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Simulators >> Circuit Simulators >> controllable value
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Message started by schaedel on Oct 24^th, 2013, 4:28am

Title: controllable value
Post by schaedel on Oct 24^th, 2013, 4:28am

Hi,

its a long time ago, when i had to use SPICE in school. I WAS able to do things like this. I remember that it wasn't very difficult.

For Simulation i want to control a value (i.e. capacity or resitance) with another input-signal. the paths should be independent. there should only be a control-input (two terminals) an two terminals where between the resistor/capacitor with the controlled value gets connected.

shame on me... everything is forgotten :-[

Thank you for your Help.

Title: Re: controllable value
Post by Andrew Beckett on Dec 27^th, 2013, 4:55am

This probably depends a bit on the simulator you're using, but spectre has a parameter type on its vccs component. You can make the controlled source a voltage controlled resistor or a voltage controlled capacitor (for example). See spectre -h vccs for more detail. Other SPICE simulators also support similar controlled resistors or capacitors, from memory.

Regards,

Andrew.