11.5. Frequency Response of the Operational Amplifier and Resistor Feedback Amplifier
The MOSFET has a number of capacitances, including those associated with the gate structure and source and drain pn junctions as well as other parasitic capacitors of the transistor and the circuit. Therefore, the open-loop opamp will tend to be unstable due to the poles and zeros associated with the capacitors. Opamps are usually stabilized with the addition of a capacitor. The added pole is well below the lowest naturally occurring pole. This pole will dominate the frequency response of the opamp. In a lab project, the pole frequency will be measured.
We will obtain the frequency response of the feedback amplifier based on the single-pole response. The form ...
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