How can I simulate a sinusoidal wave in transient simulation in SILVACO TCAD for a MOSFET?
Is there any code for this purpose?
One way to simulating a sinusoidal wave in SILVACO is using the WAVEFORM statement, an solve it.
For example:
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waveform amplitude=0.01 elec.name=source1 frequency=5e10 number=1 periods=10 sinusoid
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This is a sinusoidal wave that has been applied to electrode source1. It can be solve by the expression as below:
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solve wave$wave dt=5e-12 tfinal=(1e-9)
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That the dt (delta t) is the time difference between any solution until the tfinal.
the easiest generator of a sine wave is:
x(n)=2*cos(omega)*x(n-1) - x(n-2)
cos(omega) is a constant
Do you know this equation?
To do such transient simulation in SILVACO, you first need to generate the transient waveform. Then you can apply the waveform in addition with the DC bias or even with DC ramp. The time span of the transient can be specified using "cycles" parameter.
1st: make the waveform by the following command
waveform sinusoid
It will produce a sine wave according to the equation, AMPLITUDE*exp(-time*DECAY)
*sin(2*PI*(FREQUENCY*time+PHASE/360.0)).
You can input the parameters "AMPLITUDE", "FREQUENCY" etc.
2nd: use the wave form in the solve statement as follows
Solve wave
n is the index of wave, as you can use up to 10 different wave forms individually as well as simultaneously. For example you can write "Solve wave1" to apply the 1st waveform.
I prefer you to see the "Waveform" command in the latest version of silvaco manual.
I have tried this method for simulating, but i got wrong answers!
But the below method, works well. After DC bias:
methode newton tol.time=1e-2
log outfile=unnamed.log
SOLVE TRANS.ANALY FREQUENCY=1e4 Vanode=2 TSTOP=2e-4 TSTEP=0.1e-4 CYCLES=2
Dear Mr. Pil-Ali,
I saw one of your question about the transient simulation in Silvaco. I have the same problem. I want to add the DC and also Sinusoidal wave to one port of the transistor and by doing transient simulation see the out put wave . And also i want to take average form out put sin wave to see the DC level. I will be highly grateful if you give me some advice and comments to do my simulation to know how i can do it
Thank you and best regards.
I also need help in this regard. Can anyone post his sample code ????
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