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What is Filter?
In signal processing, a filter is a device or process that removes from a signal some unwanted component or feature. Filtering is a class of signal processing, the defining feature of filters being the complete or partial suppression of some aspect of the signal. Filters can be classified as analog or digital.
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2002-04-03 Zhongtian Optics fiber-optic filters receive T\V CERT nod
The fiber-optic filters of Zhongtian Optics Devices Co. Ltd have received a T\V Anlagentechnik GmbH certificate from the T\V CERT Organization, and has also passed DIN EN ISO 9001:2000 standards.
2007-05-04 Zero-IF DVB-T tuner gets rid of costly SAW filters
By using unique ZIF architecture and integrating an RF-tracking filter, Maxim's DVB-T tuner TV tuner eliminates external, discrete filtering components and the expensive SAW filter, thus enabling the industry's lowest BOM.
2005-02-23 Waysun ceramic filters operate to 2.8GHz
The new ceramic filters from Waysun Electronics operate within the 800MHz to 2.5Ghz frequency range and have a bandwidth of 6MHz to 200MHz.
2010-06-28 Video filters support SD, 1080i HD
Fairchild Semiconductor is rolling out three new video filtersFMS6143A, FMS6363A, and FMS6364to support various combinations of 1080i HD and standard definition (SD).
2006-08-31 Video filters enhance anti-aliasing, DAC smoothing
Maxim Integrated Products said its four new video filters have solved the issue of fine-tuning filter cut-offs in anti-aliasing and reconstruction filters.
2001-05-31 Using MMICAD to design lumped element filters
This application note shows how easy it is for users of MMICAD to synthesize a broad range of filter designs.
2001-03-30 Using Integrated Active Video Filters In Consumer Multimedia Systems
This paper discusses the advantages of the Fairchild Integrated Active Video Filter line in improving image quality in consumer multimedia systems.
2004-05-25 Using digital potentiometers to design low-pass adjustable filters
This app note presents a programmable, second-order, low-pass filter in four different scenarios.
2001-08-22 Use of MPE high-performance power line filters with isolation transformers
This application note discusses the relevance of using high-performance power line filters in isolation transformers.
2004-03-16 Updated process slashes size of CDMA RF filters
Agilent has reworked its proprietary film bulk-acoustic-resonator process technology to reduce the size of RF duplexer and filter devices for CDMA PCS phones.
2006-08-22 Tyco line filters feature reduced footprint
Tyco Electronics shrinks the footprint of its CORCOM SRB filter series by roughly 25 percent.
2006-02-23 Tyco introduces CORCOM WG EMI filters
Tyco's new EMI filter is designed for applications requiring a low-cost method of providing industry compliance for conducted EMI/RFI emissions.
2003-03-10 TWC01622 Loop Filters: Compatible Components
This application note provides information of the TWC01622's loop filters' critical parameters and compatible devices that meet these parameters.
2000-12-20 TV in cinema format: SAW filters drive PALplus
This application note discusses the suitability of SAW filters in addressing the PALplus specifications, the enhanced version of the PAL standard for wide-screen formats, for frequency response and group delay in the IF stages of TV receivers and video recorders.
2014-05-30 Tunable filters with N female connectors handle 50W power
The devices from Fairview Microwave include band pass and band reject models, which operate between 100MHz and 3GHz, and come in rugged aluminium casings.
2002-01-02 Toshiba RF SAW filters measure only 2-by-1.5-by-0.6mm
Claimed to be the industry's smallest RF SAW filters, the SRF942NLC61 and SRF1842NFC61 families come in CSPs that offer a 40 percent reduction in size and 60 percent reduction weight.
2004-09-20 Toko releases 'smallest' coaxial dielectric filters
Toko disclosed the availability of a new series of coaxial dielectric filters that is available in two models.
2001-05-22 TMS320C54x digital filters
This application note discusses digital filters that use both fixed and adaptive coefficients and Fast Fourier Transforms (FFTs).
2003-09-01 TKD RF filters suit digital TV receivers
The SMD type of SAW filter from Shenzhen Taikeda Electronic Co. Ltd features a 736MHz to 870MHz center frequency, and 3.5dB insertion loss.
2010-02-12 Tiny GPS module integrates LNA, SAW filters
The BGM781N11 GPS receive front-end module integrates one GPS LNA and two SAW filters with high ESD ruggedness in a tiny leadless TSNP11-2 package.
2001-08-22 The use of earth leakage circuit breakers with power line filters
This application note discusses the proper placement of earth leakage circuit breakers or residual current circuit devices on high-performance power line filters.
2005-06-08 The basics of anti-aliasing: Using switched-capacitor filters
This app note discusses the principles of anti-aliasing and its effect on system performance.
2005-03-29 The 'smallest SAW filters'
Murata disclosed that it has started mass production of what it claims as the world's smallest single band and dual band SAW filters.
2004-07-23 Technical Crystal ceramic filters operate to 10.76MHz
The new ceramic filters from Technical Crystal feature a center frequency of 10.64-, 10.67-, 10.7-, 10.73- or 10.76MHz, with a tolerance of 30kHz.
2002-10-02 Tai-Saw SAW filters suit cable modem designs
The company's TA0194 SAW filter devices measure 3.8-by-3.8-by-1.1mm and is designed for use in cable modem funtions.
2003-03-10 T7504 and T5504 Quad PCM Codecs with Filters
This application note discusses the digital and analog interfaces of the T7504 and T5504 PCM Codecs with filters.
2003-08-29 Switched Capacitor Interfacing Anti-Aliasing and Smoothing Filters
This application note discusses the need for anti-alising and smoothing filters for SCFs.
2002-11-14 Switched capacitor interfacing anti-aliasing and smoothing filters
This article address the need for anti-aliasing and smoothing filters for SCFs, the basics of sampling, the fundamentals of SCNs, and the design of anti-aliasing and smoothing filters for SCFs.
2003-05-26 Surge Suppression Technologies for AC Mains Compared (MOVs, SADs, Gas Tubes, Filters, and Transformers)
This application note discusses and compares the various types of surge suppression technologies available for protecting ac mains.
2003-08-29 SPM12kHz and 16kHz Blocking Filters
This application note presents SPM (subscriber pulse metering or tax metering) detection and methods to attenuate SPM burst signals.
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