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The RF amplifier A is having 3 dB NF & 5 dB ofgain, amplifier B is having 3.5 dB NF & 15 dB. For overall noise figure of the cascaded system, the correct statementis :
A as first stage & B as second stage offers minimum overall NF
B as first stage & A as second stage minimum over all NF
Both the combination will offer same overall NF
Overall NF will be less than 3 dB.
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