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[Help-gnucap] Simulating a discharge circuit
From: |
Thomas Ibbotson |
Subject: |
[Help-gnucap] Simulating a discharge circuit |
Date: |
Thu, 19 Mar 2009 15:03:42 +0000 |
User-agent: |
Thunderbird 2.0.0.19 (X11/20090105) |
Hi,
I am trying to simulate a discharge circuit, using this circuit:
R3 ( 1 2 ) 0.01
R1 ( 0 1 ) 2e6
R2 ( Vhigh 0 ) exp(iv=1e9, pv=3u, td1=1u, tau1=9n, td2=1)
S1 ( 4 3 4 3 ) swmod
Vcc ( Vhigh 0 ) 25K
C1 ( Vhigh 1 ) 1.7n
T1 ( 2 0 3 4 ) Z0=50 TD=37.7n
.model swmod sw(von=5K, voff=-100K, ron=5)
[I run a transient analysis from 0 to 3e-6s with a 1e-9s step and output
the current through the test resistance R3 which is where our current
probe is situated in our experiment]
The voltage controlled switch represents the electrical breakdown above
a voltage of 5KV. This circuit works quite well in reproducing what we
see experimentally. However, there are artifacts caused by the fact that
the switch changes immediately from high to low resistance.
So, I would like to know if it's possible to have a voltage controlled
switch as above but which has a time-dependent model for its switching?
Thanks,
Tom
- [Help-gnucap] Simulating a discharge circuit,
Thomas Ibbotson <=