digital electronics
<electronics> The implementation of two-valued logic using electronic
logic gates such as and gates, or gates and flip-flops. In such circuits the
logical values true and false are represented by two different voltages, e.g. 0V
for false and +5V for true. Similarly, numbers are normally represented in
binary using two different voltages to represented zero and one.
Digital electronics contrasts with analogue electronics which represents
continuously varying quantities like sound pressure using continuously varying
voltages.
Digital electronics is the foundation of modern computers and digital
communications. Massively complex digital logic circuits with millions of gates
can now be built onto a single integrated circuit such as a microprocessor and
these circuits can perform millions of operations per second.
(2006-01-14)
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