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What is "Balanced"?

    https://www.sweetwater.com/insync/balanced/#:~:text=This%20phenomenon%20is%20called%20%E2%80%9CCommon%20Mode%20Rejection%E2%80%9D%20and,out%20of%20phase%20with%20itself%2C%20and%20gets%20cancelled.
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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

What is "Common Mode Rejection"? - inSync

    https://www.sweetwater.com/insync/common-mode-rejection/
    This CMR (Common Mode Rejection) is the principle that caused balanced lines to be invented in the first place. Nowadays it applies not only to various types of audio signals, but it is the underlying principle of balanced AC power systems as well. See also CMRR.

Are Balanced Audio Cables Better? - Moon Audio

    https://www.moon-audio.com/are-balanced-cables-better
    This is called Common-Mode Rejection due to the noise being the 'common' signal between the send and receive lines. All balanced cables utilize common-mode rejection. However, common-mode rejection is not really "balanced”; it more so describes the function of how the dual lines work to cancel out external noises in that signal. Oftentimes common-mode …

Common mode rejection – PS Audio

    https://www.psaudio.com/pauls-posts/common-mode-rejection/
    This process is called Common Mode Rejection Ratio or CMRR and it is used to eliminate noise and hum which can be common to a signal. CMRR is most often taken advantage of in XLR balanced cables but it can also be used in single ended RCA cables as well. How does this work? Imagine a two-wire cable going from a turntable to a preamplifier.

Design of High-Performance Balanced Audio Interfaces

    https://sound-au.com/articles/balanced-interfaces.pdf
    common-mode impedance balance of the driver, line, and receiver play a role in noise or interference rejection. This noise or interference rejection property is independent of the presence of a desired differential signal. Therefore, it can make no difference whether the desired signal exists entirely on one line, as a greater voltage on

Balanced connection vs unbalanced: What's the difference ...

    https://soundguys.com/balanced-vs-unbalanced-connections-60085/
    The concept relies on the balanced input stage of the receiving equipment amplifying only the difference between the hot and cold lines, meaning anything common to both lines is rejected. How well this is achieved is defined by the common-mode rejection ratio . Since the cable’s two conductors are twisted together, it means they effectively occupy the same …

Baluns, Balance, and Differential Signaling

    https://www.markimicrowave.com/assets/engineering_support/webinar_baluns_balance_differential_signals.pdf?v=040220
    Common Mode Rejection • Quantifies how much of a signal in the ‘common mode’ of a differential line will be rejected Common Mode Rejection Marki Microwave Inc. 6 Phase Balance Good baluns provide 15-20° Marki baluns provide 5-10° Amplitude Balance Good baluns provide ±2 dB-3 Marki baluns provide ±1 dB-2-1 0 1 2 3 0 1 2 3 4 5 6 7 8 9) Frequency (GHz) 150

Balanced photodetection, explained by RP Photonics ...

    https://www.rp-photonics.com/balanced_photodetection.html
    The mentioned cancellation is called common mode rejection and can be quantified in decibels. One often achieves 50 dB or more. Although a balanced detection setup can be assembled from single components, it can be helpful to use a prefabricated complete assembly, containing matched photodiodes (see below) and the required electronics.

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