Devices & ICs
 192 results found for Devices & ICs, displaying items 1 - 20

February 2010
Properly Packaging RF Semiconductors
Electronic packaging usually serves to protect what lies within. For RF and microwave devices, however, an ideal package must provide a physical barrier while appearing electrically invisible. And with the trend for increasing levels of integration at higher frequencies (see Wireless Demands Focus Designers On Integration), packages must often take on the electrical characteristics...  — Jack Browne

February 2010
Device Processes Differ In Benefits
Semiconductor processes have their differences. Some provide high power densities; some excel in integration of different functions. Understanding the differences is helpful not just to those choosing foundry services, but for anyone trying to understand the capabilities of different integrated circuits (ICs). More than three decades ago, a point of debate in RF/microwave semiconductors had to do with whether not only if a fledgling technology...  — Jack Browne

February 2010
Chip Helps Manage M2M Mobile Communications
GENEVA, SWITZERLAND—Smart-card integrated-circuit (IC) maker STMicroelectronics has developed a low-power processor chip dedicated to managing SIM data for machine-to-machine (M2M) cellular communications. Recent research is suggesting that this expanding market could account for over 200 million mobile connections by 2013. The ST32-M IC family combines the advantages of nonproprietary processor architecture and high-density, low-power,...  — Paul Whytock

November 2009
Scientists Demonstrate Wafer-Scale Graphene-On-Silicon Technology
MALIBU, CA HRL scientists have fabricated and demonstrated graphene- on-silicon field-effect transistors (FETs) at full wafer scale. This work is part of the Carbon Electronics for RF Applications (CERA) program, which is sponsored by the Defense Advanced Research Projects Agency (DARPA) and under the management of the Space and Naval Warfare Systems Center. CERA’s goal is to exploit the unique physical characteristics of graphene to create electronic...  — Dawn Hightower

November 2009
MMICs Serve MM-Wave Systems
Microwave and millimeter- wave radios require a number of functions, including amplifiers, filters, and attenuators. To fuel those radio designs, Endwave Corp. has developed a line of monolithic-microwave-integrated- circuit (MMIC) components covering 7 to 38 GHz as well as 71 to 86 GHz. Based on the firm’s extensive design library, these MMIC components are available for a variety of functions, ...  — Jack Browne

October 2009
Data Converters Process RF/MW Signals
Product life cycles can be short, particularly with certain semiconductors. As any computer owner knows, for example, memory chips continue to grow in density and drop in cost, quickly rendering older memory devices obsolete. Short product life cycles pose daunting challenges for system designers, especially for commercial and military systems that rely on the availability of some devices for a decade or longer. Fortunately, Lansdale Semiconductor...  — Jack Browne

October 2009
Multimode Transceiver Eliminates SAW Filters
Wireless device designers seek increased functionality but without added size, especially when supporting handset designs with multimode, multiple-band capabilities. Fujitsu Microelectronics America has responded to the needs of these designers with the functionpacked model MB86L01A multimode third-generation (3G) cellular radio transceiver, which is fabricated without 3G transmit and receive interstage surface-acoustic-wave (SAW) filters and ...  — Jack Browne

October 2009
Some Older ICs Don’t Fade Away
Product life cycles can be short, particularly with certain semiconductors. As any computer owner knows, for example, memory chips continue to grow in density and drop in cost, quickly rendering older memory devices obsolete. Short product life cycles pose daunting challenges for system designers, especially for commercial and military systems that rely on the availability of some devices for a decade or longer. Fortunately, ...  — Jack Browne

October 2009
Digital RF Processor Serves Plethora Of Cellular Systems
Digital RF processors (DRFs) offer the potential of meeting the requirements for a wide range of cellular telephone wireless standards without significant changes in design and hardware. A DRP design is detailed here, with digital receive and transmit sections, although one of the key components within the DRF is the frequency synthesizer, which employs a novel approach to phaselock- loop (PLL) implementation. Newer cellular telephones are...  — Louis Fan Fei , et al.

October 2009
50-V LDMOS Transistors Target TV Broadcast Transmitters
TO SERVE TV TRANSMITTERS employing both analog and digital modulation formats, the MRF6V3090N RF power LDMOS transistor delivers 90 W peak output power at 1-dB compression with greater than 40 percent efficiency through the ultra-high-frequency (UHF) band. As a linear driver, the MRF6V3090N achieves 21 dB power gain and 12 percent drain efficiency with an average output power of 4.5 W based on a DVB-T OFDM signal. The transistor offers an adjacentchannel power...  — Nancy Friedrich

October 2009
RF Interface Front End Operates To 100 MHz 800 To 2400 MHz
TO MEET THE NEEDS OF APPLICATIONS like remote medical reading and pet identification, a new integrated circuit (IC) spans 50 Hz to 100 MHz. The RF interface front end offers a maximum receive data rate of 120 kb/s and a maximum transmit data rate of 5 kb/s. The IC operates from 2.4 to 4 V with a maximum 1.0 µA supply current. Its output current is typically 50 µA. The front end requires 36 µW minimum input power with a maximum of 300 µW. For low-power processors under 50...  — Nancy Friedrich

October 2009
GPS Chip Offers –160-dBm Tracking Sensitivity
TO SATISFY GLOBAL POSITIONING SYSTEM (GPS) solutions’ demand for higher sensitivity, long battery life, and instant location capture, the u-blox 6 CMOS chip vows to enable significantly extended battery life. By extending the last chip generation’s acquisition engine to over 2 million correlators with acquisition under 1 s, this chip exhibits stronger acquisition capability of weak signals and a shorter time to first fix. It boasts –147 dBm acquisition sensitivity...  — Nancy Friedrich

September 2009
Integrated Devices Arm Infrastructure Radios
Integration has been critical to RF electronics in mobile handsets, although elusive to achieve in infrastructure equipment. The classic tradeoff in achieving integration has been the choice between using discrete components, with their superior performance, or integrated circuits (ICs), with their small size. Recently, Analog Devices has developed a series of highly integrated phase-lock-loop (PLL) circuits that also...  — Ed Balboni , et al.

September 2009
Modify MOSFET Models For Nonlinear Quantification
Scaling silicon CMOS transistors to smaller and smaller dimensions has made them serious competitors to traditional high-frequency transistors in many RF and microwave applications.1 Of course, creating accurate models of these shrinking devices is an important part of modern computer-aided-engineering (CAE) design practices, and linearity is a key issue in these models especially for RF/microwave circuits, not only in high-power...  — Muhammad Taher Abuelma’atti , et al.

August 2009
Sources Shave Phase NoiseFor Millimeter-Wave Applications
Phase noise limits the performance of many high-frequency systems from electronic-warfare (EW) to test equipment. But new low-noise transistors are making possible a score of higherfrequency oscillators and synthesizers with outstanding spectral purity to meet the performance requirements of existing and emerging systems. At Micro Lambda Wireless, for instance, designers are replacing...  — Ashok Bindra

August 2009
MMIC Limits Noise Figure To 3 dB At 4 GHz
WITH LOW INTERMODULATION distortion from 50 MHz to 6 GHz, the PHA-1+ monolithic microwave integrated circuit (MMIC) may be used as a replacement amplifier in high-dynamic-range systems like linearized transmitters and receivers. Usually, this device provides an output third-order intercept point of +42 dBm while maintaining a noise figure below 3 dB to 4 GHz. It offers typical gain of 14 dB at 2 GHz. Overall performance is comparable to the firm’s previously...  — Nancy Friedrich

August 2009
ASIC Processes UWB Baseband Signals
IMPULSE-RADIO ULTRA WIDEBAND (IR-UWB) targets low data rates in the range of 0.1 to 10.0 Mb/s. Recently, an application-specific integrated circuit (ASIC) for IR-UWB baseband signals was realized and characterized by David Barras, George von Bueren, and Heinz Jaeckel from the Swiss Federal Institute of Technology together with Robert Meyer-Piening from Sensirion AG and Walter Hirt from the IBM Zurich Research Laboratory. This baseband ASIC, which is...  — Nancy Friedrich

May 2009
Modulator Combines Four Devices To Cover 950 To 1575 MHz
TYPICALLY, BROADBAND-SATELLITE-COMMUNICATION designs required a variety of RF integrated circuits (ICs) to form an intermediate-frequency (IF) signal path. In contrast, the ADRF6750 modulator integrates an analog in-phase/ quadrature (I/Q) modulator, fractional-N phase-locked-loop (PLL) synthesizer, voltage-controlled oscillator (VCO), and digitally controlled RF attenuator in an 8-x-8-mm LFCSP package. Covering 950 to 1575 MHz with a single 5-V power supply, the ADRF6750...  — Nancy Friedrich

May 2009
Receiver Module Supports Data Links To 64 kb/s
WHEN USED IN CONJUNCTION with the matching TX3B-869-64 transmitters, the RX3G ultra-high-frequency (UHF) radio data-receiver device facilitates the implementation of wireless infrastructure that can support speeds of 64 kb/s and transmission ranges to 75 m within buildings or 300 m over open ground. The RX3G is a phaselocked- loop (PLL) synthesizer-based, miniature printed-circuit-board (PCB) -mounted radio data-receiver device. It exhibits receive...  — Nancy Friedrich

May 2009
Agile Sources Reach 50 GHz
MMillimeter-wave test signals are essential for evaluating a wide range of systems and their components, including aerospace, defense, and satellite communications systems. Those test signals should feature low phase noise, minimal harmonics and spurious content and, ideally, fast switching speed to cut the time needed for production testing of components. To fill those requirements, Giga-tronics (www.gigatronics.com) has introduced a new line of six frequency-agile synthesized...  — Jack Browne





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