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In [[telecommunication]] and [[computer data storage|data storage]], '''Manchester code''' (also known as '''phase encoding''', or '''PE''') is a [[line code]] in which the encoding of each data [[bit]] is either low then high, or high then low, for equal time. It is a [[self-clocking signal]] with no [[DC component]]. As a result, electrical connections using a Manchester code are easily [[galvanic isolation|galvanically isolated]].
Manchester code derives its name from its development at the [[University of Manchester]], where the coding was used to store data on the magnetic
Manchester code was widely used for [[magnetic recording]] on 1600 bpi computer tapes before the introduction of 6250 bpi tapes which used the more efficient [[group-coded recording]]. Manchester code was used in early [[Ethernet physical layer]] standards and is still used in [[consumer IR]] protocols, [[RFID]] and [[near-field communication]].
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