ORCAD Spice and Audio Transformer

Discussion in 'General Electronics Chat' started by mbird, Mar 6, 2009.

  1. mbird

    Thread Starter Member

    Jan 29, 2009
    Hi --

    I wanted to learn (just hobby/fun) about using an audio transformer.

    Two questions please...

    1.) I am using OrCad demo 16 to simulate before I build on the breadboard. When I set up the circuit it complains that R6 is floating. I have attached the full schematic. Is this the right way to do an audio transformer in OrCad?

    2.) I am using XFRM_Linear/Analog component. How do I make it so this component is like a 500Ω:8Ω transformer. I can edit the PSpice model but I am not sure what values to use.

    Thank you!!!
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  2. ifixit

    Well-Known Member

    Nov 20, 2008
    Spice doesn't like floating nodes. One solution is to ground one side of R6 directly, or thru a resistor of high value to simulate leakage.