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Open-Loop Magnitude Crossover Frequency
The open-loop magnitude crossover frequency, which is also known as crossover frequency, is the frequency at which the magnitude of the open-loop response is zero dB. Here the open-loop gain is equal to one. The open-loop magnitude crossover frequency is used to calculate the phase margin. The first open-loop magnitude crossover frequency, where the magnitude initially moves from positive to negative values, is an indication of dynamic performance. Here a higher initial crossover frequency corresponds to a higher servo-loop bandwidth and a faster rise time.
