PSPICE ABM question

M

Mathias

Guest
Dear ng,

Is there a way to build a programmable (nonlinear) resistor in pspice?
I currently use an ABM1 block as an input-voltage-dependent voltage
source. This works fine on the output side, but it doesn't "consume" any
current on its input side as a real resistor would.

Thanks for any suggestion,
Mathias
 
On Wed, 14 Mar 2007 16:31:42 +0100, Mathias
<mathiasDOTfranzius@webDELETEME.de> wrote:

Dear ng,

Is there a way to build a programmable (nonlinear) resistor in pspice?
I currently use an ABM1 block as an input-voltage-dependent voltage
source. This works fine on the output side, but it doesn't "consume" any
current on its input side as a real resistor would.

Thanks for any suggestion,
Mathias
Click to expand...
You should be using GVALUE or GTABLE. Then you tie outputs back to
inputs to get it to "consume" current.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
Hi Jim,

i think i could use it in the "native spice text input file", but I'm
lost when trying to use it in pspice's Schematics graphical layout tool.
Maybe I'd have to define a specific "part" in a textfile and import it
into Schematics?

Thanks,
Mathias

Jim Thompson wrote:
On Wed, 14 Mar 2007 16:31:42 +0100, Mathias
mathiasDOTfranzius@webDELETEME.de> wrote:

Dear ng,

Is there a way to build a programmable (nonlinear) resistor in pspice?
I currently use an ABM1 block as an input-voltage-dependent voltage
source. This works fine on the output side, but it doesn't "consume" any
current on its input side as a real resistor would.

Thanks for any suggestion,
Mathias

You should be using GVALUE or GTABLE. Then you tie outputs back to
inputs to get it to "consume" current.

...Jim Thompson
Click to expand...
 
On Wed, 14 Mar 2007 18:27:59 +0100, Mathias
<mathiasDOTfranzius@webDELETEME.de> wrote:

Hi Jim,

i think i could use it in the "native spice text input file", but I'm
lost when trying to use it in pspice's Schematics graphical layout tool.
Click to expand...
What version are you using? PSpice Schematics or Capture (gag me with
a spoon ?:)

I don't remember now when GVALUE first appeared.

What happens if you "Get Part, GVALUE" ?

Maybe I'd have to define a specific "part" in a textfile and import it
into Schematics?

Thanks,
Mathias
Click to expand...
You can make almost anything up using .SUBCKT definition and POLY
notation, if your version lacks ABM's....

I'm slow this morning, you do say "ABM1", so I'm sure you have GVALUE.

GVALUE/EVALUE devices accept Algebraic expressions.

Jim Thompson wrote:
On Wed, 14 Mar 2007 16:31:42 +0100, Mathias
mathiasDOTfranzius@webDELETEME.de> wrote:

Dear ng,

Is there a way to build a programmable (nonlinear) resistor in pspice?
I currently use an ABM1 block as an input-voltage-dependent voltage
source. This works fine on the output side, but it doesn't "consume" any
current on its input side as a real resistor would.

Thanks for any suggestion,
Mathias

You should be using GVALUE or GTABLE. Then you tie outputs back to
inputs to get it to "consume" current.

...Jim Thompson
Click to expand...

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
No! It's me who gets sleepy in the evening, you seem already bright awake ;)
I always prefiltered for parts including "ABM", no wonder I couldn't
find the GVALUE.

Thanks a lot!
Mathias

What version are you using? PSpice Schematics or Capture (gag me with
a spoon ?:)

I don't remember now when GVALUE first appeared.

What happens if you "Get Part, GVALUE" ?

Maybe I'd have to define a specific "part" in a textfile and import it
into Schematics?

Thanks,
Mathias

You can make almost anything up using .SUBCKT definition and POLY
notation, if your version lacks ABM's....

I'm slow this morning, you do say "ABM1", so I'm sure you have GVALUE.

GVALUE/EVALUE devices accept Algebraic expressions.
Click to expand...
 
On Wed, 14 Mar 2007 19:45:09 +0100, Mathias
<mathiasDOTfranzius@webDELETEME.de> wrote:

No! It's me who gets sleepy in the evening, you seem already bright awake ;)
I always prefiltered for parts including "ABM", no wonder I couldn't
find the GVALUE.
Click to expand...
That pre-filtering can turn into a nuisance, not returning easily to a
full list :-(

Thanks a lot!
Mathias
Click to expand...
I awoke 5.5 hours ago... it's just now lunch time here ;-)

What version are you using? PSpice Schematics or Capture (gag me with
a spoon ?:)

I don't remember now when GVALUE first appeared.

What happens if you "Get Part, GVALUE" ?

Maybe I'd have to define a specific "part" in a textfile and import it
into Schematics?

Thanks,
Mathias

You can make almost anything up using .SUBCKT definition and POLY
notation, if your version lacks ABM's....

I'm slow this morning, you do say "ABM1", so I'm sure you have GVALUE.

GVALUE/EVALUE devices accept Algebraic expressions.
Click to expand...

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona Voice:(480)460-2350 | |
| E-mail Address at Website Fax:(480)460-2142 | Brass Rat |
| http://www.analog-innovations.com | 1962 |

I love to cook with wine. Sometimes I even put it in the food.
 
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