SAW filter

(redirected from Electronic filter)
Also found in: Wikipedia.

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 into a pond, which makes huge waves that cause little sticks to bounce out at the other side (second set).

TC-SAW and BAW
SAW filters are sensitive to high temperatures, and temperature-compensated SAW (TC-SAW) filters were designed to retain their integrity under such conditions. However, TC-SAWs do not support the higher LTE frequencies, but bulk acoustic wave (BAW) filters do. As a result, SAW filters are often used for lower frequencies, while BAWs, which are twice as costly, are used for the high end. See RF filter.
Mentioned in ?
References in periodicals archive ?
This report presents the worldwide Low-pass Electronic Filter market size (value, production and consumption), splits the breakdown (data status 2014-2019 and forecast to 2025), by manufacturers, region, type and application.
Too bad you are not still using your electronic filter. The fact that it clogged frequently is telling you that it is very effective.
A radio frequency filter, or an RF filter, is an electronic filter that is widely used in radios, televisions, and wireless communication devices; and are designed to operate on signals ranging from medium to high frequencies.
Electric Sockety, Supply Voltage And Frequency Ac-230 V.50/60Hz Moc Cabinet : Wooden Thick Door Board Duly Sunmica Clad, Work Tablew: Stainless Steel Is:3040 Slide Panel: Thick Plexi Glass Duly Framed, Magnetic Gauge: To Trck Filter Pressure, Electronic Filter Choke Alarm For Diffrent Pressure Moniter, Controller: Micro Processor Based Pid Controller With Lcd Display, Standard: Bs: 5295 One Year Warranty For Instrument.
A new electronic filter clogging indicator from power management company Eaton is enabling users to minimise machinery downtime and improve their operational processes.
Daniels, Approximation Methods for Electronic Filter Design: With Applications to Passive, Active and Digital Networks.
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 design, construction, and specifications of the electronic filter are discussed.

Full browser ?