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?

"readeraz" <cnni...@126.com> schrieb im Newsbeitragnews:bc31866a-f362-4d18-ba67-639dbcb16d7b@f47g2000hsd.googlegroups.com...

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?

Hello,

This may be the model of an "ideal" transformer working from DC
to an upper frequency limit defined by LLEAK and the external
source and load resisatnce.

Try Google: ideal transformer spice

Best regards,
Helmut

"readeraz" <cnni...@126.com> wrote in message

news:bc31866a-f362-4d18-ba67-639dbcb16d7b@f47g2000hsd.googlegroups.com...

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?

Lxxx is an unductor
Rxxx is a resistor
V is a voltage
.subckt is defined elsewhere
the numbers are the nodes.
if you know how to read it the schematic is represented by this data.

Bob

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?

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?

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?

"readeraz" <cnni...@126.com> wrote in message

news:bc31866a-f362-4d18-ba67-639dbcb16d7b@f47g2000hsd.googlegroups.com...

There are some terms of transformer modeling in spice simulation, like
below,

.SUBCKT 1TO1#0  1 2 3 4
VISRC 9 4 DC 0V

N+ and N- are the positive and negative nodes, respectively. Note that
voltage sources need not be grounded. Positive current is assumed to flow
from the positive node, through the source, to the negative node. A current
source of positive value forces current to flow out of the N+ node, through
the source, and into the N- node. Voltage sources, in addition to being used
for circuit excitation, are the 'ammeters' for SPICE, that is, zero valued
voltage sources may be inserted into the circuit for the purpose of
measuring current. They of course have no effect on circuit operation since
they represent short-circuits.

FCTRL 6 2 VISRC 1E+0

Linear Current-Controlled Current Sources
  General form:
  FXXXXXXX N+ N- VNAM VALUE

  Examples:
  F1 13 5 VSENS 5
N+ and N- are the positive and negative nodes, respectively. Current flow is
from the positive node, through the source, to the negative node. VNAM is
the name of a voltage source through which the controlling current flows.
The direction of positive controlling current flow is from the positive
node, through the source, to the negative node of VNAM. VALUE is the current
gain.

EVCVS 8 9 5 2 1E+0

Linear Voltage-Controlled Voltage Sources
  General form:
  EXXXXXXX N+ N- NC+ NC- VALUE

  Examples:
  E1 2 3 14 1 2.0
N+ is the positive node, and N- is the negative node. NC+ and NC- are the
positive and negative controlling nodes, respectively. VALUE is the voltage
gain.



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?- Hide quoted text -

- Show quoted text -

EVCVS 8 9 5 2 1E+0
into

EVCVS 8 9 5 2 1E-1
the simulation can run, that means, when gain is 0.1, simulation can

On Mar 6, 9:07 pm, "sycochkn" <sycoc...@earthlink.net> wrote:





"readeraz" <cnni...@126.com> wrote in message

news:bc31866a-f362-4d18-ba67-639dbcb16d7b@f47g2000hsd.googlegroups.com...

There are some terms of transformer modeling in spice simulation, like
below,

.SUBCKT 1TO1#0  1 2 3 4
VISRC 9 4 DC 0V

N+ and N- are the positive and negative nodes, respectively. Note that
voltage sources need not be grounded. Positive current is assumed to flow
from the positive node, through the source, to the negative node. A current
source of positive value forces current to flow out of the N+ node, through
the source, and into the N- node. Voltage sources, in addition to being used
for circuit excitation, are the 'ammeters' for SPICE, that is, zero valued
voltage sources may be inserted into the circuit for the purpose of
measuring current. They of course have no effect on circuit operation since
they represent short-circuits.

FCTRL 6 2 VISRC 1E+0

Linear Current-Controlled Current Sources
  General form:
  FXXXXXXX N+ N- VNAM VALUE

  Examples:
  F1 13 5 VSENS 5
N+ and N- are the positive and negative nodes, respectively. Current flow is
from the positive node, through the source, to the negative node. VNAM is
the name of a voltage source through which the controlling current flows..
The direction of positive controlling current flow is from the positive
node, through the source, to the negative node of VNAM. VALUE is the current
gain.

EVCVS 8 9 5 2 1E+0

Linear Voltage-Controlled Voltage Sources
  General form:
  EXXXXXXX N+ N- NC+ NC- VALUE

  Examples:
  E1 2 3 14 1 2.0
N+ is the positive node, and N- is the negative node. NC+ and NC- are the
positive and negative controlling nodes, respectively. VALUE is the voltage
gain.

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?- Hide quoted text -

- Show quoted text -

Thank you very much, Sycon,
its very clear to explain.
but I wonder why I change
FCTRL 6 2 VISRC 1E+0> EVCVS 8 9 5 2 1E+0

into
FCTRL 6 2 VISRC 1E-1> EVCVS 8 9 5 2 1E-1

the simulation can run, that means, when gain is 0.1, simulation can
be run, but when gain is 1, it denny to run and display wrong message
as
step too small,
whats matter?- Hide quoted text -

- Show quoted text -

"readeraz" <cnni...@126.com> wrote in message

news:e2aff5ab-25e0-405d-bb96-0c08d5e88d1d@e23g2000prf.googlegroups.com...
On Mar 7, 9:41 am, readeraz <cnni...@126.com> wrote:





On Mar 6, 9:07 pm, "sycochkn" <sycoc...@earthlink.net> wrote:

"readeraz" <cnni...@126.com> wrote in message

news:bc31866a-f362-4d18-ba67-639dbcb16d7b@f47g2000hsd.googlegroups.com....

There are some terms of transformer modeling in spice simulation, like
below,

.SUBCKT 1TO1#0 1 2 3 4
VISRC 9 4 DC 0V

N+ and N- are the positive and negative nodes, respectively. Note that
voltage sources need not be grounded. Positive current is assumed to
flow
from the positive node, through the source, to the negative node. A
current
source of positive value forces current to flow out of the N+ node,
through
the source, and into the N- node. Voltage sources, in addition to being
used
for circuit excitation, are the 'ammeters' for SPICE, that is, zero
valued
voltage sources may be inserted into the circuit for the purpose of
measuring current. They of course have no effect on circuit operation
since
they represent short-circuits.

FCTRL 6 2 VISRC 1E+0

Linear Current-Controlled Current Sources
General form:
FXXXXXXX N+ N- VNAM VALUE

Examples:
F1 13 5 VSENS 5
N+ and N- are the positive and negative nodes, respectively. Current
flow is
from the positive node, through the source, to the negative node. VNAM
is
the name of a voltage source through which the controlling current
flows.
The direction of positive controlling current flow is from the positive
node, through the source, to the negative node of VNAM. VALUE is the
current
gain.

EVCVS 8 9 5 2 1E+0

Linear Voltage-Controlled Voltage Sources
General form:
EXXXXXXX N+ N- NC+ NC- VALUE

Examples:
E1 2 3 14 1 2.0
N+ is the positive node, and N- is the negative node. NC+ and NC- are
the
positive and negative controlling nodes, respectively. VALUE is the
voltage
gain.

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?- Hide quoted text -

- Show quoted text -

Thank you very much, Sycon,
its very clear to explain.
but I wonder why I change
FCTRL 6 2 VISRC 1E+0> EVCVS 8 9 5 2 1E+0

into
FCTRL 6 2 VISRC 1E-1> EVCVS 8 9 5 2 1E-1

the simulation can run, that means, when gain is 0.1, simulation can
be run, but when gain is 1, it denny to run and display wrong message
as
step too small,
whats matter?- Hide quoted text -

- Show quoted text -

BTW,
how to creat the following words xxxx?
is it random? or by context?
for example
Vxxxx
producing
VISRC,
Vcon
V1 etc?

the xxxx is where you enter an arbitrary name to make it unique.

Bob- Hide quoted text -

- Show quoted text -

On Mar 6, 9:07 pm, "sycochkn" <sycoc...@earthlink.net> wrote:





"readeraz" <cnni...@126.com> wrote in message

news:bc31866a-f362-4d18-ba67-639dbcb16d7b@f47g2000hsd.googlegroups.com...

There are some terms of transformer modeling in spice simulation, like
below,

.SUBCKT 1TO1#0 1 2 3 4
VISRC 9 4 DC 0V

N+ and N- are the positive and negative nodes, respectively. Note that
voltage sources need not be grounded. Positive current is assumed to
flow
from the positive node, through the source, to the negative node. A
current
source of positive value forces current to flow out of the N+ node,
through
the source, and into the N- node. Voltage sources, in addition to being
used
for circuit excitation, are the 'ammeters' for SPICE, that is, zero
valued
voltage sources may be inserted into the circuit for the purpose of
measuring current. They of course have no effect on circuit operation
since
they represent short-circuits.

FCTRL 6 2 VISRC 1E+0

Linear Current-Controlled Current Sources
General form:
FXXXXXXX N+ N- VNAM VALUE

Examples:
F1 13 5 VSENS 5
N+ and N- are the positive and negative nodes, respectively. Current
flow is
from the positive node, through the source, to the negative node. VNAM
is
the name of a voltage source through which the controlling current
flows.
The direction of positive controlling current flow is from the positive
node, through the source, to the negative node of VNAM. VALUE is the
current
gain.

EVCVS 8 9 5 2 1E+0

Linear Voltage-Controlled Voltage Sources
General form:
EXXXXXXX N+ N- NC+ NC- VALUE

Examples:
E1 2 3 14 1 2.0
N+ is the positive node, and N- is the negative node. NC+ and NC- are
the
positive and negative controlling nodes, respectively. VALUE is the
voltage
gain.

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?- Hide quoted text -

- Show quoted text -

Thank you very much, Sycon,
its very clear to explain.
but I wonder why I change
FCTRL 6 2 VISRC 1E+0> EVCVS 8 9 5 2 1E+0

into
FCTRL 6 2 VISRC 1E-1> EVCVS 8 9 5 2 1E-1

the simulation can run, that means, when gain is 0.1, simulation can
be run, but when gain is 1, it denny to run and display wrong message
as
step too small,
whats matter?- Hide quoted text -

- Show quoted text -

On Mar 6, 9:07 pm, "sycochkn" <sycoc...@earthlink.net> wrote:
"readeraz" <cnni...@126.com> wrote in message

news:bc31866a-f362-4d18-ba67-639dbcb16d7b@f47g2000hsd.googlegroups.com...

There are some terms of transformer modeling in spice simulation,
like below,

.SUBCKT 1TO1#0 1 2 3 4
VISRC 9 4 DC 0V

N+ and N- are the positive and negative nodes, respectively. Note
that voltage sources need not be grounded. Positive current is
assumed to flow from the positive node, through the source, to the
negative node. A current source of positive value forces current to
flow out of the N+ node, through the source, and into the N- node.
Voltage sources, in addition to being used for circuit excitation,
are the 'ammeters' for SPICE, that is, zero valued voltage sources
may be inserted into the circuit for the purpose of measuring
current. They of course have no effect on circuit operation since
they represent short-circuits.

FCTRL 6 2 VISRC 1E+0

Linear Current-Controlled Current Sources
General form:
FXXXXXXX N+ N- VNAM VALUE

Examples:
F1 13 5 VSENS 5
N+ and N- are the positive and negative nodes, respectively. Current
flow is from the positive node, through the source, to the negative
node. VNAM is the name of a voltage source through which the
controlling current flows. The direction of positive controlling
current flow is from the positive node, through the source, to the
negative node of VNAM. VALUE is the current gain.

EVCVS 8 9 5 2 1E+0

Linear Voltage-Controlled Voltage Sources
General form:
EXXXXXXX N+ N- NC+ NC- VALUE

Examples:
E1 2 3 14 1 2.0
N+ is the positive node, and N- is the negative node. NC+ and NC-
are the positive and negative controlling nodes, respectively. VALUE
is the voltage gain.



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?- Hide quoted
text -

- Show quoted text -

Thank you very much, Sycon,
its very clear to explain.
but I wonder why I change
FCTRL 6 2 VISRC 1E+0
EVCVS 8 9 5 2 1E+0
into
FCTRL 6 2 VISRC 1E-1
EVCVS 8 9 5 2 1E-1
the simulation can run, that means, when gain is 0.1, simulation can
be run, but when gain is 1, it denny to run and display wrong message
as
step too small,
whats matter?

readeraz wrote:
On Mar 6, 9:07 pm, "sycochkn" <sycoc...@earthlink.net> wrote:
"readeraz" <cnni...@126.com> wrote in message

news:bc31866a-f362-4d18-ba67-639dbcb16d7b@f47g2000hsd.googlegroups.com....

There are some terms of transformer modeling in spice simulation,
like below,

.SUBCKT 1TO1#0 1 2 3 4
VISRC 9 4 DC 0V

N+ and N- are the positive and negative nodes, respectively. Note
that voltage sources need not be grounded. Positive current is
assumed to flow from the positive node, through the source, to the
negative node. A current source of positive value forces current to
flow out of the N+ node, through the source, and into the N- node.
Voltage sources, in addition to being used for circuit excitation,
are the 'ammeters' for SPICE, that is, zero valued voltage sources
may be inserted into the circuit for the purpose of measuring
current. They of course have no effect on circuit operation since
they represent short-circuits.

FCTRL 6 2 VISRC 1E+0

Linear Current-Controlled Current Sources
General form:
FXXXXXXX N+ N- VNAM VALUE

Examples:
F1 13 5 VSENS 5
N+ and N- are the positive and negative nodes, respectively. Current
flow is from the positive node, through the source, to the negative
node. VNAM is the name of a voltage source through which the
controlling current flows. The direction of positive controlling
current flow is from the positive node, through the source, to the
negative node of VNAM. VALUE is the current gain.

EVCVS 8 9 5 2 1E+0

Linear Voltage-Controlled Voltage Sources
General form:
EXXXXXXX N+ N- NC+ NC- VALUE

Examples:
E1 2 3 14 1 2.0
N+ is the positive node, and N- is the negative node. NC+ and NC-
are the positive and negative controlling nodes, respectively. VALUE
is the voltage gain.

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?- Hide quoted
text -

- Show quoted text -

Thank you very much, Sycon,
its very clear to explain.
but I wonder why I change
FCTRL 6 2 VISRC 1E+0
EVCVS 8 9 5 2 1E+0
into
FCTRL 6 2 VISRC 1E-1
EVCVS 8 9 5 2 1E-1
the simulation can run, that means, when gain is 0.1, simulation can
be run, but when gain is 1, it denny to run and display wrong message
as
step too small,
whats matter?

A "time step to small" error is simply that the spice engine was unable to
find a solution. It does not mean that there is a specific error in the
circuit. However, unrealistic circuits can produce this failure to converge
problem.

Spice is a general purpose non-linear differential equation solver. It does
this numerically. There is no guarantee that all circuits can be solved by
this technique.

--
Kevin Aylward
kaREM...@anasoft.co.ukwww.anasoft.co.uk
SuperSpice- Hide quoted text -

- Show quoted text -