Reference no: EM13138815
Analysis of bandwidth of an amplifier and output power signa
An audio amplifier has the following frequency response (transfer function):
At 20 Hz, gain = 30 dB.
At 60 Hz, gain = 37 dB.
At 120 Hz, gain = 40 dB.
At 10,000 Hz, gain = 40 dB.
At 12,000 Hz, gain = 37 dB.
At 16,000 Hz, gain = 30 dB.
The gain of the amplifier is constant from 120 Hz to 10 kHz at 40 dB.
a. What is the 3 dB bandwidth of the amplifier, in Hz?
b. What is the 10 dB bandwidth of the amplifier in Hz?
c. A 1 kHz sine wave signal with a power level -10 dBm is applied to the input of the amplifier. What is the power at the amplifier output in dBW?
d. A 12 kHz sine wave signal with a power level -25 dBm is applied to the input of the amplifier. What is the power at the amplifier output in dBm?
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