B
boingoman
New member
The relevant sentence of that wiki appears at the top:
"The factual accuracy of this article or section is disputed."
The original meaning of balanced was that both sides of the circuit had the same impedance so that interference (noise) would appear at the differential input at the same amplitude, and therefore be rejected. It had nothing to do with signal symmetry.
It has become common belief and usage that it has something to do with inverting the signal on the second conductor. Which is fine, as long as you understand that signal symmetry has NOTHING to do with noise rejection.
One really effective balanced output is called the impedance balanced output. The second conductor isn't even hooked to the output device. It's hooked to grounded through a resistor.
"The factual accuracy of this article or section is disputed."
The original meaning of balanced was that both sides of the circuit had the same impedance so that interference (noise) would appear at the differential input at the same amplitude, and therefore be rejected. It had nothing to do with signal symmetry.
It has become common belief and usage that it has something to do with inverting the signal on the second conductor. Which is fine, as long as you understand that signal symmetry has NOTHING to do with noise rejection.
One really effective balanced output is called the impedance balanced output. The second conductor isn't even hooked to the output device. It's hooked to grounded through a resistor.