A radio receiving system incorporates an amplifier that has a gain of 26 dB. The receiver contributes an additional 3.84 pW of noise. The input delivers a signal power of 1 nW to the amplifier. If the available noise power from the input is -110 dBm. Determine (i) the input Signal-to-Noise ratio (SNR) in dB. (ii) the output Signal-to-Noise ratio (SNR) in dB. (iii) the noise factor and noise figure.

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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.