provide a well written solution on a plain white paper 

 

Question : Stability of a general two-port amplifier circuit can be determined by the parameter test of the scattering parameters (S,S S,, S,,) of the transistor: 11' 22'"12' 21- 1-1S,, > 1 IS-AS,, +IS,S 22 11 12 21 where A is the determinant of the scattering matrix A S22 12 21 Show that for unilateral two-port amplifier device, where s,, = 0, the u-parameter test implies that IS,,I < 1 and |Sl < 1 for unconditional stability. 12 22