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  1. #1
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    type 1 compensation in voltage regulators

    So I was reading an app note from Microsemi and came across a schematic for type 1 compensation using an opamp RC integrator.

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    So I wanted to know if this arrangement is right. Wouldn't you need a DC feedback resistor between the output and input to provide a DC path and regulate the DC voltage at the output? Or is it ok to not have a feedback resistor if the integrator itself is a part of the feedback loop?

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    Re: type 1 compensation in voltage regulators

    Correct. The compensator is a part of the total system that includes DC feedback.


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    Re: type 1 compensation in voltage regulators

    As noted, the regulator feedback loop is DC.
    Zapper
    Curmudgeon Elektroniker


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    Re: type 1 compensation in voltage regulators

    The capacitor in feedback path offers infinite impedance at DC. That means you have Infinite Gain (Gain = - Zfb/Zin) at DC. In order to limit this DC gain you need a parallel resistor with capacitor.
    Otherwise The DC gain will be limited only by the leakage impedance of the circuit.


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    Re: type 1 compensation in voltage regulators

    Thanks for the help guys. question is answered, thread can be put as solved.



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    Re: type 1 compensation in voltage regulators

    Hi,

    thread can be put as solved.
    Then do so....just by pressing the "Mark as solved" button below.

    Klaus
    Please don´t contact me via PM, because there is no time to respond to them. No friend requests. Thank you.



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    Re: type 1 compensation in voltage regulators

    Quote Originally Posted by KlausST View Post
    Hi,


    Then do so....just by pressing the "Mark as solved" button below.

    Klaus
    done, thanks



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