PI filter - définition. Qu'est-ce que PI filter
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Qu'est-ce (qui) est PI filter - définition

ELECTRONIC CIRCUIT THAT REMOVES UNWANTED COMPONENTS FROM THE SIGNAL, OR ENHANCES WANTED ONES, OR BOTH
Electronic filters; Filter (circuits); Pi filter; Pi Filter; Frequency filter; BAW filter
  • A low-pass electronic filter realised by an [[RC circuit]]
  • Constant k filter response with 5 elements
  • center
  • High-pass T filter
  • Low-pass π filter
  • RL filter frequency response
  • Zobel network (constant R) filter, 5 sections

Electronic filter         
Electronic filters are a type of signal processing filter in the form of electrical circuits. This article covers those filters consisting of lumped electronic components, as opposed to distributed-element filters.
P.I.         
WIKIMEDIA DISAMBIGUATION PAGE
Π (disambiguation); Π; Pi (song); PIs; Pí; P.i.; Pi.; P I
Personal injury
Photographic filter         
  • The 80A filter, mainly used to correct for the excessive redness of [[tungsten]] lighting, can also be used to oversaturate scenes that already have blue. The photo on the left was shot with a polarizer, while the one on the right was shot with a polarizer and an 80A filter.
  • Effects of using a polarizer and a red filter in black-and-white photography
  • An extreme case: a Nikon D700 with a smashed filter which may have saved the Nikkor lens beneath. Usually, all that can reasonably be expected is protection from scratches, nicks and airborne contaminants.
  • Polarizing filter, Atlantic Ocean 1989
  • The ''LOMO effect'' imitates photos made with a low-cost Russian camera brand, named "LOMO". It is approximated by saturated central colors, blurred periphery, and darkened corners and edges ([[vignetting]]).}} effect.
CAMERA ACCESSORY CONSISTING OF AN OPTICAL FILTER
Daylight filter; Filter (photography); Lens filter; Filter ring; Filter mount; Filter thread; Cross screen filter; Photographic filters; Red Black and White filter; Camera filter; Series filter
In photography and cinematography, a filter is a camera accessory consisting of an optical filter that can be inserted into the optical path. The filter can be of a square or oblong shape and mounted in a holder accessory, or, more commonly, a glass or plastic disk in a metal or plastic ring frame, which can be screwed into the front of or clipped onto the camera lens.

Wikipédia

Electronic filter

Electronic filters are a type of signal processing filter in the form of electrical circuits. This article covers those filters consisting of lumped electronic components, as opposed to distributed-element filters. That is, using components and interconnections that, in analysis, can be considered to exist at a single point. These components can be in discrete packages or part of an integrated circuit.

Electronic filters remove unwanted frequency components from the applied signal, enhance wanted ones, or both. They can be:

  • passive or active
  • analog or digital
  • high-pass, low-pass, band-pass, band-stop (band-rejection; notch), or all-pass.
  • discrete-time (sampled) or continuous-time
  • linear or non-linear
  • infinite impulse response (IIR type) or finite impulse response (FIR type)

The most common types of electronic filters are linear filters, regardless of other aspects of their design. See the article on linear filters for details on their design and analysis.