An amplifier circuit has a gain of 85 dB. If the magnitude of the input voltage

Question

An amplifier circuit has a gain of 85 dB.  If the magnitude of the input voltage to the amplifier is12 mV, what is the output voltage magnitude?    dir="ltr" data-font-name="times" data-canvas-width="263.97760000000005"> An amplifier circuit has a gain of 85 dB.  If the magnitude of the input voltage to the amplifier is12 mV, what is the output voltage magnitude?   

Explanation / Answer

Gain = 20 log ( Vout/Vin )

85 = 20 *log (Vout/12)

4.25 = log (Vout/12)

10^4.25 = Vout/12

Vout = 12*17782.79 = 213393.52 mV = 213.39 V -------ANSWER

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