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The role of the filter in the voltage and current feedback circuit.

Hardware design
February 3, 2021 by Micah 68

This is a filter in voltage feedback, but how to analyze the function of this filter? What type of filter is it?

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Michelle Posted on February 3, 2021

Are you not a voltage loop?

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  • Micah

    Micah Posted on February 3, 2021

    It is a voltage loop, just want to ask, how to analyze the filter circuit formed by the amplifier on the left side of the voltage loop? What kind of filter is it?

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Jenna Posted on February 3, 2021

Is this PI adjustment?

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  • Micah

    Micah Posted on February 3, 2021

    It is a PI regulator, but I understand that the integral circuit constitutes a low-pass filter. The feedback components are only C24 and R47. When the corner frequency is C24*R47, the gain drops to 1. At low frequencies, the op amp is almost open-loop operation, and the gain is very high. .

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Colin Posted on February 3, 2021

Which is the filter? Isn't that a voltage loop and a current loop?

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