Question
A system has a gain of -20 dB . What is the equivalent magnitude value?(a) -0.1(b) 0.1(c) 1(d) -1
Step 1
For power quantities, the formula is: dB = 10 Ć logāā(Pā/Pā) For voltage or amplitude quantities, the formula is: dB = 20 Ć logāā(Vā/Vā) Since we're dealing with gain, which is a ratio of output to input, we'll use the amplitude formula. Show more…
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