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HI every body i want to model a CHB for real time simulation and implement this into FPGA boards. i read some paper about MNA , but i xplorer method for modeling circuit thanks
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Mohammad wrote: > i want to model a CHB for real time simulation I guess that less than 1% in here might guess what you mean by that, since several definitions came to my mind already. Assuming you are meaning a coil's HBcurve, you found somebody who did that, and if you are meaning the concentration of hemoglobin, too. > and implement this into FPGA boards. done > i read some paper about MNA , but i xplorer method for modeling circuit I am not sure if MNA was the right approach in this case, I did that the discrete way in FPGAs for my, but here it depends on your detailed task. In another case, analytical node analysis was the right, but this was done in software. Although FPGAs are fine to process Matrix operations required for MNA, I'd consider to do this in C language to be able to modify algorithms and handle the depth of iterations more easily. Moreover recursive processing is a commonly required method when doing simulation and this refers even more to MNA. You will need strong knowledge and concepts regarding pipelined virtual processing to be able to realize interative (and even recursive processes) in an FPGA effectively.
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Jürgen Schuhmacher wrote: > Mohammad wrote: >> i want to model a CHB for real time simulation > I guess that less than 1% in here might guess what you mean by that, > since several definitions came to my mind already. > > Assuming you are meaning a coil's HBcurve, you found somebody who did > that, and if you are meaning the concentration of hemoglobin, too. > >> and implement this into FPGA boards. > done > >> i read some paper about MNA , but i xplorer method for modeling circuit > I am not sure if MNA was the right approach in this case, I did that the > discrete way in FPGAs for my, but here it depends on your detailed task. > In another case, analytical node analysis was the right, but this was > done in software. > > Although FPGAs are fine to process Matrix operations required for MNA, > I'd consider to do this in C language to be able to modify algorithms > and handle the depth of iterations more easily. Moreover recursive > processing is a commonly required method when doing simulation and this > refers even more to MNA. You will need strong knowledge and concepts > regarding pipelined virtual processing to be able to realize interative > (and even recursive processes) in an FPGA effectively. thanks for your answer my main problem is that finding a reference ? reference for MNA or ADC etc
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Mohammad Mothermohammad wrote: > reference for MNA or ADC etc Don't use TLAs! Write complete and meaningful sentences instead. Otherwise no one even understands the question. And given that, how can you expect a useful answer?
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Mohammad Mothermohammad wrote: > my main problem is that finding a reference No your main problem is, that you still did not describe, WHAT you want to model. This is the first thing to clarify and HOW to model it, was the second question. Please refer to my first sentence in the posting above. Once we know what you mean by CHB there will be people out to help you. Refer also to what Lothar advised to you (LFL) regarding WTCs. People won't google for UTAs just to find out, what you intend to do. In germany for instance MNA is not a commonly used term for ECSs, but they use the german EKA. Anyway, possibly MNA was an approach if there are current branches to investigate which was the case for the assumed magnetic problem. To find the corresponding BCE's we again need to know the focus and also the parameters. In my FMT finally only voltage response was required depending on the frequency input, so the equations simplified to second order differential equations which could be ported into a Clanguage model as well as an ABM block for pSPICE, to make use of a given simulator. Case verification (which will probably your next question after having a solution) was performed by MCA using existent SPICE models for these cases which were particularly adapted to the frequency. You can get an impression here: http://home.arcor.de/juergen.schuhmacher/japarameters.html The other case, I described above, where RTA was performed by an FPGA, made use of modified (discrete) equations based on common KCLs. LOA  ABM = Analog Behavioral Model BCE = Branch Constitutive Equation ECS = electrial circuit simulation ENA = Enhanced Node Analysis FMT = formerly mentioned task KCL = Kirchhoffs Circuit Laws LFL = Lothar's Forum Laws LOA = List of Abbrevations MCA = model coverage analysis MNA = Modified Node Analysis RTA = real time analysis TLA = three letter abbreviation UTA = unknown technical abbrevation WTC = word to clarify  EKA = Erweiterte Knotenanalyse
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Lothar Miller wrote: > Mohammad Mothermohammad wrote: >> reference for MNA or ADC etc I really wonder how these guys want to be engineers or scientists one days without being able to use google or start a scientific research process. If people are not able to explain their questions the right way, google will also be of no help.
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Jürgen S. wrote: > MCA using existent SPICE models for these > cases which were particularly adapted to the frequency. You can get an > impression here: > > http://home.arcor.de/juergen.schuhmacher/japarameters.html Hello Jurgen, i came here when searching for spice models regarding magnetic materials and have found your posting. however the site you are referencing seems to be down. do you have any still information regarding this? thanks a lot