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Calculate phase-gain margins, feedback factor of amplifier

An operational amplifier contains an open-loop transfer function explained as:

A(?) = (A0 (1 - j?τ2))/((1 + j?τ1)(1 + j?τ3))

Here: AO = 2 x 105, τ1 = 0.159 x 10-4 s and τ2 = 0.159 x 10-6 s as well as τ3 = 0.159 x 10-8 s.

The amplifier is configured like a negative feedback amplifier along with the feedback factor β = 0.005. Draw a Bode diagram showing the magnitude and phase of the feedback loop gain A(ω)β as functions of frequency. Find out whether or not the feedback amplifier configuration is stable. In that case stable, calculate the phase and gain margins of the amplifier. When not stable, find the frequency of oscillation as well as modification of the feedback factor that will make the amplifier stable.

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