![]() ![]() For example: A 100 watt audio amplifier has a power gain ratio of 30dB. The output power has fallen to half the maximum or mid band power.įigures often quoted on attenuators designed to reduce the outputs on signal generators by measured amounts. We could also, if we so wished, convert this amplifiers decibels value back into a linear value by first converting from decibels (dB) to a Bel remembering that a decibel is 1/10th of a Bel. The output voltage has fallen to 0.707 of the maximum (mid band) output.ī. 1 Answer Sorted by: 5 The magnitude of signal lets say a, such that 0
â3dB Commonly used for limits of bandwidth in amplifiers, indicating the points where:Ī. âdB The
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