Integrator model in LTSpice

Discussion in 'General Electronics Chat' started by anuragn, Jun 17, 2009.

  1. anuragn

    Thread Starter New Member

    Jun 17, 2009
    2
    0
    Dear Friends,

    I need to prepare a model in LTSpice that can solve differential equations.
    I looked into the LTSpice help, and there is only one function "idt" available in Arbitrary behavioral Source.

    Is this the only function available in LTSpice for integration or there are any other specific integrator block that can help in solving differential equations.

    Thanks.

    Anurag
     
  2. anuragn

    Thread Starter New Member

    Jun 17, 2009
    2
    0
    I am also having problem in using syntax for idt. What is the correct syntax with intial condition ? Could anyone please let me know ?

    Thanks,

    Anurag
     
  3. Papabravo

    Expert

    Feb 24, 2006
    10,142
    1,790
    Don't know about the behavioral model. An Integrator is easy to make with an opamp. There is a capacitor in the feedback path from the output to the summing junction, and resistors from the input to the summing junction. This has the advantage of being buildable when the simulation is done.

    Check out the following online slide show

    http://www.wisc-online.com/objects/index_tj.asp?objID=SSE5303
     
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