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ADVICE- equivalent circuit simulation/ design

Howdy,

 

 

Let me introduce myself. I am a research student, new with multisim. And I am looking at the possiblity of using multisim to simulate, initially an equivalnet circuit for a schottky diode. Modelling and fitting real world data to simulated data. With the rationale being that deviations from ideal diode(DC) I-V behaviour that have been observed in real world experimental IV characterisation can be understood and analysed/understood with respect to this simulation. These would likely include parasitic capacitances introducing, some time dependent RC circuits and interface effects. Could multisiim provide me the ability to do a parameter study on this? and similar effects?- The plan would be to cross examine through IV analysis. I am looking for a little hand in realising the potential of multisim in this area, and the approach that should be taken.

 

I have experimented with the DC oeprating point analysis, and parameter analysis and can see how some of the tools are there- but I'm really interested in creating an environment that will allow me to track these changes, dynamically through I-V representation.

 

Could someone perhaps provide me with a few pointers in realising this, and point me in the direction of an example that I could experiment with?

 

I am slightly hampered in circuit design from fundamentals.

 

many thanks and kind regards,

 

DC

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I suggest you look at the Arbitrary sources (also called ABM sources). They allow you to set a voltage or current output as a function of variables in the circuit and have support for a wide variety of functions and operators. They even supports Piece-Wise-Linear functions (using the table() function)

 

See Source>>CONTROLLED_CURRRENT_SOURCES>>ABM_CURRENT, Source>>CONTROLLED_VOLTAGE_SOURCES>>ABM_VOLTAGE. See their help file more info.

 

In the attached example you can see examples of a simple diode and an ideal capacitor which were created using the ABM_CURRENT sources.

 

 

 

ABM_snapshot.png

Max
National Instruments
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thank you for the reply. I'll have an investigate further.

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