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If the resistance value for phase compensation is fixed and the value of the capacitor for phase compensation is changed, what happens to the phase and the gain?
When the capacitor for phase compensation is modified, both the zero and the pole frequencies change, and so it is not possible to generalize about what will happen. The behavior also depends on internal parameters of the IC being used. For some ICs, ROHM Solution Simulator and SPICE models have been made public, and so it is recommended that simulations first be performed to check behavior.