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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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Digital Drive Upsamplers, DACs, jitter, shakes and analogue withdrawals, this is it. |
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In Reply to: Thanks! I think I found a better link, though.... posted by John Elison on March 4, 2016 at 13:57:07:
Coaxial cable was patented in 1880 by Oliver Heaviside, a self-taught Post Office employee who designed his invention by math, not experiment.
At a time when the scientific establishment was wasting time, money and energy trying to eliminate inductance, Heaviside, by controlling inductance and making it part of the way the cable functioned, could "resonate" the cable system, with the result of lower attenuation losses and lower distortion.
The economic incentive of course being transatlantic cables.
To accomplish that, he had to reformulate Maxwell's equations into the form they are now taught in. He had to independently formulate vector analysis, and independently invent an operational calculus that was the functional equivalent of Laplace Transforms.
One of the greatest scientific minds of his era, almost ignored in his day.
When radio was invented and it became apparent that radio signals could go beyond the horizon, Heaviside immediately grasped that the upper reaches of the atmosphere must somehow be electrically active, which would reflect oblique signals at an angle equal to the angle of incidence. So, he theorized the necessity of the existence ionosphere... .
jm
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- That's what the math looks like! - John Marks 03/4/1616:31:35 03/4/16 (0)
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