Answer to Question #298662 in Electrical Engineering for Ezz

Question

1 The signal input power to a receiver is 6.2 nW. The noise power is 1.8 nW. What is the S/N ratio? What is the S/N ratio in decibels? 

2. The circuits in a superheterodyne receiver have the following gains: RF amplifier, 8 dB; mixer, -2.5 dB; IF amplifier, 80 dB; demodulator, -0.8 dB; audio amplifier, 23 dB. What is the total gain?

Answer 1

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