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Science Forum Index » Electronics - Cad Forum » What these terms of modeling are?
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| Rick G |
 Posted: Mon Mar 17, 2008 10:23 pm |
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Guest
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On Wed, 5 Mar 2008 17:07:09 -0800 (PST), readeraz <cnnihao@126.com>
wrote:
Quote: There are some terms of transformer modeling in spice simulation, like
below,
.SUBCKT 1TO1#0 1 2 3 4
VISRC 9 4 DC 0V
FCTRL 6 2 VISRC 1E+0
EVCVS 8 9 5 2 1E+0
RPRI 1 7 1E-1
RSEC 8 3 1E-1
LLEAK 7 5 1E-6
What meaning of the VISRC and FCTRL and EVCVS are?
[Independant Source]
Vxxx = Dependant Voltage source
format V<name> +node -node DC value of 0 volts
[Dependant Sources]
Exxx =Voltage Controlled Voltage source
format E<name><+node -node> <+ctrl node, -ctrl node> Gain
so device EVCVS has output nodes at 8,9 which is equal to the
voltage across node 5,2 multiplied by gain of 1 <unity gain>
Fxxx = Current Controlled Current source
format F<name> <+node, -node> <ctrl Voltage source> Gain
so device FCTRL has output nodes 6,2 which has a values in
current equal to current flowing through Ctrl voltage source VISRC
times a gain of 1
** notice that this independent voltage source has no dc voltage
value. This acts like an Ammeter
(+) and (-)
Output nodes. A positive current flows from the (+) node through the
source to the (-)
node. The current through the controlling voltage source determines
the output current.
The controlling source must be an independent voltage source (V
device), although it
need not have a zero DC value.
I hope that helps |
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