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What’s New Saving space in wireless transceivers


MaximIntegrated Products introduces the MAX2063, a programmable,multistate, dual-channel, digital IF/RF variable-gain amplifier (VGA). The device provides 'rapid- fire' gain selection for four customised attenuation states per path, 25ns digital switching and low digital VGA amplitude overshoot/undershoot. Thismakes it an ideal choice for automatic gain control (AGC) circuits in 2.5G, 3G, 4G wireless infrastructure transceivers, including GSM/EDGE, CDMA,WCDMA, LTE, and WiMAX applications.


TheMAX2063 can serve as either an IF


or RF all-purpose VGA, interfacing directly with 50 Ohm systems operating over the 50 to 1000MHz frequency range. Since the stages within each path have their own RF input and RF output, the device can optimise either noise figure or linearity. Its performance is said to ease filtering requirements for close-in harmonics, leading to simpler and more cost-effective filter designs.


www.maxim-ic.com Cut your losses


Crystek’s new 190 Series CCK26.5 and CCSMA26.5 low loss RF coaxial cables operate up to 26.5GHz and offer a 1.1m minimum bend radius. They are available from stock with 2.92mm (K) and high frequency SMA connectors, featuring stainless-steel solder-clamp construction and strain reliefs.


Portable converter offers input options


Gresham Power Electronics has introduced a portable 90Wconverter that can be powered from different sources. It suits mobile devices in industrial, IT, communications, scientific and medical applications. The switch mode power supply has a universal AC input ranging from 90 to 264 VAC and can also be powered from a 12 VDC source.


Gresham Power’s managing director, JakeMoir, said: “The introduction of this


new multi-input adapter is a response to customer requests for a flexible power solution to run electronic equipment no matter where they are: car, train, aeroplane, office or home.”


The first model (DS01436) meets a variety of medical safety standards


including: fluctuations and flicker; electrostatic discharge; radiated susceptibility; EFT/bursts; surges; conducted immunity; magnetic field immunity; voltage dips; emissions and susceptibility and immunity to conducted transients on power leads. It has been safety approved to EN 60601, EN 60950-1 and EN60950 safety standards and includes the CE mark (LVD).


The product provides a single 19V output rated at 5A. It is housed in a


plastic enclosure and includes a commercial aircraft DC power input cable and conventional automotive 12V socket power input cable. The power supply has a low profile, is double-insulated (no ground required) and is RoHS and WEEE compliant.


www.greshampower.com November 2010 | 35 The cables provide: attenuation of


0.50dB/ft at 26.5GHz; shielding effectiveness greater than -90dB; and an operating temperature range of -55 to 85°C (extended range available to order).


www.crystek.com Choking noise


Murata’s new DLP11TB series 0504 chip common mode choke coils are designed to reduce undesirable radiation noise in electronic equipment. The company has boosted the cut-off frequency to 8GHz or more, enabling transmission of USB3.0 SuperSpeed signals.


USB 3.0 has added SuperSpeed mode for data


transmission up to 5Gbps, representing a 10-fold increase over the previous standard.With the increased data transmission speed, signal frequencies have also increased making it difficult to deal with noise while maintaining signal quality using ordinary common mode choke coils.


The DLP11TB series' 1.25 by 1mm dimensions suit


mobile devices. Features include a common mode impedance of 80ohms at 100MHz and the coils match the characteristic impedance of 90ohms from the USB 3.0 standard.


www.murata.eu


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