Answer to Question #252208 in Electrical Engineering for Natalie

Question #252208

QUESTION 9

A three- stage amplifier circuit has first stage gain of 45dB, second stage gain of 50dB and 

third stage gain of -5dB. What is the overall gain? If input to the first stage is 0.1mV, what is 

the output of the final stage?



1
Expert's answer
2021-10-18T03:44:56-0400

Overall gain is

"=45+50-5=90dB\\\\\n10\\log{\\frac{V_o}{V_i}}=90\\\\\nV_i=0.1mV\\\\\nV_o=10^9\\times0.1mV=10^8mV"


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