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Designing for high common-mode rejection in balanced audio ...
https://www.ti.com/lit/an/slyt737/slyt737.pdf#:~:text=Balanced%20audio-signal%20transmission%20is%20useful%20in%20many%20envi-ronments%2C,is%20typically%20expressed%20in%20decibels.%20See%20Equation%201.
A New Balanced-Line Receiver Circuit And IC: Part 3 ...
http://www.enjoythemusic.com/magazine/bas/0109/
Instrumentation amplifiers are widely used as balanced-line receivers. The circuit shown in Figure 2 is a standard instrumentation amplifier modified to have its input bias resistors, R1 and R2, bootstrapped. ote that its common-mode gain, from inputs to outputs of A1 and A2, is unity regardless of any differential gain that may be set by RF and RG.
Designing for high common-mode rejection in …
https://www.ti.com/lit/an/slyt737/slyt737.pdf
receiver circuit to reject noise that is common to both signal lines is the common-mode rejection ratio (CMRR) and is typically expressed in decibels. See Equation 1. CMRR dB A A CM DM ( )= ×log 20 (1) where A CM is the line-receiver’s gain for common-mode signals and A DM is the gain for differential signals. Figure 1 represents a typical balanced audio-transmission
Understanding Balanced and Unbalanced - Neat Circuits
https://neatcircuits.com/audio/balanced.htm
phone's receiver. Balanced Audio Circuit This is a typical transformer balanced audio circuit. audio transformers isolate the audio from any part of the ground or chassis. The circuit on the left is the audio source (output) and the circuit on the right is an audio input. This eliminates the possibility of AC hum or buzz from being
Balanced Transmitter and Receiver II
https://sound-au.com/project87.htm
The main trick with a balanced circuit is that the receiver should 'see' the same impedance on each input. It doesn't actually care that much if there is signal on either or both wires (indeed, that is merely an expectation on our part), but even if the wanted signal is only on one wire, any induced noise will still be common mode, and will still be in phase across both wires.
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