- Consider The Following Simple Amplifier Noise Model Gain G Wong Uns Rs 1 Rin Noise Noisy Free Amp Amp Where We Had It 1 (46.49 KiB) Viewed 35 times
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Consider the following simple amplifier noise model: gain, G WONG Uns Rs 1 Rin noise noisy free amp amp where we had It can be shown that the total input noise density of the amplifier is: v = v2R, + vih, a + CR} n, is the Johnson noise of the source resistance, given by vo , Re = 4KT R., and V1, alin, are the intrinsic voltage/current noise densities of the amplifier. Assuming R, is an ideal resistor, so you can calculate vexactly, explain briefly how you could , measure the two different types of amplifier noise. [Hint: Assume you have measured the amplifier gain, G. and can measure the noisy output voltage signal using a scope. You may also assume that you can vary Rs controllably, e.g., by adding extra resistance in at the voltage source.]