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  2. Automatic gain control - Wikipedia

    en.wikipedia.org/wiki/Automatic_gain_control

    Schematic of an AGC used in the analog telephone network; the feedback from output level to gain is effected via a Vactrol resistive opto-isolator.. Automatic gain control (AGC) is a closed-loop feedback regulating circuit in an amplifier or chain of amplifiers, the purpose of which is to maintain a suitable signal amplitude at its output, despite variation of the signal amplitude at the input.

  3. Gain compression - Wikipedia

    en.wikipedia.org/wiki/Gain_compression

    Automatic gain control circuits are intentionally designed to actively change the overall gain in response to the level of the input, resulting in a transfer function that may vary over time. Gain compression on the other hand is a consequence of analog amplifier circuit non-linearities that are generally undesired.

  4. Automixer - Wikipedia

    en.wikipedia.org/wiki/Automixer

    Frank J. Clement and Bell Labs received a patent in 1969 for a multiple-station conference telephone system that switched its output to the loudest input. [7] The next year, Emil Torick and Richard G. Allen were granted a patent for an "Automatic Gain Control System with Noise Variable Threshold", an adaptive threshold circuit invention with its patent assignation going to Columbia ...

  5. Ziegler–Nichols method - Wikipedia

    en.wikipedia.org/wiki/Ziegler–Nichols_method

    The "P" (proportional) gain, is then increased (from zero) until it reaches the ultimate gain, at which the output of the control loop has stable and consistent oscillations. K u {\displaystyle K_{u}} and the oscillation period T u {\displaystyle T_{u}} are then used to set the P, I, and D gains depending on the type of controller used and ...

  6. Radar signal characteristics - Wikipedia

    en.wikipedia.org/wiki/Radar_signal_characteristics

    Constant False Alarm Rate, a form of Automatic Gain Control (AGC), is a method that relies on clutter returns far outnumbering echoes from targets of interest. The receiver's gain is automatically adjusted to maintain a constant level of overall visible clutter.

  7. Log amplifier - Wikipedia

    en.wikipedia.org/wiki/Log_amplifier

    Automatic gain control of transmit power in radio frequency circuits; Scaling a large dynamic range sensor (e.g. from a photodiode [2]) into a linear voltage scale for an analog-to-digital converter with limited resolution [1] A log amplifier's elements can be rearranged to produce exponential output, the logarithm's inverse function.

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    mail.aol.com

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  9. EF86 - Wikipedia

    en.wikipedia.org/wiki/EF86

    The rarely used EF83 is a remote-cutoff pentode [4] otherwise similar to the EF86; the remote cutoff (variable mu) makes it suitable for applications such as automatic gain control (AGC) in tape recorders.