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(Solved): A diagram of a sinusoidal oscillator is shown below. The amplifier has infinite input impedance and ...
A diagram of a sinusoidal oscillator is shown below. The amplifier has infinite input impedance and zero output impedance. If the frequency of oscillation is 2 kHz, calculate the magnitude and phase of the amplifier voltage gain A(w) at the oscillation frequency. Hint: An oscillator is just a feedback amplifier with a phase margin of 0 degrees.
3. A diagram of a sinusoidal oscillator is shown below. The amplifier has infinite input impedance and zero output impedance. If the frequency of oscillation is , calculate the magnitude and phase of the amplifier voltage gain at the oscillation frequency. Hint: An oscillator is just a feedback amplifier with a phase margin of 0 degrees. Note: Resistor labels are in ohms.
Expert Answer
Let us assume that the amplifier used in the given question is Op-amp.Basic/Concept:- So let us have a few assumptions: 1. Consider that the given Op amp is ideal as the input is drawing no current.2. Virtual short or Virtual ground due to ideal op amp i.e. infinite open loop gain, output impedance is zero, the input impedance is infinite. Laplace Transform:-