Reply-To: "Kevin Aylward"
From: "Kevin Aylward"
References: <3DC282F0.email@example.com> <3DC2E327.firstname.lastname@example.org>
Subject: Re: how to master electronics, use of transistor, op amp...?
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Date: Sat, 2 Nov 2002 08:35:34 -0000
NNTP-Posting-Date: Sat, 02 Nov 2002 08:35:36 GMT
"Winfield Hill" wrote in message
> Wafer wrote...
> > Please don't confuse skill with talent. Skill is acquired over
> > and involves much work and effort, while talent is there from the
> > beginning. However, lets not get tied up with semantics. I suppose I
> >should have also pointed out my obsession with electronics. ...
> > [ snip ]
> > I would have to say that since Stephen William Hawking concerns
> > himself with theoretical physics and such, he may not be an
> > example of someone who would (or could) design an electronic circuit
> > his head. Besides, it's not a matter of mathematics, or some
> > number of calculations. Rather it is something which I actually
> > difficult to put into words. I just do it. ...
> I find it difficult to design electronic circuits without extensive
> calculations, maybe not always written entirely on paper, but either
> performed in my head or using an ever-present pocket calculator, and
> with the results appearing on paper in one growing schematic drawing,
> or in a set of drawings representing different possible approaches.
> So, it's very hard for me to comprehend designing viable circuits
> without any schematic at all, either on paper or in computer file.
> Perhaps you'd like to try your hand at a design I'm completing now,
> a quiet transresistance preamp (current-to-voltage) that presents
> 5pA current steps as 0.5V voltage-step outputs with a response time
> of 10us or better, with 100pF node capacitance. We'll have to also
> assume you already know the component's parasitic properties to make
> the appropriate selections and modify the design accordingly, right?
> If you quickly finish the design, you'll have time to design a test
> fixture to verify its impressive performance.
> To my mind this type of relatively-simple design cannot be achieved
> entirely in one's head, so it should be a good test for your skill.
For us mere mortals certainly true. But as I noted, there are a scant
truly exceptional people such as Hawking, that are simple amazing with
regard to this. It used to take me a whole weekend using maybe 10 pages
to do the most basic of General Relativity calculations, which Hawking
could do in a few minutes in his head.
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.