OrCAD/PSpice Question

[Jason Dugas]

What is the best way to get input and output impedance of a two-port network
using OrCAD/PSpice?

I was just curious if there was a more direct way than what I've been
doing-- exciting the input with a 1Vac signal and dividing that by the input
current. Seems to me they should have a "special button" for getting the
impedances directly...??

Thanks,

Jason

 

[Jim Thompson]

What is the best way to get input and output impedance of a two-port network
using OrCAD/PSpice?

I was just curious if there was a more direct way than what I've been
doing-- exciting the input with a 1Vac signal and dividing that by the input
current. Seems to me they should have a "special button" for getting the
impedances directly...??

Thanks,

Jason

What can be more direct than that?

The AC source (call it VIN) has unity value, thus the following
applies...

Y = REAL(-I(VIN)) + j*IMAG(-I(VIN))

(PSpice uses R=REAL and IM=IMAG, but I made macros that are more
readable.)

Another useful macro that I made is:

CAP = IMAG(-I(VIN))/(2*pi*Frequency)

I also have macros for resolving capacitors with series losses if
anyone is interested (like MOS capacitors).

...Jim Thompson

 

[Jim Thompson]

On Tue, 21 Oct 2003 18:08:37 -0700, Jim Thompson

[snip]

(PSpice uses R=REAL and IM=IMAG, but I made macros that are more
readable.)

[snip]

Make that IMG=IMAG

...Jim Thompson

 

[Jason Dugas]

What can be more direct than that?

The AC source (call it VIN) has unity value, thus the following
applies...

Y = REAL(-I(VIN)) + j*IMAG(-I(VIN))

(PSpice uses R=REAL and IM=IMAG, but I made macros that are more
readable.)

Another useful macro that I made is:

CAP = IMAG(-I(VIN))/(2*pi*Frequency)

I also have macros for resolving capacitors with series losses if
anyone is interested (like MOS capacitors).

...Jim Thompson

hmm, perhaps I'm just spoiled by other software packages. I figured it
would be such a common need that someone might have built in a way to
"automatically" do it.. Thanks.

Jason

 

[Genome]

What is the best way to get input and output impedance of a two-port network
using OrCAD/PSpice?

I was just curious if there was a more direct way than what I've been
doing-- exciting the input with a 1Vac signal and dividing that by the input
current. Seems to me they should have a "special button" for getting the
impedances directly...??

Thanks,

Jason

Given the fact that old cholostemy (sic or shit?) bag Jim has recommended...
gosh this typepimng thing ids most hard... yput method, I'm sure I meant
your method works then I think you might know what you were thinking about
in the first plasce..

So waddya need a fuckin but6ton for it for? AY???? Iy's a mother beautiful
way of getyting the answer and i youve managed to get that onr to work ythen
why do you want yo know more, you arte already dooing th wright thing so
awww bollickes.

DNA,

that was the easy part ...shit I spelt that right bazzzzolobumbingky.

 

[Jim Thompson]

[snip]

Given the fact that old cholostemy (sic or shit?) bag Jim has recommended...
gosh this typepimng thing ids most hard... yput method, I'm sure I meant
your method works then I think you might know what you were thinking about
in the first plasce..

So waddya need a fuckin but6ton for it for? AY???? Iy's a mother beautiful
way of getyting the answer and i youve managed to get that onr to work ythen
why do you want yo know more, you arte already dooing th wright thing so
awww bollickes.

DNA,

that was the easy part ...shit I spelt that right bazzzzolobumbingky.

[snip]

I take it that "A Clockwork Orange" is your favorite movie ?

...Jim Thompson

 

[Genome]

[snip]

Given the fact that old cholostemy (sic or shit?) bag Jim has recommended...
gosh this typepimng thing ids most hard... yput method, I'm sure I meant
your method works then I think you might know what you were thinking about
in the first plasce..

So waddya need a fuckin but6ton for it for? AY???? Iy's a mother beautiful
way of getyting the answer and i youve managed to get that onr to work ythen
why do you want yo know more, you arte already dooing th wright thing so
awww bollickes.

DNA,

that was the easy part ...shit I spelt that right bazzzzolobumbingky.

[snip]

I take it that "A Clockwork Orange" is your favorite movie ?

...Jim Thompson

Oooh, In the cold light of day, having it thrown in my face, satisfying the
masses, for the purposes off.... and other such stuff. Never witnessed it,
no not me, just read it.

Might ave been seminal wivin yor limited frame ov reverence. Witness the
Sven, Tiny Tim, his pissy boots and the Legionnaire might have words. Do
what Do what? Jus trying to play a complement on your meat an two
carcinogenics. I got an erazor head meselff. Nice bit of erupting.

Move on down

DNA

 

[Kevin Aylward]

What can be more direct than that?

One can simply id a source to tell the simulator to automatically
calculate V/I and plot impedance. I am aware of at least one simulator
that does this

Kevin Aylward
[email protected]
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

 

[DarkMatter]

[snip]

Given the fact that old cholostemy (sic or shit?) bag Jim has recommended...
gosh this typepimng thing ids most hard... yput method, I'm sure I meant
your method works then I think you might know what you were thinking about
in the first plasce..

So waddya need a fuckin but6ton for it for? AY???? Iy's a mother beautiful
way of getyting the answer and i youve managed to get that onr to work ythen
why do you want yo know more, you arte already dooing th wright thing so
awww bollickes.

DNA,

that was the easy part ...shit I spelt that right bazzzzolobumbingky.

[snip]

I take it that "A Clockwork Orange" is your favorite movie ?

...Jim Thompson

Oooh, In the cold light of day, having it thrown in my face, satisfying the
masses, for the purposes off.... and other such stuff. Never witnessed it,
no not me, just read it.

Might ave been seminal wivin yor limited frame ov reverence. Witness the
Sven, Tiny Tim, his pissy boots and the Legionnaire might have words. Do
what Do what? Jus trying to play a complement on your meat an two
carcinogenics. I got an erazor head meselff. Nice bit of erupting.

Move on down

DNA

Liquid Droll that fell from a liquid sky, and upset
Un Chien Andalou on its way to a trip to the moon.

Be a high stepper!