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Capacitor, inductor and resistor - Poles and zeros

Discussion in 'Electronic Basics' started by Dummy, Sep 11, 2003.

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  1. Dummy

    Dummy Guest

    What are the roles of capacitor, inductor and resistor in creating
    poles and zeros in an amplifier circuit for stabilization? Resistor
    creates zero but capacitor and inductor create poles? How does the
    addition of zero could increase the phase margin?

    If we want to cascade two amplifiers, is there a need to design
    matching network? Or it's enough to put the coupling capacitor between
    two stages.
  2. Jim Thompson

    Jim Thompson Guest

    You are WAY over your head. Read the textbook.

    ...Jim Thompson
  3. If you think of frequency response of a circuit as a two dimensional
    rubber surface stretched over the S plane (+ and - sinusoidal
    frequency in one direction and exponential frequency (decay and build
    up) in the other, the points that have infinite response are referred
    to as poles (as if the sheet were passing over an infinitely tall tent
    pole at that point) and at points where the response is zero, are
    referred to as zeros (as if the rubber sheet were thumb tacked down at
    those points).

    That is my run on sentence for the day.

    The circuit elements that can be combines to produce poles and zeros
    are many and varied, especially when you include gain elements. Your
    generalities are wrong. I know of no such simple generalities to
    replace them.
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