Differential signaling | Article about differential signaling by The Free Dictionary
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differential signalingUsing two wires for each electrical path for high immunity to noise and crosstalk. The signals are sent down one wire as positive and the other as negative, and the circuit at the receiving end derives the signal from the difference between the two.
Differential vs. Single-Ended
Differential signaling is superior to single-ended signaling, where the reference voltage is ground and can vary over long distances. In differential signaling, the reference voltage is controlled. Typically, twisted pairs are used so that external radiation impacts both wires at the same place, and the noise can be detected more easily. See LVDS and SCSI.
References in periodicals archive
Popular electrical standards such as USB, Ethernet, RS-485 and CAN use differential signaling
and balanced twisted-pail media to provide reliable high-speed communication.
has been around for a long time, and there is very little chance of it disappearing from the PCB design scene.
allows rejection of cross-talk and ground-bounce as common-mode noise.
The differential signal already has a built-in reference, thus differential signaling
can be used in situations where the driver and receiver do not share the same reference (ground).