1.

For a three stage cascaded amplifier, having gains of G1, G2 and G3 and noise figures of F1, F2, F3 the overall noise figure

A. <img src="/_files/images/electronics-and-communication-engineering/communication-systems/505-230-1.png">
B. <img src="/_files/images/electronics-and-communication-engineering/communication-systems/505-230-2.png">
C. <img src="/_files/images/electronics-and-communication-engineering/communication-systems/505-230-3.png">
D. None of the above
Answer» B. <img src="/_files/images/electronics-and-communication-engineering/communication-systems/505-230-2.png">


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