Industry News

Ultra-Low Noise VCOs

VCOs featuring several performance enhancements ever existing VCO technology that improve exisitng phase-locked loop circuits significantly
Ultra-low Noise VCOs Z-Communications Inc. San Diego, CA Currently, there is a demand for lower noise performance and lower cost VCOs, especially in the upcoming personal communications service and digital radio markets. In these applications, both the Colpitts configuration, shown in Figure 1 , and the common-base configuration, shown...
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A Surface-mount OCXO for Wireless Applications

A surface-mount oven-controlled crystal oscillator (OCXO) capable of covering a wide range of performance using precision AT- and SC-cut srystals
A Surface-mount OCXO for Wireless Applications Reeves-Hoffman Inc. Carlisle, PA The growth of today's electronic communications market is based on increased technological capabilities and making those technologies cost effective. Those same principles led to the development of the surface-mount, oven-controlled crystal oscillator (SMOCXO). The personal communications service (PCS) and...
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A High Speed Radio Communications Analyzer

This month's cover features a radio communications analyzer that is capable of performing the same functions as a full rack of test equipment with greater speed
A High Speed Radio Communications Analyzer Anritsu Wiltron Co. Morgan Hill, CA Speed and flexibility are increasingly crucial requirements of test instruments used by cellular handset manufacturers. The ability to test thousands of handsets -- based on multiple standards -- in as little as an hour is now the...
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A Digital Radio LNA

A low noise amplifier (LNA) designed for a cellular-band repeater system that combines low noise, high linearity and robustness.
A Digital Radio LNA Salisbury Engineering Inc. Salisbury, MD The digital radio systems being deployed currently promise increases in spectrum efficiency as well as voice quality. In order to realize this performance outside the laboratory environment, the RF front ends must be more sensitive, linear and robust than their...
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Phase-locked Sources for LMDS and MVDS Applications

Phase-locked loop oscillators that use doubler schemes to achieve the output frequencies required by wireless local multipoint distribution systems (LMDS) and multipoint video distribution systems (MVDS)
Phase-locked Sources for LMDS and MVDS Applications Micro Lambda Inc. Fremont, CA Currently, 28 and 42 GHz mm-wave systems are being offered for wireless local multipoint distribution systems (LMDS) and multipoint video distribution systems (MVDS). Systems operating at 31 GHz have also been proposed for these applications. These systems...
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Database Sampling: A Real-World Solution to MMIC Yield Sensitivity Analysis

The addition to a new database sampling technique to the MMICAD linear simulator for modeling MMIC yields accurately
Database Sampling: A Real-world Solution to MMIC Yield Sensitivity Analysis Randall North and David Kennedy Optotek Ltd. Kanata, Ontario, Canada Mike Murphy M/A-COM, Microelectronics Division Lowell, MA In the course of a typical MMIC development and manufacturing program, there are a number of common issues that affect design success...
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A Direct 64-QAM Modulator Suitable for MMIC Implementation

A 64-quadrature amplitude modulation (QAM) modulator that achieves greater than 25 percent operating bandwidth while maintaining vector errors at less than 10 percent
A Direct 64-QAM Modulator Suitable for MMIC Implementation Surinder Kumar, Abbas Mohammadi and David Klymyshyn Telecommunications Research Labs (TRLabs) and University of Saskatchewan Saskatoon, Saskatchewan, Canada There is considerable worldwide interest in personal communications services (PCS) with wireless data communication. Spectrum allocation for such services has been made and...
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Design and Characterization of a Multipurpose PCS Class A Amplifier/April 97

A multistage PCS class A amplifier design that applies GaAs surface-mount MMICs as preamplifiers and silicon bipolar power transistors in power stages
Design and Characterization of a Multipurpose PCS Class A Amplifier E. James Crescenzi, Jr. and Walter A. Strifler Watkins-Johnson Co., Microwave Products Group Palo Alto, CA The rapid expansion of personal communications service (PCS) base stations and services has resulted in an increased demand for linear power amplifiers in...
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Around the Circuit

Around the Circuit Industry News Commercial and defense electronic supplier Raytheon Co. has entered into a definitive agreement to merge with Hughes Aircraft, Hughes Electronics Corp. 's defense operations. The consolidated company will be known as Raytheon Co. and will have headquarters based in Raytheon's Lexington, MA facility. The...
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New Literature

New Literature Chip Attenuator Catalog This catalog provides information on chip attenuator application, as well as the company's capabilities, including photolithography, etching, dicing/sawing, plating, assembly, and consulting and design. Specifications are listed. Performance graphs are provided. DAV Technology, Tyngsborough, MA (508) 649-4231. Structural Adhesive Selector Guide This selector guide...
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