elektroda.net NewsGroups Forum Index - Electronics Design - Shaped Noise Source (Simulation)
Jim Thompson
Guest
Guest
Mon Feb 08, 2010 12:15 am
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Stephan Goldstein
Guest
Guest
Mon Feb 08, 2010 2:52 pm
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
<To-Email-Use-The-Envelope-Icon_at_My-Web-Site.com> wrote:
Quote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use
...Jim Thompson
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Jim Thompson
Guest
Guest
Mon Feb 08, 2010 4:55 pm
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
<sgoldHAM_at_alum.mit.edu> wrote:
Quote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon_at_My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
To-Email-Use-The-Envelope-Icon_at_My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Jim Thompson
Guest
Guest
Mon Feb 08, 2010 6:22 pm
On Mon, 8 Feb 2010 08:17:18 -0800 (PST), Robert Macy
<macy_at_california.com> wrote:
Quote:
On Feb 8, 6:55 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
[snip]
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
Site.com> wrote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
[snip]
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
For now, I have just a graph, but I expect to have data points
(tabular) in the future.
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Robert Macy
Guest
Guest
Mon Feb 08, 2010 7:17 pm
On Feb 8, 6:55 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
Quote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon athttp://www.analog-innovations.com| 1962 |
I love to cook with wine. Sometimes I even put it in the food.
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon athttp://www.analog-innovations.com| 1962 |
I love to cook with wine. Sometimes I even put it in the food.
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
MooseFET
Guest
Guest
Mon Feb 08, 2010 7:57 pm
On Feb 8, 8:22 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
Quote:
On Mon, 8 Feb 2010 08:17:18 -0800 (PST), Robert Macy
m...@california.com> wrote:
On Feb 8, 6:55 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
[snip]
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
For now, I have just a graph, but I expect to have data points
(tabular) in the future.
m...@california.com> wrote:
On Feb 8, 6:55 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
[snip]
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
For now, I have just a graph, but I expect to have data points
(tabular) in the future.
Do you want the output as a spreadsheet with a column for freq and
another from amplitude?
Do you use open office?
If yes to both I may have a cool solution for you.
Quote:
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon athttp://www.analog-innovations.com| 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Jim Thompson
Guest
Guest
Tue Feb 09, 2010 8:50 pm
On Tue, 9 Feb 2010 10:45:24 -0800 (PST), Robert Macy
<macy_at_california.com> wrote:
Quote:
On Feb 8, 8:22 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 8 Feb 2010 08:17:18 -0800 (PST), Robert Macy
m...@california.com> wrote:
On Feb 8, 6:55 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
[snip]
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
For now, I have just a graph, but I expect to have data points
(tabular) in the future.
...Jim Thompson
[snip]
There are tons of free programs that take a scanned graph and return
data points. From the chatter on the groups, they appear fairly
good. Even much better than the way I do it...point by point by
insidious point.
Site.com> wrote:
On Mon, 8 Feb 2010 08:17:18 -0800 (PST), Robert Macy
m...@california.com> wrote:
On Feb 8, 6:55 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
[snip]
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
For now, I have just a graph, but I expect to have data points
(tabular) in the future.
...Jim Thompson
[snip]
There are tons of free programs that take a scanned graph and return
data points. From the chatter on the groups, they appear fairly
good. Even much better than the way I do it...point by point by
insidious point.
Interesting! Got any links?
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
Robert Macy
Guest
Guest
Tue Feb 09, 2010 9:45 pm
On Feb 8, 8:22 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
Quote:
On Mon, 8 Feb 2010 08:17:18 -0800 (PST), Robert Macy
m...@california.com> wrote:
On Feb 8, 6:55 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
[snip]
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
For now, I have just a graph, but I expect to have data points
(tabular) in the future.
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon athttp://www.analog-innovations.com| 1962 |
I love to cook with wine. Sometimes I even put it in the food.
m...@california.com> wrote:
On Feb 8, 6:55 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
[snip]
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
For now, I have just a graph, but I expect to have data points
(tabular) in the future.
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon athttp://www.analog-innovations.com| 1962 |
I love to cook with wine. Sometimes I even put it in the food.
There are tons of free programs that take a scanned grpah and return
data points. From the chatter on the groups, they appear fairly
good. Even much better than the way I do it...point by point by
insidious point.
Robert Macy
Guest
Guest
Wed Feb 10, 2010 1:14 am
On Feb 9, 10:50 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-
Web-Site.com> wrote:
Quote:
On Tue, 9 Feb 2010 10:45:24 -0800 (PST), Robert Macy
m...@california.com> wrote:
On Feb 8, 8:22 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 8 Feb 2010 08:17:18 -0800 (PST), Robert Macy
m...@california.com> wrote:
On Feb 8, 6:55 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
[snip]
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
For now, I have just a graph, but I expect to have data points
(tabular) in the future.
...Jim Thompson
[snip]
There are tons of free programs that take a scanned graph and return
data points. From the chatter on the groups, they appear fairly
good. Even much better than the way I do it...point by point by
insidious point.
Interesting! Got any links?
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon athttp://www.analog-innovations.com| 1962 |
I love to cook with wine. Sometimes I even put it in the food.
m...@california.com> wrote:
On Feb 8, 8:22 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 8 Feb 2010 08:17:18 -0800 (PST), Robert Macy
m...@california.com> wrote:
On Feb 8, 6:55 am, Jim Thompson <To-Email-Use-The-Envelope-I...@My-Web-
Site.com> wrote:
On Mon, 08 Feb 2010 07:52:03 -0500, Stephan Goldstein
sgold...@alum.mit.edu> wrote:
On Sun, 07 Feb 2010 15:15:05 -0700, Jim Thompson
To-Email-Use-The-Envelope-I...@My-Web-Site.com> wrote:
Anyone with experience in creating a shaped noise source for AC
analysis/simulation in Spice/PSpice/LTspice?
EFREQ in PSpice is a bit of a kluge to use :-(
...Jim Thompson
I'm not familiar with PSpice/LTspice (we use a proprietary
simulator), but if you have a white noise source, why not
build a passive frequency-shaping network and buffer its
output with a vcvs?
Do you want to do this in the frequency domain, or the
time domain? Just curious.
steve
Frequency domain. What you suggest is what I ended up doing... white
noise run thru EFREQ to shape, but using a text editor to roll my own
EFREQ... PSpice working window sucks :-(
...Jim Thompson
[snip]
If it's just to create a table, use a myriad of script languages.
One example, octave [free Matlab clone] can easily convert a formula
of what you want into a PSpice compatible statement for you.
Automatically doing the step between shape and table that you've been
doing with a text editor, Plus, you can make the table variable
resolution. Frequency steps anything you want.
Do you have the shape in the form of a formula, output vs frequency?
For now, I have just a graph, but I expect to have data points
(tabular) in the future.
...Jim Thompson
[snip]
There are tons of free programs that take a scanned graph and return
data points. From the chatter on the groups, they appear fairly
good. Even much better than the way I do it...point by point by
insidious point.
Interesting! Got any links?
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
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I love to cook with wine. Sometimes I even put it in the food.
No, lost them with those 8 HD crashes within 2 years and several
backed up the others! so URLs got lost
googel search?
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