Qucs - Revision history

Pew at 07:36, 4 January 2019

2019-01-04T07:36:37Z

Pew at 07:35, 4 January 2019

2019-01-04T07:35:54Z

Pew: Undo revision 144 by imported>Pew (talk)

2019-01-04T00:20:54Z

Undo revision 144 by [[Special:Contributions/imported>Pew|imported>Pew]] ([[User talk:imported>Pew|talk]])

imported>Pew: Replaced content with "Category:Pending deletion"

2018-01-04T04:17:16Z

Replaced content with "Category:Pending deletion"

imported>Pew at 07:27, 3 January 2018

2018-01-03T07:27:11Z

imported>Pew at 06:26, 3 January 2018

2018-01-03T06:26:54Z

imported>Cov: /* Links */

2010-01-05T21:42:11Z

‎Links

imported>Cov at 17:11, 9 December 2009

2009-12-09T17:11:22Z

imported>Cov at 17:09, 9 December 2009

2009-12-09T17:09:18Z

imported>Cov: /* About */

2009-12-09T16:19:35Z

‎About

@@ Line 1: / Line 1: @@
-'''Qucs''', the '''Quite Universal Circuit Simulator''', is a [[w:Free Software|Free Software]] integrated schematic capture and simulation tool for digital and analog signals. It supports DC, transient, AC and digital simulations as well as parameter sweeping. It does not currently support Monte Carlo simulations, although with some crude Bash and [[Class_software#QtOctave_-_GUI_for_Octave]] work, this can be overcome. If you don't mind using extra tools for Monte Carlo simulation and are willing to fudge the exact model of op-amps used in [[Lab-in-a-Box]] projects, Qucs and be used to complete assignments in [[ECE 2074 Electric Circuit Analysis Laboratory]].
+'''Qucs''', the '''Quite Universal Circuit Simulator''', is a [[w:Free Software|Free Software]] integrated schematic capture and simulation tool for digital and analog signals. It supports DC, transient, AC and digital simulations as well as parameter sweeping. It does not currently support Monte Carlo simulations, although with some crude Bash and [[Class_software#QtOctave_-_GUI_for_Octave|QtOctave]] work, this can be overcome. If you don't mind using extra tools for Monte Carlo simulation and are willing to fudge the exact model of op-amps used in [[Lab-in-a-Box]] projects, Qucs and be used to complete assignments in [[ECE 2074 Electric Circuit Analysis Laboratory]].
 =Screen Shot=
@@ Line 58: / Line 58: @@
 </pre>
-If all goes well, it should generate a <code>monte_carlo.m</code> file. Open this up with [[Class_software#QtOctave_-_GUI_for_Octave]] and plot a histogram. The Plot->2D...->Histogram menu selection is a good start, although it seems a little buggy and you many want to start with the command it gives you and tweak the Octave plot command until you have proper labels and so on.
+If all goes well, it should generate a <code>monte_carlo.m</code> file. Open this up with [[Class_software#QtOctave_-_GUI_for_Octave|QtOctave]] and plot a histogram. The Plot->2D...->Histogram menu selection is a good start, although it seems a little buggy and you many want to start with the command it gives you and tweak the Octave plot command until you have proper labels and so on.
 If you want to stitch the voltage and current plots together into one image, you can use ImageMagick for that:
@@ Line 69: / Line 69: @@
 =See Also=
-* [[Class_software#QtOctave_-_GUI_for_Octave]]
+* [[Class_software#QtOctave_-_GUI_for_Octave|QtOctave]]
 * [[ECE 2004 Electric Circuit Analysis]]
 * [[ECE 2074 Electric Circuit Analysis Laboratory]]

@@ Line 1: / Line 1: @@
-'''Qucs''', the '''Quite Universal Circuit Simulator''', is a [[Free Software]] integrated schematic capture and simulation tool for digital and analog signals. It supports DC, transient, AC and digital simulations as well as parameter sweeping. It does not currently support Monte Carlo simulations, although with some crude Bash and [[QtOctave]] work, this can be overcome. If you don't mind using extra tools for Monte Carlo simulation and are willing to fudge the exact model of op-amps used in [[Lab-in-a-Box]] projects, Qucs and be used to complete assignments in [[ECE 2074 Electric Circuit Analysis Laboratory]].
+'''Qucs''', the '''Quite Universal Circuit Simulator''', is a [[w:Free Software|Free Software]] integrated schematic capture and simulation tool for digital and analog signals. It supports DC, transient, AC and digital simulations as well as parameter sweeping. It does not currently support Monte Carlo simulations, although with some crude Bash and [[Class_software#QtOctave_-_GUI_for_Octave]] work, this can be overcome. If you don't mind using extra tools for Monte Carlo simulation and are willing to fudge the exact model of op-amps used in [[Lab-in-a-Box]] projects, Qucs and be used to complete assignments in [[ECE 2074 Electric Circuit Analysis Laboratory]].
 =Screen Shot=
@@ Line 58: / Line 58: @@
 </pre>
-If all goes well, it should generate a <code>monte_carlo.m</code> file. Open this up with [[QtOctave]] and plot a histogram. The Plot->2D...->Histogram menu selection is a good start, although it seems a little buggy and you many want to start with the command it gives you and tweak the Octave plot command until you have proper labels and so on.
+If all goes well, it should generate a <code>monte_carlo.m</code> file. Open this up with [[Class_software#QtOctave_-_GUI_for_Octave]] and plot a histogram. The Plot->2D...->Histogram menu selection is a good start, although it seems a little buggy and you many want to start with the command it gives you and tweak the Octave plot command until you have proper labels and so on.
 If you want to stitch the voltage and current plots together into one image, you can use ImageMagick for that:
@@ Line 69: / Line 69: @@
 =See Also=
-* [[QtOctave]]
+* [[Class_software#QtOctave_-_GUI_for_Octave]]
 * [[ECE 2004 Electric Circuit Analysis]]
 * [[ECE 2074 Electric Circuit Analysis Laboratory]]

← Older revision		Revision as of 00:20, 4 January 2019
Line 1:		Line 1:
−	[[Category:~~Pending deletion~~]]	+	'''Qucs''', the '''Quite Universal Circuit Simulator''', is a [[Free Software]] integrated schematic capture and simulation tool for digital and analog signals. It supports DC, transient, AC and digital simulations as well as parameter sweeping. It does not currently support Monte Carlo simulations, although with some crude Bash and [[QtOctave]] work, this can be overcome. If you don't mind using extra tools for Monte Carlo simulation and are willing to fudge the exact model of op-amps used in [[Lab-in-a-Box]] projects, Qucs and be used to complete assignments in [[ECE 2074 Electric Circuit Analysis Laboratory]].
		+
		+	=Screen Shot=
		+	[[Image:Qucs_0.0.15.png]]
		+
		+	=Monte Carlo Simulation=
		+	The following steps show how to produce voltage and current histograms in a simple sources-and-resistors circuit.
		+
		+	The first step is to draw your circuit and make sure it simulates as expected. Use a <code>dc simulation</code>, a current probe to measure the current you're interested in and two labels and a difference equation to define the specific voltage drop you're interested in measuring. An example is presented below.
		+	[[Image:Monte_Carlo-DC_Bias.png]]
		+
		+	It is necessary to define a resistor with a variable value within a given tolerance. This can be accomplished with the following circuit. You can recreate this circuit yourself or download <code>res_tol.sch</code> from [http://vtluug.org/files/qucs/ http://vtluug.org/files/qucs].
		+	[[Image:Monte_Carlo-Resistor_with_tolerance.png]]
		+
		+	Next, replace all the regular resistors in your original circuit with subcircuits of the previously made varying resistor. For randomized results on each run, it is necessary to provide a seed to the random number generator. For now, define an equation the likes of <code>z=srandom(1337)</code>. The actual value is just a placeholder and will be replaced when the simulations are run from the commandline.
		+	[[Image:Monte_Carlo-Var_Circuit.png]]
		+
		+	Save and run the circuit. You should be able verify that the result changes slightly given different random number seeds. You'll now need to automate running the simulation with different seeds. Open up the netlist by selecting Simulation->Show Last Netlist. Copy the contents of this file into a text editor and save it as <code>monte_carlo_netlist.txt</code>. Then, paste the following bash script into a text editor and save it as <code>monte_carlo.sh</code>. The variables of the script can be edited to suit. The value of <code>REPLACEME</code> should be the unique placeholder value used as the pseudo-random number generator seed earlier. The value of <code>NUM</code> determines how many times the simulation is run.
		+	<pre>
		+	#!/bin/bash
		+
		+	INFILE="monte_carlo_netlist.txt"
		+	REPLACE="1337"
		+	OUTFILE="monte_carlo"
		+	NUM=400
		+
		+	echo -n > "${OUTFILE}.temp"
		+	for i in $(seq 1 $NUM) ; do
		+	sed s/$REPLACE/$(date +%N)/ $INFILE \| qucsator \| sed -nr \
		+	-e '/<indep Vdrop/,/<\/indep/p' \
		+	-e '/<indep Pr1.I/,/<\/indep/p' \
		+	\| sed -nr '/-?[0-9]\.[0-9]+e[-+][0-9]+/ p' \
		+	>> "${OUTFILE}.temp"
		+	done
		+
		+
		+	echo -n > "${OUTFILE}.dat"
		+	echo -n "values=[" > "${OUTFILE}.m"
		+	odd=1
		+	for r in $(cat "${OUTFILE}.temp") ; do
		+	if [ $odd -eq 1 ] ; then
		+	echo -n "${r} " >> "${OUTFILE}.dat"
		+	echo -n "${r} " >> "${OUTFILE}.m"
		+	odd=0
		+	else
		+	echo $r >> "${OUTFILE}.dat"
		+	echo $r >> "${OUTFILE}.m"
		+	odd=1
		+	fi
		+	done
		+	sed -i '$ s/$/]/' "${OUTFILE}.m"
		+	</pre>
		+
		+	Make the script executable and run it:
		+	<pre>
		+	chmod +x monte_carlo.sh
		+	./monte_carlo
		+	</pre>
		+
		+	If all goes well, it should generate a <code>monte_carlo.m</code> file. Open this up with [[QtOctave]] and plot a histogram. The Plot->2D...->Histogram menu selection is a good start, although it seems a little buggy and you many want to start with the command it gives you and tweak the Octave plot command until you have proper labels and so on.
		+
		+	If you want to stitch the voltage and current plots together into one image, you can use ImageMagick for that:
		+	<pre>
		+	convert voltage.png current.png +append voltsamps.png
		+	</pre>
		+
		+	Here is an example final product.
		+	[[Image:Monte_Carlo-Voltsamps.png]]
		+
		+	=See Also=
		+	* [[QtOctave]]
		+	* [[ECE 2004 Electric Circuit Analysis]]
		+	* [[ECE 2074 Electric Circuit Analysis Laboratory]]
		+
		+	=Links=
		+	* [http://qucs.sourceforge.net/ Qucs homepage]
		+	* [http://qucs.sourceforge.net/docs/workbook.pdf Qucs Workbook]
		+
		+	[[Category:Software]]
		+	[[Category:Howtos]]
		+	[{Category:Scripts]]

← Older revision		Revision as of 04:17, 4 January 2018
Line 1:		Line 1:
−	~~TODO: Migrate to software page~~	+	[[Category:Pending deletion]]
−
−	'''Qucs''', the '''Quite Universal Circuit Simulator''', is a [[Free Software]] integrated schematic capture and simulation tool for digital and analog signals. It supports DC, transient, AC and digital simulations as well as parameter sweeping. It does not currently support Monte Carlo simulations, although with some crude Bash and [[QtOctave]] work, this can be overcome. If you don't mind using extra tools for Monte Carlo simulation and are willing to fudge the exact model of op-amps used in [[Lab-in-a-Box]] projects, Qucs and be used to complete assignments in [[ECE 2074 Electric Circuit Analysis Laboratory]].
−
−	~~=Screen Shot=~~
−	~~[[Image:Qucs_0.0.15.png]]~~
−
−	~~=Monte Carlo Simulation=~~
−	~~The following steps show how to produce voltage and current histograms in a simple sources-and-resistors circuit.~~
−
−	The first step is to draw your circuit and make sure it simulates as expected. Use a <code>dc simulation</code>, a current probe to measure the current you're interested in and two labels and a difference equation to define the specific voltage drop you're interested in measuring. An example is presented below.
−	~~[[Image:Monte_Carlo-DC_Bias.png]]~~
−
−	It is necessary to define a resistor with a variable value within a given tolerance. This can be accomplished with the following circuit. You can recreate this circuit yourself or download <code>res_tol.sch</code> from [http://vtluug.org/files/qucs/ http://vtluug.org/files/qucs].
−	~~[[Image:Monte_Carlo-Resistor_with_tolerance.png]]~~
−
−	Next, replace all the regular resistors in your original circuit with subcircuits of the previously made varying resistor. For randomized results on each run, it is necessary to provide a seed to the random number generator. For now, define an equation the likes of <code>z=srandom(1337)</code>. The actual value is just a placeholder and will be replaced when the simulations are run from the commandline.
−	~~[[Image:Monte_Carlo-Var_Circuit.png]]~~
−
−	Save and run the circuit. You should be able verify that the result changes slightly given different random number seeds. You'll now need to automate running the simulation with different seeds. Open up the netlist by selecting Simulation->Show Last Netlist. Copy the contents of this file into a text editor and save it as <code>monte_carlo_netlist.txt</code>. Then, paste the following bash script into a text editor and save it as <code>monte_carlo.sh</code>. The variables of the script can be edited to suit. The value of <code>REPLACEME</code> should be the unique placeholder value used as the pseudo-random number generator seed earlier. The value of <code>NUM</code> determines how many times the simulation is run.
−	~~<pre>~~
−	~~#!/bin/bash~~
−
−	~~INFILE="monte_carlo_netlist.txt"~~
−	~~REPLACE="1337"~~
−	~~OUTFILE="monte_carlo"~~
−	~~NUM=400~~
−
−	~~echo -n > "${OUTFILE}.temp"~~
−	~~for i in $(seq 1 $NUM) ; do~~
−	~~sed s/$REPLACE/$(date +%N)/ $INFILE \| qucsator \| sed -nr \~~
−	~~-e '/<indep Vdrop/,/<\/indep/p' \~~
−	~~-e '/<indep Pr1.I/,/<\/indep/p' \~~
−	~~\| sed -nr '/-?[0-9]\.[0-9]+e[-+][0-9]+/ p' \~~
−	~~>> "${OUTFILE}.temp"~~
−	~~done~~
−
−
−	~~echo -n > "${OUTFILE}.dat"~~
−	~~echo -n "values=[" > "${OUTFILE}.m"~~
−	~~odd=1~~
−	~~for r in $(cat "${OUTFILE}.temp") ; do~~
−	~~if [ $odd -eq 1 ] ; then~~
−	~~echo -n "${r} " >> "${OUTFILE}.dat"~~
−	~~echo -n "${r} " >> "${OUTFILE}.m"~~
−	~~odd=0~~
−	~~else~~
−	~~echo $r >> "${OUTFILE}.dat"~~
−	~~echo $r >> "${OUTFILE}.m"~~
−	~~odd=1~~
−	fi
−	~~done~~
−	~~sed -i '$ s/$/]/' "${OUTFILE}.m"~~
−	~~</pre>~~
−
−	~~Make the script executable and run it:~~
−	~~<pre>~~
−	~~chmod +x monte_carlo.sh~~
−	~~./monte_carlo~~
−	~~</pre>~~
−
−	If all goes well, it should generate a <code>monte_carlo.m</code> file. Open this up with [[QtOctave]] and plot a histogram. The Plot->2D...->Histogram menu selection is a good start, although it seems a little buggy and you many want to start with the command it gives you and tweak the Octave plot command until you have proper labels and so on.
−
−	~~If you want to stitch the voltage and current plots together into one image, you can use ImageMagick for that:~~
−	~~<pre>~~
−	~~convert voltage.png current.png +append voltsamps.png~~
−	~~</pre>~~
−
−	~~Here is an example final product.~~
−	~~[[Image:Monte_Carlo-Voltsamps.png]]~~
−
−	~~=See Also=~~
−	* [[QtOctave]]
−	* [[ECE 2004 Electric Circuit Analysis]]
−	* [[ECE 2074 Electric Circuit Analysis Laboratory]]
−
−	~~=Links=~~
−	* [http://qucs.sourceforge.net/ Qucs homepage]
−	* [http://qucs.sourceforge.net/docs/workbook.pdf Qucs Workbook]
−
−	[[Category:~~Needs restoration~~]]

← Older revision		Revision as of 07:27, 3 January 2018
Line 79:		Line 79:
	* [http://qucs.sourceforge.net/docs/workbook.pdf Qucs Workbook]		* [http://qucs.sourceforge.net/docs/workbook.pdf Qucs Workbook]

−	~~[[Category:Libre course software]]~~
−	~~[[Category:Desktop *nix software]]~~
−	~~[[Category:Howtos]]~~
−	~~[[Category:Electrical and Computer Engineering]]~~
	[[Category:Needs restoration]]		[[Category:Needs restoration]]

@@ Line 1: / Line 1: @@
 '''Qucs''', the '''Quite Universal Circuit Simulator''', is a [[Free Software]] integrated schematic capture and simulation tool for digital and analog signals. It supports DC, transient, AC and digital simulations as well as parameter sweeping. It does not currently support Monte Carlo simulations, although with some crude Bash and [[QtOctave]] work, this can be overcome. If you don't mind using extra tools for Monte Carlo simulation and are willing to fudge the exact model of op-amps used in [[Lab-in-a-Box]] projects, Qucs and be used to complete assignments in [[ECE 2074 Electric Circuit Analysis Laboratory]].
@@ Line 81: / Line 83: @@
 [[Category:Howtos]]
 [[Category:Electrical and Computer Engineering]]

@@ Line 78: / Line 78: @@
 [[Category:Libre course software]]
-[[Category:*nix desktop software]]
+[[Category:Desktop *nix software]]
 [[Category:Howtos]]
 [[Category:Electrical and Computer Engineering]]

← Older revision		Revision as of 16:19, 9 December 2009
Line 1:		Line 1:
−	~~=About=~~
	'''Qucs''', the '''Quite Universal Circuit Simulator''', is a [[Free Software]] integrated schematic capture and simulation tool for digital and analog signals. It supports DC, transient, AC and digital simulations as well as parameter sweeping. It does not currently support Monte Carlo simulations, although with some crude Bash and [[QtOctave]] work, this can be overcome. If you don't mind using extra tools for Monte Carlo simulation and are willing to fudge the exact model of op-amps used in [[Lab-in-a-Box]] projects, Qucs and be used to complete assignments in [[ECE 2074 Electric Circuit Analysis Laboratory]].		'''Qucs''', the '''Quite Universal Circuit Simulator''', is a [[Free Software]] integrated schematic capture and simulation tool for digital and analog signals. It supports DC, transient, AC and digital simulations as well as parameter sweeping. It does not currently support Monte Carlo simulations, although with some crude Bash and [[QtOctave]] work, this can be overcome. If you don't mind using extra tools for Monte Carlo simulation and are willing to fudge the exact model of op-amps used in [[Lab-in-a-Box]] projects, Qucs and be used to complete assignments in [[ECE 2074 Electric Circuit Analysis Laboratory]].