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Old 18th July 2002, 05:21 PM   #1
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Default signal theory

alohaa

ive surfed the net searchin for signal mod theory and found nothin.
idont want schematics. i want to know how components work modifying the signal.
they signals i work with are square, sine, triangle, and guitar signals.
id also want to find theory bout those last ones.

thanx u for ur time

nicolazs
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Old 18th July 2002, 06:56 PM   #2
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Default Know your components

with "components" I mean every
piece of material a signal have to pass in signal path.

it may be Cu copper
it may be Si silicon
it may be Pb lead
it may be Sn

wires, solder points, caps, resistors
all is out of materials

All materials have their own way to react
or not react to , what we call a signal
Signal are electrons, moving
or small packages of energy,
which have to pass the atomic structure
of the materials.

Not only important is the different materials
single responses, but also when they are joined together
with eachother.
Like a beam of sunlight, bends,
when passing from air to water.

So I say study physics.
Know the elements
which we all are made of and you will know
about very many occurances regarding
energy's way to behave.
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Old 18th July 2002, 08:13 PM   #3
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Wink Signal Conductivity Theory

Hi Groman,
Your answer is so philosophical orientated rather than technical or scientific that I almost fell off my chair in front of my computer laughing It almost reads like a poem. There must be something in the Swedish water or is it in the thin air in Lapland were you live...?
I see you know some symbols for the chemical elements but to tell how these "react" to small packets of energy is long way remote from current theory of conductivity of metals and semiconductors. I absolutely don't see any analogy with a beam of sunlight going from one medium (air) to a other medium (water)
BTW I am a chemist by education, University of Groningen, specialised in synthetic organic chemistry. Had to study a lot of physics as part of obligate exams (including the breaking of light and semiconductors theory)

Nico6969, (What's in a number? [double Kamasutra??],) I strongly recommed reading the book by Horowitz and Hill, the Art of Electronics, Cambridge University Press.
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Old 18th July 2002, 08:25 PM   #4
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Default Elso Kwak

I'll take your words for it.
As I have no studies/degree at all.
cheers
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Old 18th July 2002, 08:42 PM   #5
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Cool any analogy with a beam of sunlight going from one medium (air) to a other medium (wa

How about a discontinuity in impedance for a transmission line....
Reflections, change in propagation velocity... I 'll bet there are many analogies that a good EMAG guru could enlighten with. I am just a lowly EE by education.

H.H.
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Old 18th July 2002, 11:44 PM   #6
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Alohaaaaaa,

Depends on what you call signals. Most of us consider them as currents or voltages varying with time. But you can begin to toy with the two main Maxwell's equations, which are apparently so simple and elegant. And split currents into conduction currents and displacement currents. And add the dielectric and magnetic properties of materials, that vary with temperature, frequency, direction, previous conditions (non-linearities) etc... Or consider currents as charge (either electrons or holes) variation with time. Or consider all this stuff from the thermodynamic point of view, as a disturbance in thermodynamic equilibrium. Far too vast to be answered, at least by me

But if a signal for you is the variation of "something" with time, start with Fourier analysis, Laplace transforms, convolution, correlation, filters' theory. It should be a nice basis.
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Old 19th July 2002, 12:28 AM   #7
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Default signals

hi im back .

ok thank you all guys but your answers are a bit weird for me.
im a 17 yrs old kid whos just startin.
ive already built and know how to calculate class a amps.
but now, besides amplify audio signals i wanna distort em.

so if you could recommend me some books or stuff to read id be grateful .

see ya ´
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Old 19th July 2002, 02:24 AM   #8
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Well, distortion can be performed by many linear circuits just by biasing them to distort. Have you tried turning a SE class A amp into a SE class B or AB?? This will distort well. Also, op amps can distort in interesting ways. I don't know of any books or anything, but I know there's lots out there.
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Old 19th July 2002, 02:56 AM   #9
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Default fotenote

Bias=give them a start current
so they can start working
different bias=how hard you let them work

if you carry your schoolbag, you would walk rather normal
but if you carry home your 70 kilos loudspeakers
you would have a bad walk
so is it with caps, resistors, transistors...
If you put an unsuitable strain unto them,
they will not perform as intended

There is however an optimal strain for
electrical komponents,
That would make them disturb the signal as little as possible

That is a knowledge, I find valuable.
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Old 19th July 2002, 03:07 AM   #10
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Jeez, you really are the philosophical type aren't you?
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