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Re: 1994 article

Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>

Hi Antonio,

I found an interesting paper on the history of circuit analysis when
googling for your Mr. Foster.

http://www.nws.e-technik.tu-muenchen.de/~rapa/publ/emcsr02.pdf

Robert (R. A.) Jones
A1 Accounting, Inc., Fl
407 649 6400
----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, August 10, 2005 2:45 PM
Subject: Re: 1994 article


> Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>
>
> Tesla list wrote:
>
> >Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>
>
> >Do you know when complex (real and imaginary) analysis was first commonly
> >used on such problems?
>
> Phasor analysis was developed essentially by Charles Proteus Steinmetz,
> that published the first description of the method by 1893.
>
> >I did a Google and was surprised that Mr. Laplace presumably the inventor
> >(or did he discover) of Laplace Transforms lived 1749-1827.
> >Almost 200 years ago !!!!
>
> It's not clear to me from where the use of Laplace transforms in
> circuit theory come. It may have been just an application of
> a known method to linear circuits, or a reinvention, later recognized
> as being something already known. I think that the use of Laplace
> transforms in circuit theory become common practice from around
> 1924, with the work of R. M. Foster about reactance synthesis,
> but it was probably used before.
>
> Antonio Carlos M. de Queiroz
>
>
>