Transistors were a tremendous
breakthrough in advancing the computer. However, no one could predict that
thousands even now millions of transistors (circuits) could be compacted in such
a small space. The integrated
circuit, or as it is sometimes referred to as
semiconductor chip, packs a huge
number of transistors onto a single
wafer of silicon. Robert Noyce
of Fairchild Corporation and
Jack Kilby of
Texas Instruments independently discovered the amazing attributes
of integrated circuits. Placing such large numbers of transistors on a
single chip vastly increased the power of a single computer and lowered its cost
considerably.
Since
the invention of integrated circuits, the number of transistors that can be
placed on a single chip has doubled
every two years, shrinking both
the size and cost of computers even further and further enhancing its power.
Most electronic devices today use some form of integrated circuits placed on
printed circuit boards-- thin
pieces of bakelite or
fiberglass that have electrical
connections etched onto them -- sometimes called a
mother board.
A picture of Robert Noyce, a co-inventor, is shown
on the left.
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These third
generation computers could carry out instructions in billionths of a second.
The size of these machines dropped to the size of small file cabinets.
Yet, the single biggest advancement in the computer era was yet to be
discovered.
A
picture of Jack Kilby, a co-inventor, is shown on the left. |