Differential pair - Revision history

Jnc: Add some links

2025-07-23T10:46:32Z

Add some links

Jnc: Cover plain differential

2023-05-14T13:29:48Z

Cover plain differential

Jnc: better name

2018-12-14T03:10:26Z

better name

Jnc: +cat

2018-12-14T01:10:24Z

+cat

Jnc: fix number agreement

2018-05-22T11:29:59Z

fix number agreement

Jnc: Avoid redir

2018-05-21T23:56:07Z

Avoid redir

Jnc: Better presentation order

2018-05-21T23:48:27Z

Better presentation order

Jnc: A good start

2018-05-21T20:46:10Z

A good start

New page

A '''differential pair''' (or '''differential signalling''') is a way of sending a signal that has a number of advantages:

* It can use lower [[voltage]]s to achieve a given [[signal-to-noise ratio]]
* It is less susceptible to interference
* It produces less interference
* It allows connecting two entities without having to have a common [[ground]]

It consists of sending two 'copies' of a signal down a pair of [[conductor]]s (a [[balanced pair]], for best results); one signal is the inversion of the other. At the destination, the second is subtracted from the first; any noise that has been picked up in common on both conductors is thereby removed.

This reduction in noise allows use of a lower voltage to send a signal. Also, since the return path for the [[current]] of the signal in the first conductor is not ground, but the inverse current in the second conductor, this tends to cancel any electro-magnetic radiation from that current.

@@ Line 4: / Line 4: @@
 * It can use lower [[voltage]]s to achieve a given [[signal-to-noise ratio]]
-* It is less susceptible to interference
+* It is less susceptible to [[interference]]
 * It produces less interference
 * It allows connecting two entities without having to have a common [[ground]]
-Any noise that has been picked up in common on both conductors is removed when one is subtracted from the other; this reduction in noise allows use of a lower voltage to send a signal. Also, since the return path for the [[current]] of the signal in the first conductor is not ground, but the inverse current in the second conductor, this tends to cancel any electro-magnetic radiation from those currents.
+Any noise that has been picked up in common on both conductors is removed when one is subtracted from the other; this reduction in noise allows use of a lower voltage to send a signal. Also, since the return path for the [[current]] of the signal in the first conductor is not ground, but the inverse current in the second conductor, this tends to cancel any [[electro-magnetic radiation]] from those currents.
 ==See also==

← Older revision		Revision as of 13:29, 14 May 2023
Line 1:		Line 1:
−	A '''differential pair''' (or '''differential signalling''') is a way of sending a signal: it consists of sending two 'copies' of a signal, one an inversion of the other, down a pair of [[conductor]]s; a [[balanced pair]], for best results. At the destination, the second is subtracted from the first.	+	A '''differential pair''' (or '''differential signalling''') is a way of sending a [[signal]]: it consists of sending two 'copies' of a signal, one an inversion of the other, down a pair of [[conductor]]s; a [[balanced pair]], for best results. At the destination, the second is subtracted from the first. 'Differential' is also used to refer to a scheme where there is a separate [[signal return]] [[ground]] for each signal; although different in [[analog]] detail, the fundamentals and advantages are basically the same.

	This approach has a number of advantages:		This approach has a number of advantages:

← Older revision		Revision as of 03:10, 14 December 2018
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	* [[Single-ended signalling]]		* [[Single-ended signalling]]

−	[[Category: ~~Electricity~~]]	+	[[Category: Electrical]]

← Older revision		Revision as of 01:10, 14 December 2018
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	* [[Single-ended signalling]]		* [[Single-ended signalling]]
		+
		+	[[Category: Electricity]]

@@ Line 8: / Line 8: @@
 * It allows connecting two entities without having to have a common [[ground]]
-Any noise that has been picked up in common on both conductors is removed when one is subtracted from the other; this reduction in noise allows use of a lower voltage to send a signal. Also, since the return path for the [[current]] of the signal in the first conductor is not ground, but the inverse current in the second conductor, this tends to cancel any electro-magnetic radiation from that current.
+Any noise that has been picked up in common on both conductors is removed when one is subtracted from the other; this reduction in noise allows use of a lower voltage to send a signal. Also, since the return path for the [[current]] of the signal in the first conductor is not ground, but the inverse current in the second conductor, this tends to cancel any electro-magnetic radiation from those currents.
 ==See also==
 * [[Single-ended signalling]]

← Older revision		Revision as of 23:56, 21 May 2018
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	==See also==		==See also==

−	* [[Single-ended ~~signaling~~]]	+	* [[Single-ended signalling]]

@@ Line 1: / Line 1: @@
-A '''differential pair''' (or '''differential signalling''') is a way of sending a signal that has a number of advantages:
+A '''differential pair''' (or '''differential signalling''') is a way of sending a signal: it consists of sending two 'copies' of a signal, one an inversion of the other, down a pair of [[conductor]]s; a [[balanced pair]], for best results. At the destination, the second is subtracted from the first.
 * It can use lower [[voltage]]s to achieve a given [[signal-to-noise ratio]]
@@ Line 6: / Line 8: @@
 * It allows connecting two entities without having to have a common [[ground]]
-It consists of sending two 'copies' of a signal down a pair of [[conductor]]s (a [[balanced pair]], for best results); one signal is the inversion of the other. At the destination, the second is subtracted from the first; any noise that has been picked up in common on both conductors is thereby removed.
+Any noise that has been picked up in common on both conductors is removed when one is subtracted from the other; this reduction in noise allows use of a lower voltage to send a signal. Also, since the return path for the [[current]] of the signal in the first conductor is not ground, but the inverse current in the second conductor, this tends to cancel any electro-magnetic radiation from that current.
-This reduction in noise allows use of a lower voltage to send a signal. Also, since the return path for the [[current]] of the signal in the first conductor is not ground, but the inverse current in the second conductor, this tends to cancel any electro-magnetic radiation from that current.
+* [[Single-ended signaling]]