving for

*V*_{1}and*V*_{2},*V*

_{1}=

Short-circuiting port-2,

âˆ´

*I*_{1}=and

*V*_{1}=and

*D*=_{b}Since the two networks are connected in cascade, the overall transmission parameter matrix is obtained as,

[

*T*] = =- [Same as Prob. (a)]

Here, [

*T*] =_{a}âˆ´ [

*T*] =