The linear regulator is the original form of the regulating power supply. It relies upon the
variable conductivity of an active electronic device to drop voltage from an input voltage
to a regulated output voltage. In accomplishing this, the linear regulator wastes a lot of
power in the form of heat, and therefore gets hot. It is, though, a very electrically “ quiet ”
power supply.
The linear power supply fi nds a very strong niche within applications where its
ineffi ciency is not important. These include wall-powered, ground-base equipment ...
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