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{{main|one-hot}}
A special case of constant weight codes are the one-of-N codes, that encode <math>log_2 N</math> bits in a code-word of <math>N</math> bits. The one-of-two code uses the code words 01 and 10 to encode the bits '0' and '1'. a one-of-four code can use the words 0001, 0010, 0100, 1000 in order to encode two bits 00, 01, 10, and 11. An example is [[dual rail encoding]], and chain link <ref>{{cite
| title=System-on-Chip Design using Self-timed Networks-on-Chip
| url=http://www.silistix.com/members/privatePapers/designwave2.pdf
| coauthors=W.J.Bainbridge, A.Bardsley, R.W.McGuffin
}}</ref> used in delay insensitive circuits.
== References ==
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