SAW filter
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SAW filter

(Surface Acoustic Wave filter) A semiconductor device that is used to filter out desired frequencies. Widely used in mobile phones to filter both RF and IF frequencies, a SAW filter uses the piezoelectric effect to turn the input signal into vibrations that are turned back into electrical signals in the desired frequency range.

Two sets of metal electrodes like teeth on a comb are adhered to a quartz crystal and spaced apart (in microns) based on the required frequencies. As few as five and as many as 5,000 electrodes are used. An intriguing analogy from Bruce Thomas at Sawtek, a subsidiary of TriQuint Semiconductor, is that the first set of electrodes is like throwing a large log in to a pond, which makes huge waves that cause little sticks to bounce out at the other side (second set).

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The answer was a $40,000 electronic filter that cleanses the grease and smoke as the kitchen vents carry air out the side of the building.

A hard sell: retailers still skeptical of downtown's viability by Fixmer, Andy / Los Angeles Business Journal

These include numerous Faucet Mounts with the electronic filter life indicators, PUR(R) Dispenser and Pitchers, the new, award-winning designed Delta Simply PUR(R) faucet with built-in PUR(R) filtration technology, and Kenmore and Whirlpool refrigerators which dispense PUR(R) filtered drinking water and ice.

PUR Launches First Ever 3-Stage Water Filter - Leads the Way with ... by Business Wire

Both the kitchen and bathroom filter units include electronic filter status lights that tell users when the filter is working and when it needs replacement.

Clear Flow Filters Through the Competition with Innovative Kitchen ... by Business Wire

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SAW filter (redirected from Electronic filter)

SAW filter

SAW filter
(redirected from Electronic filter)