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).
References in periodicals archive ?
Utilising their electronic filter element cross-reference database, the Hi-line internal sales team can quickly identify a competitively priced filter element replacement.
The weighing system has a self-regulating electronic filter that compensates for vibration.
An electronic filter indicator lets the user know when to replace the filter.
Second principle of mechanical signal decomposition is based on electronic filter banks.
The TI-2100 Interference Suppression Unit is the first in a series of adaptive electronic filter products to use ERI's EMC3 proprietary technology, which automatically detects and eliminates on-channel interference and jamming on satellite downlink signals.
MtronPTI is a leading designer and manufacturer of advanced, highly engineered frequency control and electronic filter products.
3 Micron Paricle , Prefilter: High Efficiency Prefilter, Illumination: Fluorescent Lamp 40W, Sterilizing: Uv Germicidal Tube , Front Door: Transparent Acrylic Sheet, Utility Provide: Gas/Air Cock And Multipoint 15/5 Amp Electric Socket, Supply Voltage And Frequency: Ac 230 V-50/60 Hz, Moc Cabinet : Wooden Thick Door Board Duly Sunmicaclad, Work Table: Stainless Steel Is-304 , Slide Panels: Thick Plexi Glass Duly Framed, Magnehelic Gauge: To Track Filter Pressure, Electronic Filter Choke Alarm: For Different Pressure Monitor, Controller: Microprocessor Based Pid Controller With Lcd Display, Standard: Bs 5295, One Year Warranty For The Instrument.
Along with existing PUR faucet mounts, the Stainless Steel Style Faucet Mount features an electronic filter life indicator and one-click installation along with a 360-degree swivel that fits most kitchen faucets.
It is equipped with a charcoal water filter that removes up to 83 percent of chlorine and electronic filter indicator.
82) will provide great tasting water and comes with an electronic filter life indicator that makes it easier to know when a filter needs to be replaced.
The two larger models have an ionizer to freshen the air, three-speed fans with quiet nighttime settings, 360-degree airflow, and an electronic filter monitor.
The unit features electronic controls and an electronic filter monitor, along with modern styling.
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