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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. Charge controller - Wikipedia

    en.wikipedia.org/wiki/Charge_controller

    A shunt charge controller or shunt regulator diverts excess electricity to an auxiliary or "shunt" load, such as an electric water heater, when batteries are full. [7] Simple charge controllers stop charging a battery when they exceed a set high voltage level, and re-enable charging when battery voltage drops back below that level.

  4. Charge pump - Wikipedia

    en.wikipedia.org/wiki/Charge_pump

    A charge pump is a kind of DC-to-DC converter that uses capacitors for energetic charge storage to raise or lower voltage. Charge-pump circuits are capable of high efficiencies, sometimes as high as 90–95%, while being electrically simple circuits.

  5. Phase detector - Wikipedia

    en.wikipedia.org/wiki/Phase_detector

    The delay line avoids a dead band. On the right is a charge pump with a filter at its output. A phase detector or phase comparator is a frequency mixer, analog multiplier or logic circuit that generates a signal which represents the difference in phase between two signal inputs. The phase detector is an essential element of the phase-locked ...

  6. TL431 - Wikipedia

    en.wikipedia.org/wiki/TL431

    Basic fixed-threshold comparator and its derivatives - simple time delay relay and cascaded window monitor. To ensure fast turn-off transients, load resistor RL should provide on-state current of at least 5 mA [39] The simplest TL431-based comparator circuit requires a single external resistor to limit I CA at around 5 mA. [39]

  7. Delay calculation - Wikipedia

    en.wikipedia.org/wiki/Delay_calculation

    Elmore delay [5] is a simple approximation, often used where speed of calculation is important but the delay through the wire itself cannot be ignored. It uses the R and C values of the wire segments in a simple calculation. The delay of each wire segment is the R of that segment times the downstream C. Then all delays are summed from the root.

  8. Delay-line oscillator - Wikipedia

    en.wikipedia.org/wiki/Delay-line_oscillator

    A delay-line oscillator is a form of electronic oscillator that uses a delay line as its principal timing element. The circuit is set to oscillate by inverting the output of the delay line and feeding that signal back to the input of the delay line with appropriate amplification. The simplest style of delay-line oscillator, when properly ...

  9. 555 timer IC - Wikipedia

    en.wikipedia.org/wiki/555_timer_IC

    The 555 timer IC is an integrated circuit used in a variety of timer, delay, pulse generation, and oscillator applications. It is one of the most popular timing ICs due to its flexibility and price. Derivatives provide two or four timing circuits in one package. [2]

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