Vout = 500 mV, and Vin = 1.3 V. The ratio Vout/ Vin expressed in dB is__________?
Correct answer: C. -8.30 dB
- A. 0 dB
- B. 8.30 dB
- C. -8.30 dB
- D. 0.8 dB
Explanation
Voltage gain in decibels is 20 log10(Vout/Vin) = 20 log10(0.5/1.3) ≈ -8.30 dB. The negative sign indicates that the output is smaller than the input.
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