Wednesday, September 29, 2010

Modeling a VCVS in LTSpice



The ideal model for a VCVS (voltage controlled voltage source) is shown below:



Modeling a VCVS in LTSPice is pretty simple using the "voltage dependent voltage source" component in LTSpice. This component is called "e" in the symbol library. The symbol as inserted into LTSpice is shown below:



A VCVS amplifer with the following specifications is shown below:
Rin = 1k ohm
A = 50
Rout = 100k ohm
Rsrouce = 1k ohm
Rload = 100 ohm



Notice we use a standard voltage source (Vs, "voltage" component in LTSpice") connected to our VCVS. The source resistance, input resistance, output resistance, and load resistance are all represented in the schematic.
at

2 comments:

  1. UnknownMay 27, 2017 at 11:39 PM

    wondering why you wrote this.
    totally unuseful.
    what is the meaning of E parameters?
    SPICE MODEL
    VALUE
    VALUE2
    SpiceLine
    SpiceLine2

    thanks

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  2. AndyMay 7, 2018 at 9:38 PM

    Thanks James for your very useful blog on this.

    First example I found with a diagram of how this component is used.

    For the last comment (for attributes that weren't even mentioned in the blog) try googling "Spiceline2".

    Cheers
    Andy

    ReplyDelete