ES 3: Introduction to Electrical Systems

The voltage gain of an amplifier is simply the ratio of the output signal voltage to the input signal voltage: Eq. 1. In electrical engineering, gain is often expressed in decibels (dB). The gain in dB is found by taking log10 of the ratio in Eq. 1 and multiplying by 20: Eq. 2. Notice that if vout=vin, then the gain is AV = 1 (v/v) = 0 dB. ................
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