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A signal passes through three cascaded amplifiers, each with a 5 dB gain. The word cascade means that the output of the first amplifier
A signal passes through three cascaded amplifiers, each with a 5 dB gain. The word "cascade" means that the output of the first amplifier is fed directly into the input of the second amplifier, and the output of the second amplifier is fed into the input of the third amplifier. The power at the output of the third amplifier is +2 dBm. (a) What will be the power in Watts and in dBms at the input of the first amplifier? (b) What is the overall gain, as the ratio of the power at the output of the third amplifier to the power at the input of the first amplifier? (c) What will be the overall gain in the system in dBs?
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Mobile Communications
Authors: Jochen Schiller
2nd edition
978-0321123817, 321123816, 978-8131724262
