Given a source generator supplies 100 uV signal to two identical amplifiers with a 20 dB total gain to boost the signal delivered to the output device with 150 Ω resistance. All amplifiers are connected using a transmission line with 3 dB loss. Give solution in determining: 1. the input voltage of the stage 2 amplifier in dBV 2. the output voltage of the system in mV 3. the overall power in dBa Answers: -73dBV, 0.708mV, 30.24dBa

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Multistage Amplifier

The multistage amplifier is generally a voltage or power amplifier. The multistage amplifier has a number of single stage amplifier that are cascaded together. Since a single stage amplifier output is not useful, they are being replaced with multistage amplifiers or multistage transistor amplifiers. The multistage amplifier are used where the gain required is high or the input signal is very small such that only a single stage amplifier cannot amplify it.