I remember seeing Tomorrows World when Micheal Rod showed an early one in the 70's %26amp; he said it would change the world, but where it came from???
Does anyone know how microchips evolved from valve technology, what was inbetween?
I suppose you reffer to semiconductor diodes or valves, as opposed to electron tube valves. Actually, they do the same thing to electricity as a normal valve would do to a fluid - that is allow it to pass in only one sense - from minus to plus.
The TRANSISTOR evolved from the valve and was destined to replace the TRIODE TUBE. The transistor is actually a regulating or piloted valve. Besides the two electrodes there is now a third one, controlling how much the valve is %26quot;opened%26quot; to electric current. This results in the fact that, with a low current applied on the %26quot;pilot%26quot; one could %26quot;regulate%26quot; the amount of current passing through the transistor. This resulted in amplification, one of the most important applications of transistors. Many such transistors, diodes, condensers and resistors were soldered to an insulating piece of material (textile reinforced bachelite was the first one - called textolite) and were joined in between with little strips of copper. That was the printed circuit, thus called because it was obtained by silkscreen printing. Even today it is the base for all our electronic equipment. Most every piece of electronic equipment will contain at least one printed circuit. Printed circuits containing valves and transistors were used in the 60's to power the first industrial grade electronic computers, used to control machines and tools. Later on, starting in the 60's, scientists (Apollo programme had a great part in catalysing this) developed small circuits containing miniaturized transistors, and the necessary circuitry to connect them on a single %26quot;chip%26quot; of silicone. As technology developped they were able to shrink more and more transistors in a small area. Already in 1974, such circuits contained more than 10.000 transistors on a 5 x 5 mm chip of silicone. As densities grew more and more, they were able to %26quot;shrink%26quot; entire computers on one chip. Therefore, they produced the first microprocessors, programmable chips that could perform multiple functions. After that, it all became smaller and smaller. And YES! They DID change our lives, in ways that were almost impossible to imagine even in the early 70's: Mobile phone, flat TVs, personal computers, Internet, GPS. None of these would have been possible without circuit integration and microprocessors
Does anyone know how microchips evolved from valve technology, what was inbetween?
valves evolved into transistors.
It didn't really evolve from the transistor. It does the same job, but it came from a whole different line of research - research specifically to replace the valve.
I don't think Michael Rod had his facts straight.
http://en.wikipedia.org/wiki/Integrated_鈥?/a>
Transistors and printed circuits, wonderful innovation, so
easy to work on if they developed a problem.
Area 51 was in between
valve, transistor, microchip...
its called technological development....
just look at computer development in the last 50 years.... and remember, 50 years ago we didnt even have motorways...
transistors were in between.
A valve can be used as an amplifier or a switch
So can a transistor
A good qualty valve stereo amp has still that much better quality sound than any transistor amplifier
Basicaly a transistor is made from silicon,,some germanium
A simple transistor has three legs
These are called base, emitter, and collector
When you apply a small current to the base a much larger collector emitter curren flows.
Transistors took over the role off valves because of their size..(amonstst other things)
Now itegrated circuits took over from transistors..well in a way they did.( a lot of times you need trannies as well.)
cause they are mostly made of silicon to.. but you can cram a lot of transistors into a small package.
this is known as the silicon chip.
you can etch one hellua lot of transistors onto one chip.
A standard CPU will contain millions of transistors etched onto a thin piece of silicon.
give me a break am gettin thumbs down for correct answer
what child is judging this...
