Find the stability and the gain of the circuit

Discussion in 'General Electronics Chat' started by nepdeep, Oct 31, 2012.

  1. nepdeep

    Thread Starter Member

    Sep 14, 2011
    139
    0
    Hi, I have been working on this project ....
    Let me describe the circuit so far...
    This is kind of load tranisent tester by linear...
    I am developing the similar electric load...but with capabiltiy of higher slew rate and high current at low voltage...
    at least 5A/us, at 0.5 volt and current of 22[A] at the same condition...
    I have been able to estimate that the current as high as 22[A], at 0.5[V] is possible...from the calucation and the simulation....
    Now I want to find the stability of the circuit...is the slew rate able to met...do i find the stability by finding the transfer funciton ?? or is there is any other method...Help pplease!! stability calculation.jpg

    I want some guidellines and tips...or similar examples...
     
  2. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
    507
    Do you mean the phase margin?

    Build it up and test it with a network analyzer.

    Page 2:

    http://www.ti.com/lit/an/snva246/snva246.pdf
     
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  3. nepdeep

    Thread Starter Member

    Sep 14, 2011
    139
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    Yes, something like that...but the phase margin...satbility and the ringin in the texas document is related to the voltage regulator....I want to test the stability of the "not voltage regulator" but the device that can test the voltage regulator...an electric load
     
  4. bountyhunter

    Well-Known Member

    Sep 7, 2009
    2,498
    507
    Any electronic system with a closed loop is tested in a similar way. You break the loop open, inject a signal and measure the difference in gain above and below the injection node.
     
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  5. nepdeep

    Thread Starter Member

    Sep 14, 2011
    139
    0
    Thanks...page 3 helped me much more to understand basic topologies..now beginning with the detailed appraches...thanks!!!
     
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