Stability condition of an amplifier is frequency independent and hence can be operated at any frequency.

Stability condition of an amplifier is frequency independent and hence

1.	Stability condition of an amplifier is frequency independent and hence can be operated at any frequency.
A.	True
B.	False
Answer» B. False

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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.
If the S parameters of a transistor given areS11=-0.811-j0.311S12= 0.0306+j0.0048S21=2.06+j3.717S22=-0.230-j0.4517Then ∆ for the given transistor is:
The condition for unconditional stability of a transistor as per the K-∆ test is │∆│> 1 and K
For any passive source termination ГS, Unconditional stability implies that:
If │S11│>1 or │S22│>1, the amplifier cannot be unconditionally stable.
By_performing_the_K-‚Äö√Ñ√∂‚àö‚Ä†‚àö√∫_test_for_a_given_transistor_the_values_of_K_and_‚Äö√Ñ√∂‚àö‚Ä†‚àö√∫_were_found_to_be_equal_to_0.383_and_0.334_respectively._The_transistor_with_these_parameters_has_unconditional_stability.$#
The condition for unconditional stability of a transistor as per the K-‚Äö√Ñ√∂‚àö‚Ä†‚àö√∫ test is ‚Äö√Ñ√∂‚àö√Ü‚àö√°‚Äö√Ñ√∂‚àö‚Ä†‚àö√∫‚Äö√Ñ√∂‚àö√Ü‚àö√°> 1 and K
For any passive source termination ‚Äö√Ñ√¨‚àö¬®S, Unconditional stability implies that:$
If ‚Äö√Ñ√∂‚àö√Ü‚àö√°S11‚Äö√Ñ√∂‚àö√Ü‚àö√°>1 or ‚Äö√Ñ√∂‚àö√Ü‚àö√°S22‚Äö√Ñ√∂‚àö√Ü‚àö√°>1, the amplifier cannot be unconditionally stable.$
For a unilateral device condition for unconditional stability in terms of S parameters is:

Stability condition of an amplifier is frequency independent and hence can be operated at any frequency.

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