If │S11│>1 or │S22│>1, the amplifier cannot be unconditionally – McqOptions

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1.	If │S11│>1 or │S22│>1, the amplifier cannot be unconditionally stable.
A.	True
B.	False
Answer» B.

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By performing the K-∆ test for a given transistor the values of K and ∆ were found to be equal to 0.383 and 0.334 respectively. The transistor with these parameters has unconditional stability.
The condition for unconditional stability of a transistor as per the K-∆ test is │∆│> 1 and K<1.
For any passive source termination ГS, Unconditional stability implies that:
If │S11│>1 or │S22│>1, the amplifier cannot be unconditionally stable.