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Interference Technology

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Next Round in White Space Interference Controversy: FCC Testing

 

The Federal Communications Commission’s Office of Engineering and Technology (OET) has announced that as of July 14, 2008,it will begin field testing the performance of prototype White Space devices designed to operate in vacant spectrum between those bands used by digital television broadcasters. These tests are part of the FCC process of rulemaking and will help determine … [Read more...]

Impinj Acquires Intel’s UHF RFID Reader Chip Operation

 

RFID Solutions Provider Impinj has acquired the UHF RFID chip operation of Intel Corporation. Chip maker Intel had developed the awarding-winning R1000 RFID reader chip. The acquisition of Intel’s RFID unit enhances the range of Impinj’s RFID offerings. It is especially noteworthy that the single R1000 chip enables 90 percent of the components required all reader form … [Read more...]

Rebanding to Protect Public Service Radio from Interference Stalled Again

 

The Federal Communications Commission (FCC) has issued an Order granting additional waivers to public safety licensees to move their broadcasts to different frequencies and thus eliminate the interference that has plagued First Responder radio signals. The original deadline had been June 26, 2008, but some waivers were granted on June 17. In this Order, those agencies that … [Read more...]

FCC Gets Complaint about Wireless Microphones

 

The Associated Press reports that consumer groups are accusing Broadway actors, mega-church pastors, karaoke DJs and others who use popular wireless microphones of unwittingly violating Federal Communications Commission rules that require government licenses for such devices. In a complaint filed Wednesday, the groups accused manufacturers of deceptive advertising in the way … [Read more...]

Instrumentation Amplifier Includes Filters to Reduce RF Interference

 

The new INA333 is a is a zero-drift instrumentation amplifier from Texas Instruments with input bias current of 200 pA and quiescent current of 75 µA. Offset voltage is 25 µV, and offset drift is 0.1 µV/°C. The INA333 yields an input voltage noise of 50 nV/rt-Hz with a proprietary switched capacitor notch filter. The MSOP-8-packaged amplifier has 3 op-amp architecture and … [Read more...]

Long Term Exposure to ELF EM Fields Impairs Spatial Recognition Memory in Mice

 

A study reported in the current issue of a prominent medical publication indicates that mice that were subjected to prolonged exposure to extremely low-frequency (ELF) electromagnetic fields displayed significantly impaired spatial recognition memory. Researchers exposed the mice to 25 or 50 Hz of electromagnetic fields for either 7 or 25 days and then tested them in a Y maze. … [Read more...]

RF Technology Firm Aeroflex Buys Swedish Processor Company

 

Colorado-based Aeroflex, Inc. has announced the purchase of privately held Gaisler Research AB of Gothenburg, Sweden.  Aeroflex supplies RF and broadband technology to the aerospace, defense, and communications industries. Gaisler has developed a range of SPARC-compliant synthesizable processors that are available under free licensing terms. Known as Leon, the processor … [Read more...]

Lightweight Shielding Plastic Targets Aerospace Applications

 

PREMIER™ PEI-140 from Chomerics is a lightweight, electrically-conductive plastic for EMI shielding of high temperature electronics. This plastic maintains high temperature tolerance, chemical resistance, and UL 94V-0 flammability rating for a cost effective electronics solution up to 85 dB in aerospace applications. PEI-140 complies with avionics smoke density requirements in … [Read more...]

Stacked Capacitor Series Meets Military Performance Specifications

 

A line of military grade stacked capacitors from KEMET Corporation have been crafted for use in high-frequency power supplies. Commonly referred to as switch mode power supplies (SMPS) stacked capacitors, these products are qualified to military performance specification MIL-PRF-49470 and DSCC Drawing 87106. When used in high-reliability SMPS and pulse energy applications, the … [Read more...]

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