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nodal potential modified method ???

Discussion in 'Electronic Basics' started by gooliver, May 16, 2005.

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  1. gooliver

    gooliver Guest

    what's the method in object?

    I know the nodal potential method for a electrical
    network linear time-invariant... but I've read than
    the nodal potential modified method is the method which
    SPICE use for the solution...

    ------ ------ ------ ------
    thanks for suggestions
  2. Don Kelly

    Don Kelly Guest

    Nodal vs loop solutions generally mean fewer equations to solve. In
    addition, it is relatively easy to input circuit data from a table and the
    process is well suited to a standard algorithm to build the admittance
    matrix. (loop analysis requires making choices -not so good for the idiot
    box and not standardised for every circuit).
    As long as the circuit is linear- no problem. If non-linear, then it becomes
    a step by step situation- solve a linear model, modify for non-linearities
    and repeat until, hopefully, convergence occurs.
    I've not used SPICE but I expect that the above are the basic reasons for
    its use.

    I do know that nodal analysis is the standard for power system load flows
    and stability studies which are larger than anything that SPICE would be
    expected to handle (often several thousand non-linear simultaneous
    equations for the load flow and for stability, this is done at each step of
    the solution of a large set of non-linear differential equations)
  3. You should rectify that problem. Spice is wonmderfull.
    Spice is used to solve circuits with milions of transisters.

    Kevin Aylward
    SuperSpice, a very affordable Mixed-Mode
    Windows Simulator with Schematic Capture,
    Waveform Display, FFT's and Filter Design.
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