Re: [Qucs-help] About Qucs From: Stefan Jahn - 2007-01-25 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 time-domain SPICE. The handling non-linear 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 S-parameter analysis I am not sure what "the advantage at Qucs is to handle the linear parts against the time-domain 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 >>> non-linear parts. how does Qucs handle non-linear parts ? >> >>It depends. >> >>In the small-signal frequency domain non-linear parts are previously >>linearized using DC analysis (operating point). >> >>Non-linear analysis is done using Newton-Raphson 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. :-( ```

 [Qucs-help] Re: About Qucs From: Stefan Jahn - 2006-01-04 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 Ampere-Meter (lumped components). Michael: What do you think about the voltmeter? Cheers, Stefan. ```
 Re: [Qucs-help] Re: About Qucs From: - 2006-01-04 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 Ampere-Meter (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 ```
 Re: [Qucs-help] Re: About Qucs From: Stefan Jahn - 2006-01-04 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 Ampere-Meter (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. ```
 Re: [Qucs-help] Re: About Qucs From: - 2006-01-05 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 Ampere-Meter (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 ```
 [Qucs-help] Re: About Qucs From: Mustafa Baser - 2006-01-05 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 ```
 Re: [Qucs-help] Re: About Qucs From: Stefan Jahn - 2006-01-05 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. ```
 Re: [Qucs-help] About Qucs From: Stefan Jahn - 2007-01-23 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 > non-linear parts. how does Qucs handle non-linear parts ? It depends. In the small-signal frequency domain non-linear parts are previously linearized using DC analysis (operating point). Non-linear analysis is done using Newton-Raphson 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. ```
 Re: [Qucs-help] About Qucs From: Takao Komatsuzaki - 2007-01-25 09:43:47 ```Hi Stefan, thanks. So, the advantage at Qucs is to handle the linear parts against the time-domain SPICE. The handling non-linear 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 >> non-linear parts. how does Qucs handle non-linear parts ? > >It depends. > >In the small-signal frequency domain non-linear parts are previously >linearized using DC analysis (operating point). > >Non-linear analysis is done using Newton-Raphson 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) 2-1-6 Sengen C-A-13 Tsukuba R&D Support Center Tsukuba-shi, Ibaraki pref., Japan, 305-0047 (URL) http://www.or-tech.co.jp (TEL) +81-29-858-6116 (FAX) +81-29-858-6116 -========================================================- ```
 Re: [Qucs-help] About Qucs From: Stefan Jahn - 2007-01-25 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 time-domain SPICE. The handling non-linear 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 S-parameter analysis I am not sure what "the advantage at Qucs is to handle the linear parts against the time-domain 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 >>> non-linear parts. how does Qucs handle non-linear parts ? >> >>It depends. >> >>In the small-signal frequency domain non-linear parts are previously >>linearized using DC analysis (operating point). >> >>Non-linear analysis is done using Newton-Raphson 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. :-( ```