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From: Keith Roberts <keith@ka...>  20110404 17:39:25

Greetings everyone. I have a schematic I'd like to run through Qucs, and then develop the design on a solderless breadboard, as in: http://en.wikipedia.org/wiki/Breadboard Is there a way to design a schematic so it looks exactly like a solderless breadboard layout please? Are there any sort of 'line' components that I could use for doing this in Qucs? What I really need is a 'solderless breadboard template' to use as the layout grid in the GUI. Is there such a thing in Qucs? Or can I create such a template in Qucs, and reuse that in Qucs for my breadboard layout? Obviously I want to run a simulation on the finished schematic using Qucs, so it needs to be a valid circuit diagram. Kind Regards, Keith Roberts  Websites: http://www.karsites.net http://www.phpdebuggers.net http://www.raisedfromthedead.org.uk All email addresses are challengeresponse protected with TMDA [http://tmda.net]  
From: Carsten Koegler <ckoegler@cb...>  20110404 11:54:16

Hello Stefan, Thank you very much. That works indeed. Best regards. Carsten  Carsten Kögler MaxPlanckInstitute for Human Cognitive and Brain Sciences Stephanstr. 1a, 04103 Leipzig, Germany Ph: ++493419940 2427  Original Message  > From: "Stefan Jahn" <stefan@...> > To: "Carsten Koegler" <ckoegler@...> > Cc: qucshelp@... > Sent: Monday, April 4, 2011 11:41:16 AM > Subject: Re: [Qucshelp] coupled variables > Am Mo, 4.04.2011, 10:01 schrieb Carsten Koegler: > > HellO! > > >> > In an optimization, can I assign a value to a capacitor, that is > >> > not > >> > equal to a variable, but depends on 2 variables? > >> > > >> > I use Qucs and ASCO to optimize 5 capacitors in a SParameter > >> > simulation > >> > and have some problems with converging the optimization. > >> > Out of previous insight it is known, that 2 of the capacitors > >> > will > >> > have > >> > only slightly different value. So I thought, instead of having 2 > >> > variables > >> > in my optimization > >> >  cap1 > >> >  cap2 > >> > > >> > I should better have > >> >  cap_mean > >> >  cap_offset > >> > > >> > cap_mean will have the value range as before, but cap_offset > >> > will have a much smaller value range and thus helping me > >> > converging > >> > the > >> > optimization. > >> > > >> > But I can't assign a capacitor in the schematic a value > >> > C=cap_mean+cap_offset. > >> > This gives > >> >>>>>>>>>>>>> > >> > line 18: syntax error, unrecognized character: `+' > >> > line 18: syntax error, unexpected InvalidCharacter, expecting '"' > >> > <<<<<<<<<<<< > >> > >> For this I suggest to introduce an equation block with > >> cap1 = cap_mean+cap_offset > >> and setting C = cap1 into the property of the capacitor. > >> > >> Best regards, Stefan. > > > > > > Mmmh. Assigning a single optimization variable to an equation works, > > but > > not > > equation = variable1 + variable2 ?? > > > > <Qucs Schematic 0.0.16> > > <Properties> > > <View=0,60,1411,1081,0.909091,0,0> > > <Grid=10,10,1> > > <DataSet=coupled_variables.dat> > > <DataDisplay=coupled_variables.dpl> > > <OpenDisplay=0> > > <Script=coupled_variables.m> > > <RunScript=0> > > <showFrame=0> > > <FrameText0=Title> > > <FrameText1=Drawn By:> > > <FrameText2=Date:> > > <FrameText3=Revision:> > > </Properties> > > <Symbol> > > </Symbol> > > <Components> > > <R R1 1 790 110 15 26 0 1 "50 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 > > "26.85" > > 0 "european" 0> > > <C C1 1 500 80 26 17 0 0 "c_match_equation" 1 "" 0 "neutral" 0> > > <.Opt Opt1 1 110 320 0 43 0 0 "Sim=SP1" 0 > > "DE=3102200.85131e610100" 0 > > "Var=c_match_baseyes7.736736E1400.1e12LIN_DOUBLE" 0 > > "Var=c_match_diffyes6.553473E1400.1e12LIN_DOUBLE" 0 > > "Goal=S11_dBLE50" 0> > > <.SP SP1 1 110 420 0 71 0 0 "lin" 1 "300MHz" 1 "301MHz" 1 "2" 1 > > "no" 0 > > "1" 0 "2" 0 "no" 0 "no" 0> > > <Eqn Eqn_FAIL 1 640 310 31 17 0 0 > > "c_match_equation=c_match_base+c_match_diff" 1 "yes" 0> > > <Eqn Eqn3 1 320 340 31 17 0 0 "S11_dB=dB(yvalue(S[1,1],300e6))" 1 > > "yes" > > 0> > > <Pac P1 1 90 180 18 26 0 1 "1" 1 "50 Ohm" 1 "0 dBm" 0 "300 MHz" 0 > > "26.85" 0> > > <Eqn Eqn_WORKS 0 640 420 31 17 0 0 > > "c_match_equation=c_match_base" 1 > > "yes" 0> > > </Components> > > <Wires> > > <90 210 90 260 "" 0 0 0 ""> > > <90 260 790 260 "" 0 0 0 ""> > > <790 140 790 260 "" 0 0 0 ""> > > <530 80 790 80 "" 0 0 0 ""> > > <90 80 90 150 "" 0 0 0 ""> > > <90 80 470 80 "" 0 0 0 ""> > > </Wires> > > <Diagrams> > > <Tab 600 672 335 72 3 #c0c0c0 1 00 1 0 1 1 1 0 1 1 1 0 1 1 315 0 > > 225 "" > > "" ""> > > <"c_match_equation" #0000ff 0 3 1 0 0> > > </Tab> > > </Diagrams> > > <Paintings> > > </Paintings> > > Attached the working setup... (I hope) > > Best regards, Stefan. 
From: Keith Roberts <keith@ka...>  20110404 11:11:39

Hi All. I found this onestop website for semiconductor data sheets. Many different PDF data sheets from most manufacturers. http://www.datasheetcatalog.com Kind Regards, Keith Roberts  Websites: http://www.karsites.net http://www.phpdebuggers.net http://www.raisedfromthedead.org.uk All email addresses are challengeresponse protected with TMDA [http://tmda.net]  
From: Stefan Jahn <stefan@gr...>  20110404 09:41:23

Am Mo, 4.04.2011, 10:01 schrieb Carsten Koegler: HellO! >> > In an optimization, can I assign a value to a capacitor, that is not >> > equal to a variable, but depends on 2 variables? >> > >> > I use Qucs and ASCO to optimize 5 capacitors in a SParameter >> > simulation >> > and have some problems with converging the optimization. >> > Out of previous insight it is known, that 2 of the capacitors will >> > have >> > only slightly different value. So I thought, instead of having 2 >> > variables >> > in my optimization >> >  cap1 >> >  cap2 >> > >> > I should better have >> >  cap_mean >> >  cap_offset >> > >> > cap_mean will have the value range as before, but cap_offset >> > will have a much smaller value range and thus helping me converging >> > the >> > optimization. >> > >> > But I can't assign a capacitor in the schematic a value >> > C=cap_mean+cap_offset. >> > This gives >> >>>>>>>>>>>>> >> > line 18: syntax error, unrecognized character: `+' >> > line 18: syntax error, unexpected InvalidCharacter, expecting '"' >> > <<<<<<<<<<<< >> >> For this I suggest to introduce an equation block with >> cap1 = cap_mean+cap_offset >> and setting C = cap1 into the property of the capacitor. >> >> Best regards, Stefan. > > > Mmmh. Assigning a single optimization variable to an equation works, but > not > equation = variable1 + variable2 ?? > > <Qucs Schematic 0.0.16> > <Properties> > <View=0,60,1411,1081,0.909091,0,0> > <Grid=10,10,1> > <DataSet=coupled_variables.dat> > <DataDisplay=coupled_variables.dpl> > <OpenDisplay=0> > <Script=coupled_variables.m> > <RunScript=0> > <showFrame=0> > <FrameText0=Title> > <FrameText1=Drawn By:> > <FrameText2=Date:> > <FrameText3=Revision:> > </Properties> > <Symbol> > </Symbol> > <Components> > <R R1 1 790 110 15 26 0 1 "50 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" > 0 "european" 0> > <C C1 1 500 80 26 17 0 0 "c_match_equation" 1 "" 0 "neutral" 0> > <.Opt Opt1 1 110 320 0 43 0 0 "Sim=SP1" 0 > "DE=3102200.85131e610100" 0 > "Var=c_match_baseyes7.736736E1400.1e12LIN_DOUBLE" 0 > "Var=c_match_diffyes6.553473E1400.1e12LIN_DOUBLE" 0 > "Goal=S11_dBLE50" 0> > <.SP SP1 1 110 420 0 71 0 0 "lin" 1 "300MHz" 1 "301MHz" 1 "2" 1 "no" 0 > "1" 0 "2" 0 "no" 0 "no" 0> > <Eqn Eqn_FAIL 1 640 310 31 17 0 0 > "c_match_equation=c_match_base+c_match_diff" 1 "yes" 0> > <Eqn Eqn3 1 320 340 31 17 0 0 "S11_dB=dB(yvalue(S[1,1],300e6))" 1 "yes" > 0> > <Pac P1 1 90 180 18 26 0 1 "1" 1 "50 Ohm" 1 "0 dBm" 0 "300 MHz" 0 > "26.85" 0> > <Eqn Eqn_WORKS 0 640 420 31 17 0 0 "c_match_equation=c_match_base" 1 > "yes" 0> > </Components> > <Wires> > <90 210 90 260 "" 0 0 0 ""> > <90 260 790 260 "" 0 0 0 ""> > <790 140 790 260 "" 0 0 0 ""> > <530 80 790 80 "" 0 0 0 ""> > <90 80 90 150 "" 0 0 0 ""> > <90 80 470 80 "" 0 0 0 ""> > </Wires> > <Diagrams> > <Tab 600 672 335 72 3 #c0c0c0 1 00 1 0 1 1 1 0 1 1 1 0 1 1 315 0 225 "" > "" ""> > <"c_match_equation" #0000ff 0 3 1 0 0> > </Tab> > </Diagrams> > <Paintings> > </Paintings> Attached the working setup... (I hope) Best regards, Stefan. 
From: Carsten Koegler <ckoegler@cb...>  20110404 08:01:37

> > Hello > > Hi! > > > In an optimization, can I assign a value to a capacitor, that is not > > equal to a variable, but depends on 2 variables? > > > > I use Qucs and ASCO to optimize 5 capacitors in a SParameter > > simulation > > and have some problems with converging the optimization. > > Out of previous insight it is known, that 2 of the capacitors will > > have > > only slightly different value. So I thought, instead of having 2 > > variables > > in my optimization > >  cap1 > >  cap2 > > > > I should better have > >  cap_mean > >  cap_offset > > > > cap_mean will have the value range as before, but cap_offset > > will have a much smaller value range and thus helping me converging > > the > > optimization. > > > > But I can't assign a capacitor in the schematic a value > > C=cap_mean+cap_offset. > > This gives > >>>>>>>>>>>>> > > line 18: syntax error, unrecognized character: `+' > > line 18: syntax error, unexpected InvalidCharacter, expecting '"' > > <<<<<<<<<<<< > > For this I suggest to introduce an equation block with > cap1 = cap_mean+cap_offset > and setting C = cap1 into the property of the capacitor. > > Best regards, Stefan. Mmmh. Assigning a single optimization variable to an equation works, but not equation = variable1 + variable2 ?? <Qucs Schematic 0.0.16> <Properties> <View=0,60,1411,1081,0.909091,0,0> <Grid=10,10,1> <DataSet=coupled_variables.dat> <DataDisplay=coupled_variables.dpl> <OpenDisplay=0> <Script=coupled_variables.m> <RunScript=0> <showFrame=0> <FrameText0=Title> <FrameText1=Drawn By:> <FrameText2=Date:> <FrameText3=Revision:> </Properties> <Symbol> </Symbol> <Components> <R R1 1 790 110 15 26 0 1 "50 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0> <C C1 1 500 80 26 17 0 0 "c_match_equation" 1 "" 0 "neutral" 0> <.Opt Opt1 1 110 320 0 43 0 0 "Sim=SP1" 0 "DE=3102200.85131e610100" 0 "Var=c_match_baseyes7.736736E1400.1e12LIN_DOUBLE" 0 "Var=c_match_diffyes6.553473E1400.1e12LIN_DOUBLE" 0 "Goal=S11_dBLE50" 0> <.SP SP1 1 110 420 0 71 0 0 "lin" 1 "300MHz" 1 "301MHz" 1 "2" 1 "no" 0 "1" 0 "2" 0 "no" 0 "no" 0> <Eqn Eqn_FAIL 1 640 310 31 17 0 0 "c_match_equation=c_match_base+c_match_diff" 1 "yes" 0> <Eqn Eqn3 1 320 340 31 17 0 0 "S11_dB=dB(yvalue(S[1,1],300e6))" 1 "yes" 0> <Pac P1 1 90 180 18 26 0 1 "1" 1 "50 Ohm" 1 "0 dBm" 0 "300 MHz" 0 "26.85" 0> <Eqn Eqn_WORKS 0 640 420 31 17 0 0 "c_match_equation=c_match_base" 1 "yes" 0> </Components> <Wires> <90 210 90 260 "" 0 0 0 ""> <90 260 790 260 "" 0 0 0 ""> <790 140 790 260 "" 0 0 0 ""> <530 80 790 80 "" 0 0 0 ""> <90 80 90 150 "" 0 0 0 ""> <90 80 470 80 "" 0 0 0 ""> </Wires> <Diagrams> <Tab 600 672 335 72 3 #c0c0c0 1 00 1 0 1 1 1 0 1 1 1 0 1 1 315 0 225 "" "" ""> <"c_match_equation" #0000ff 0 3 1 0 0> </Tab> </Diagrams> <Paintings> </Paintings> 
From: Stefan Jahn <stefan@gr...>  20110404 06:50:48

Am Fr, 25.03.2011, 14:28 schrieb Carsten Koegler: > Hello Hi! > In an optimization, can I assign a value to a capacitor, that is not > equal to a variable, but depends on 2 variables? > > I use Qucs and ASCO to optimize 5 capacitors in a SParameter simulation > and have some problems with converging the optimization. > Out of previous insight it is known, that 2 of the capacitors will have > only slightly different value. So I thought, instead of having 2 variables > in my optimization >  cap1 >  cap2 > > I should better have >  cap_mean >  cap_offset > > cap_mean will have the value range as before, but cap_offset > will have a much smaller value range and thus helping me converging the > optimization. > > But I can't assign a capacitor in the schematic a value > C=cap_mean+cap_offset. > This gives >>>>>>>>>>>>> > line 18: syntax error, unrecognized character: `+' > line 18: syntax error, unexpected InvalidCharacter, expecting '"' > <<<<<<<<<<<< For this I suggest to introduce an equation block with cap1 = cap_mean+cap_offset and setting C = cap1 into the property of the capacitor. Best regards, Stefan. 
From: Stefan Jahn <stefan@gr...>  20110404 06:46:57

Am So, 27.03.2011, 13:17 schrieb Dominique NICOLAS: > Hello, Hi! > I am a young French user of Qucs studying electrical engineering. I > recently correctly used Qucs while it was not possible for me to run it > without "bug" in the past (this is now resolved). Since I successfully > achieved a simulation with it I became a fan of Qucs and its > possibilities. I am only a young student  so I cannot pretend to know > plenty of things about electrical engineering  but it looks very > amazing and powerful! I would want to congratulate you and your team for > your work. > > I would also want to know something about Qucs' possibilities. I know it > is very ambitious but not complete yet  I cannot help you because of a > lack of knowledges about "highlevel" programming and electrical > engineering (and time !) but I morally suppport you ! I recently wanted > to simulate a circuit needing a triangular source but it was not > available in the list. I was forced to use a SPICEbased software with a > such source to simulate my circuit, and I thought it was a shame. > So is there a project to give Qucs a triangular source as well as the > rectangular source ? There are pulse current and voltage sources, which can be used to form triangular and rectangular waveforms. Best regards, Stefan. 
From: Stefan Jahn <stefan@gr...>  20110404 06:44:18

Am Mo, 28.03.2011, 12:05 schrieb P.Arun: Hello! > Where do I get a square or triangular voltage source? Or in equation, can > I > define a triangular or square function? You can use the pulse/periodic sources for square and triangular voltage and current waveforms. Best regards, Stefan. 