Consider a high-temperature (70C) two-stage amplifier where the first stage has a gain of 12 dB and

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Question:

Consider a high-temperature (70◦C) two-stage amplifier where the first stage has a gain of 12 dB and the second stage has a gain of 20 dB. The noise figure of the first stage is 3 dB and the second stage is 6 dB. The amplifier has a bandwidth of 100 MHz. 10log10(kBT) + 30 is in dBm. Check: 10log10(k*1*273) + 30 = -174dBm, natural noise floor for 1Hz…

(a) What is the noise power presented to the amplifier in 100 MHz?

(b) What is the total gain of the amplifier?

(d) What is the total noise figure of the amplifier?

(e) What is the noise power at the output of the amplifier in 100 MHz?