Talk:Bridge circuit

This article should be merged with the 'Wheatstone Bridge' article, as they are equivalent.--Ergman 23:29, 21 September 2007 (UTC)

I disagree. The concept of a bridge is a key idea in circuit design in general, there is really a lot to say. I think the wheatstone bridge article should be revised to focus on the historical aspects and its use as a resistance measuring device, and this article should be developed further. I left a note on the wheatstone talk page the other day about the need to discuss balance as a concept. I now think it could be better done here. We could then, for instance, relate bridges to the even more general concept of differential measurement.

--AJim (talk) 04:17, 31 October 2008 (UTC)


 * I support that, Wheatstone bridge is far from the only, or even main, kind of bridge circuit. The bridge is a circuit topology that is not necessarily either balanced (for instance the lattice filter) nor linear (for instance the voltage doubler).  Merging it here would unbalance ('scuse pun) the article which should be discussing bridges in general.  Sp in ni  ng  Spark  21:10, 31 October 2008 (UTC)

Etymology
How did the term for bridge circuits come about? 204.210.242.157 (talk) 23:36, 19 January 2009 (UTC)

Proposed New Definition
The current definition is written: "A bridge circuit is a type of electrical circuit in which the current in a conductor splits into two parallel paths and then recombines into a single conductor, thereby enclosing a loop."

I would argue that two resistors in parallel meet that criteria. Yet nobody would say that two parallel resistors constitute a bridge circuit.

The definition needs to be changed, but it's not easy to figure out what it should be. The best I can come up with is: "A bridge circuit is a type of electrical circuit with two parallel paths, in which the output signal, Vout, is either (a) measured at a node through which not all of the current flows, or (b) the difference between voltages in each of the two parallel paths.

That's a laborious definition, so there has got to be a better way to explain this. But to see why I wrote it this way, consider these circuits:

(1) Two parallel resistors does NOT constitute a bridge cricuit.

(2) A bridge T circuit IS a bridge, in which the output voltage is measured between a node and ground, where the voltage at the non-ground node does not get all the current. (case a, above)

(3) A Wheatstone bridge IS a bridge, in which the output voltage is the difference between the difference between voltages in each of the two parallel paths. (case b, above).

Anybody else have a thought on this? I don't know the best definition, but I know the way it's written now isn't right. —Preceding unsigned comment added by 65.216.74.168 (talk) 13:18, 19 March 2010 (UTC)


 * Quite right, that was a sloppy piece of writing on my part. I'll fix it.  Sp in ni ng  Spark  15:17, 3 April 2010 (UTC)
 * Actually, just seen from the history that it was not me who wrote that (phew!) but I'll fix it anyway.  Sp in ni ng  Spark  15:27, 3 April 2010 (UTC)

Lattice Bridge
In the Gallery section the Lattice Bridge internal link takes you to an unrelated Lattice Truss artical. I don't know how to change the link to the Lattice Phase Equilizer artical without changing the caption title.Halconen (talk) 19:40, 1 December 2010 (UTC)

Auto-balancing bridge
I planned to create a short wikipedia page dealing with the auto-balancing bridge technique that is now the most used technique in impedance meters (RLC measurements including high-Q values), what do you think ? --Henri BONDAR (talk) 09:56, 7 March 2016 (UTC)