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How are initial conditions specified in LTspice DC?
Node voltages and inductor currents may be specified. A DC solution is performed using the initial conditions as constraints. Note that although inductors are normally treated as short circuits in the DC solution in other SPICE programs, if an initial current is specified, they are treated as infinite-impedance current sources in LTspice.
When do I stop the simulation In LTspice?
Normally, a dc operating point analysis is performed before starting the transient analysis. This directive suppresses this initialization. The initial conditions of some circuit elements can be can be specified on a per-instance basis. Extra Hint! steady: Stop the simulation when steady state has been reached.
What is the IC Directive for transient analysis?
The .ic directive allows initial conditions for transient analysis to be specified. Node voltages and inductor currents may be specified.
Why are inductors treated as short circuits In LTspice?
Note that although inductors are normally treated as short circuits in the DC solution in other SPICE programs, if an initial current is specified, they are treated as infinite-impedance current sources in LTspice. (This section is currently blank. Contributors of LTwiki will replace this text with their entries.)
Can you use LTspice IV with spiceline2?
Neither can work in LTspice IV…It prompts Unknow Syntax. I beg to differ with you – I am using LTSpice IV, and it works just fine as shown in the attached simulation. As you can see on the right, I entered “IC=3” for the SpiceLine2 box; and the simulation started with V (Vo)=3v as shown on the plot.
How to set the independent voltage source In LTspice?
If you want to set the signal source in “cell” and “voltage”, right click of the mouse on the part of the schematic, and the screen of the above image will appear. Click “Advanced”. Then, the “Independent Voltage Source” screen opens, and you can set the signal source.
How to define the initial charge of a capacitor in spice?
In the SpiceLine cell, type “IC=2”, for example, to set its initial voltage to 2V. Look up help on .IC, initial conditions. This is a directive you drop on the schematic (it finds its way into the spice file when it runs), that allows you to specify initial capacitor voltages and inductor currents, amongst other things.
https://www.youtube.com/watch?v=sGBhvtGbvVM