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  2. Power-line flicker - Wikipedia

    en.wikipedia.org/wiki/Power-line_flicker

    The requirements of a flicker measurement equipment are defined in the international electro-technical standard IEC 61000-4-15. [2]A flickermeter is composed of several function blocks which simulate a 230 V/60 W or a 120 V/60 W incandescent lamp (reference lamp) and the human perception system (eye-brain model).

  3. Flicker noise - Wikipedia

    en.wikipedia.org/wiki/Flicker_noise

    Flicker noise is a type of electronic noise with a 1/f power spectral density. It is therefore often referred to as 1/ f noise or pink noise , though these terms have wider definitions. It occurs in almost all electronic devices and can show up with a variety of other effects, such as impurities in a conductive channel, generation and ...

  4. Flicker (light) - Wikipedia

    en.wikipedia.org/wiki/Flicker_(light)

    In visual perception, flicker is a human-visible change in luminance of an illuminated surface or light source which can be due to fluctuations of the light source itself, or due to external causes such as due to rapid fluctuations in the voltage of the power supply (power-line flicker) or incompatibility with an external dimmer.

  5. Noise reduction - Wikipedia

    en.wikipedia.org/wiki/Noise_reduction

    Noise reduction is the process of removing noise from a signal. Noise reduction techniques exist for audio and images. Noise reduction algorithms may distort the signal to some degree. Noise rejection is the ability of a circuit to isolate an undesired signal component from the desired signal component, as with common-mode rejection ratio.

  6. Leeson's equation - Wikipedia

    en.wikipedia.org/wiki/Leeson's_equation

    In the above equation, if f c is set to zero the equation represents a linear analysis of a feedback oscillator in the general case (and flicker noise is not included), it is for this that Leeson is most recognised, showing a −20 dB/decade of offset frequency slope. If used correctly, the Leeson equation gives a useful prediction of ...

  7. Phase noise - Wikipedia

    en.wikipedia.org/wiki/Phase_noise

    Pink noise is sometimes called Flicker noise, or simply 1/f noise. The integral linewidth takes Voigt lineshape, a convolution of the white noise-induced Lorentzian lineshape and the pink noise-induced Gaussian lineshape. Pink noise provides a Allan Deviation plot at moderate averaging times. This flat line on the Allan Deviation plot is also ...

  8. The 25 best last-minute gifts that will still arrive by Christmas

    www.aol.com/lifestyle/last-minute-christmas...

    Still shopping for Christmas gifts? Don't sweat it — we've rounded up 25 incredible options that will ship by December 25.

  9. Power conditioner - Wikipedia

    en.wikipedia.org/wiki/Power_conditioner

    An AC power conditioner is the typical power conditioner that provides "clean" AC power to sensitive electrical equipment. Usually this is used for home or office applications and commonly provides surge protection as well as noise filtering.