Question: Stability of a general two-port amplifier circuit can be determined by the - parameter test of the scattering parameters (S S2 S2 S) of the transistor: 11 22 12 21 1-151 = > 1 IS-AS 1+1SS1 22 11 where A is the determinant of the scattering matrix A = S,S22 - S12 S 21 11 12 21 12 Show that for unilateral two-port amplifier device, where S = 0, the u-parameter test implies that |S| < 1 and IS2 < 1 for unconditional stability. -