From: Stefan Jahn <stefan@gr...>  20070123 09:22:42

Am Sa, 6.01.2007, 12:29, schrieb Takao Komatsuzaki: > Hi Stefan, Hello Takao, sorry for the loooong delay. > I have a basic question about Qucs. > > When it simulates the circuitry which composed of linear parts and > nonlinear parts. how does Qucs handle nonlinear parts ? It depends. In the smallsignal frequency domain nonlinear parts are previously linearized using DC analysis (operating point). Nonlinear analysis is done using NewtonRaphson and derivatives. > Does it translate the model description into other format like that > at the frequency domain ? I am not sure what you are asking for? > Do you support Bsim series ? No, not yet. :( Cheers, Stefan. 
From: Stefan Jahn <stefan@gr...>  20060104 08:54:51

On Di, 27.12.2005, 16:38, Mustafa Baser wrote: > Dear Stefan Jahn, Hello! > I am looking for a circuit simulation software to be used in education. > I am luckily find qucs. I tried some simple circuit designs. Qucs seems to > be more complicated to be used in teaching introductory electric circuit > course. Is it possible simply putting a voltmeter across a resistor and > putting a series ammeter on a line? Are the implementation of these ideas > so > difficult? Actually there is a a AmpereMeter (lumped components). Michael: What do you think about the voltmeter? Cheers, Stefan. 
From: <Michael.M<argraf@al...>  20060104 11:50:44

Hello! >> I am looking for a circuit simulation software to be used in >> education. I am luckily find qucs. I tried some simple circuit >> designs. Qucs seems to >> be more complicated to be used in teaching introductory electric >> circuit >> course. Is it possible simply putting a voltmeter across a resistor >> and putting a series ammeter on a line? Are the implementation of >> these ideas so difficult? > > Actually there is a a AmpereMeter (lumped components). > Michael: What do you think about the voltmeter? All in all I think it is not that bad. It is an easy way to measure differential voltages. Stefan, do you think this is difficult to implement in Qucsator ? Regards, Michael 
From: Stefan Jahn <stefan@gr...>  20060104 12:17:56

On Mi, 4.01.2006, 12:49, Michael.Margraf@... wrote: > Hello! Hi! >>> I am looking for a circuit simulation software to be used in >>> education. I am luckily find qucs. I tried some simple circuit >>> designs. Qucs seems to >>> be more complicated to be used in teaching introductory electric >>> circuit >>> course. Is it possible simply putting a voltmeter across a resistor >>> and putting a series ammeter on a line? Are the implementation of >>> these ideas so difficult? >> >> Actually there is a a AmpereMeter (lumped components). >> Michael: What do you think about the voltmeter? > > All in all I think it is not that bad. It is an easy way to > measure differential voltages. Stefan, do you think this is > difficult to implement in Qucsator ? Hm. Actually this component is an additional (special) equation. With some effort it could be fully implemented in the GUI. The new component (voltmeter) just needs to add a new equation line to the netlist, something like: Eqn:Eqn1 Export="yes" Voltage1.Vt="_net0.Vt_net1.Vt" Following things must be considered meanwhile in the above line: Eqn1  unique identfier in the schematic Voltage1  probably some proberty (or name?) of the voltmeter _net0/_net1  the two nodes the voltmeter is connected to  if one of the nodes is gnd, then "_net0.Vt" ("_net1.Vt") is sufficient (if both "0" is sufficient) .Vt  depending on the kind of simulation(s) Voltage1.Vt="_net0.Vt_net1.Vt" AND/OR Voltage1.V="_net0.V_net1.V" AND/OR Voltage1.v="_net0.v_net1.v" must be added How do you like this idea? Cheers, Stefan. 
From: <Michael.M<argraf@al...>  20060105 07:46:18

Hello, >>>> I am looking for a circuit simulation software to be used in >>>> education. I am luckily find qucs. I tried some simple circuit >>>> designs. Qucs seems to >>>> be more complicated to be used in teaching introductory electric >>>> circuit >>>> course. Is it possible simply putting a voltmeter across a resistor >>>> and putting a series ammeter on a line? Are the implementation of >>>> these ideas so difficult? >>> >>> Actually there is a a AmpereMeter (lumped components). >>> Michael: What do you think about the voltmeter? >> >> All in all I think it is not that bad. It is an easy way to >> measure differential voltages. Stefan, do you think this is >> difficult to implement in Qucsator ? > > Hm. Actually this component is an additional (special) equation. With > some effort it could be fully implemented in the GUI. The new > component (voltmeter) just needs to add a new equation line to the > netlist, something like: > > Eqn:Eqn1 Export="yes" Voltage1.Vt="_net0.Vt_net1.Vt" > > Following things must be considered meanwhile in the above line: > Eqn1 >  unique identfier in the schematic > Voltage1 >  probably some proberty (or name?) of the voltmeter > _net0/_net1 >  the two nodes the voltmeter is connected to >  if one of the nodes is gnd, then "_net0.Vt" ("_net1.Vt") is > sufficient (if both "0" is sufficient) > .Vt >  depending on the kind of simulation(s) > Voltage1.Vt="_net0.Vt_net1.Vt" AND/OR > Voltage1.V="_net0.V_net1.V" AND/OR > Voltage1.v="_net0.v_net1.v" > must be added > > How do you like this idea? This is a problem as a component does not know what simulations have to be run. But I will think about it. Regards, Michael 
From: Mustafa Baser <mbaser@ib...>  20060105 09:20:25

Hello, >>> Eqn:Eqn1 Export="yes" Voltage1.Vt="_net0.Vt_net1.Vt" I don't know about programming in Qt, but I think implementing a voltmeter which measures potential difference between two points seems to be an easy task. The voltmeter object can automatically export the above equation and measures read the result of the calculation. Just an idea. Yours Sincerely. Mustafa Baser 
From: Stefan Jahn <stefan@gr...>  20060105 09:36:49

On Do, 5.01.2006, 09:59, Mustafa Baser wrote: > Hello, Hi! >>>> Eqn:Eqn1 Export="yes" Voltage1.Vt="_net0.Vt_net1.Vt" > > I don't know about programming in Qt, but I think implementing a voltmeter > which measures potential difference between two points seems to be an > easy > task. The voltmeter object can automatically export the above equation and > measures read the result of the calculation. Just an idea. This is exactly which I proposed. Stefan. 
From: Stefan Jahn <stefan@gr...>  20070123 09:22:42

Am Sa, 6.01.2007, 12:29, schrieb Takao Komatsuzaki: > Hi Stefan, Hello Takao, sorry for the loooong delay. > I have a basic question about Qucs. > > When it simulates the circuitry which composed of linear parts and > nonlinear parts. how does Qucs handle nonlinear parts ? It depends. In the smallsignal frequency domain nonlinear parts are previously linearized using DC analysis (operating point). Nonlinear analysis is done using NewtonRaphson and derivatives. > Does it translate the model description into other format like that > at the frequency domain ? I am not sure what you are asking for? > Do you support Bsim series ? No, not yet. :( Cheers, Stefan. 
From: Takao Komatsuzaki <takao_komatsuzaki@or...>  20070125 09:43:47

Hi Stefan, thanks. So, the advantage at Qucs is to handle the linear parts against the timedomain SPICE. The handling nonlinear part is almost same, right ? Best Regards, Takao Komatsuzaki. >Am Sa, 6.01.2007, 12:29, schrieb Takao Komatsuzaki: > >> Hi Stefan, > >Hello Takao, > >sorry for the loooong delay. > >> I have a basic question about Qucs. >> >> When it simulates the circuitry which composed of linear parts and >> nonlinear parts. how does Qucs handle nonlinear parts ? > >It depends. > >In the smallsignal frequency domain nonlinear parts are previously >linearized using DC analysis (operating point). > >Nonlinear analysis is done using NewtonRaphson and derivatives. > >> Does it translate the model description into other format like that >> at the frequency domain ? > >I am not sure what you are asking for? > >> Do you support Bsim series ? > >No, not yet. :( > >Cheers, Stefan. > ======================================================== Takao Komatsuzaki Oscillated Recall Technology inc. (Address) 216 Sengen CA13 Tsukuba R&D Support Center Tsukubashi, Ibaraki pref., Japan, 3050047 (URL) http://www.ortech.co.jp (TEL) +81298586116 (FAX) +81298586116 ======================================================== 
From: Stefan Jahn <stefan@gr...>  20070125 10:01:08

Am Do, 25.01.2007, 10:43, schrieb Takao Komatsuzaki: > Hi Stefan, Hello Takao! > thanks. So, the advantage at Qucs is to handle the linear parts > against the timedomain SPICE. The handling nonlinear part is > almost same, right ? Again I am not sure what you meant. :( The main technical difference between SPICE and Qucs may be that Qucs currently supports 1) certain RF components which SPICE does not have and vice versa 2) direct Sparameter analysis I am not sure what "the advantage at Qucs is to handle the linear parts against the timedomain SPICE" means.... > Linear parts are linear in time as well frequency domain (e.g. resistor) Cheers, Stefan. >>> I have a basic question about Qucs. >>> >>> When it simulates the circuitry which composed of linear parts and >>> nonlinear parts. how does Qucs handle nonlinear parts ? >> >>It depends. >> >>In the smallsignal frequency domain nonlinear parts are previously >>linearized using DC analysis (operating point). >> >>Nonlinear analysis is done using NewtonRaphson and derivatives. >> >>> Does it translate the model description into other format like that >>> at the frequency domain ? >> >>I am not sure what you are asking for? >> >>> Do you support Bsim series ? >> >>No, not yet. :( 