Also called a line conditioner
, a device
that sits between a computer and its power supply
, typically a wall outlet. The power conditioner provides protection against surges in power just as a surge protector
does, but a power conditioner also maintains a continuous voltage fed to the computer during temporary voltage reductions, such as a brownout. This is referred to as conditioning
. Power conditioners also can filter EMI
emanating from a power source and can smooth the rhythmic cycle of alternating current.