Hong Kong Will Release More SpectrumOfta, the telecom regulator for Hong Kong, has announced plans to sell off more radio spectrum to wireless telecom providers. Ofta will auction separate lots of 4.8 Hz in the 1800-MHz band. For the purposes of the sale, the spectrum will be divided into six blocks. Winning bidders will have the right to use the airwaves until 2021 when many … [Read more...]
TI unveils lowest power zero-drift instrumentation amplifier for portable, precision applications
Providing an unmatched combination of precision, low power and low supply voltage, Texas Instruments Incorporated introduced the industry's lowest power zero-drift instrumentation amplifier. The device features the lowest quiescent current and lowest input bias current versus the nearest competition, as well as an impressive power-to-noise ratio, very low offset voltage/drift … [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...]
Extended Aluminum Capacitor Line Provides Z as Low as 60 mΩ
A new CRZ device from Vishay Intertechnology is the latest edition to the 150 CRZ series of surface mount aluminum capacitors. The 150 CRZ devices are now available in five case sizes, ranging from 8 mm x 8 mm x 10 mm to the larger 12.5 mm x 12.5 mm x 16 mm. The capacitors offer impedance as low as 60 mΩ at 100 kHz, a high rated ripple current of 1007 mA at +150 degrees C. and … [Read more...]
Wireless Telecom: Online Information for FCC Limits Calculations and Important Web Links
http://www.atcb.com/tools.asp … [Read more...]
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...]
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...]
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