AM amplifier having noise figure of 20 dB and available power gain of – McqOptions

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1.	AM amplifier having noise figure of 20 dB and available power gain of 15 dB is followed by a mixer circuit having noise figure of 9 dB. The overall noise figure as referred to input in dB is
A.	10.44
B.	11.07
C.	21.52
D.	0.63
Answer» B. 11.07

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