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MARCH 2004 | |
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March 2004 - In This Issue [Cover Story] Module Merges 11.5-Gb/s NRZ/RZ Converter, Driver Long-haul optical communications systems rely on a variety of electrical and optical components to send and receive high-rate data. Among these components, data converters and modulators represent important functions that are also technically... — Paolo Tabacco [News] ADCs Clear Way To Digital Receivers Analog signals once dominated high-frequency designs, such as receivers. But with the growing availability of high-speed analog-to-digital converters (ADCs), with impressive capabilities in translating analog signals to the digital realm, an... — Jack Browne , et al. [News] Measurement Conference Tackles Differential Testing Accuracy measurements require both science and skill. Knowledge of measurement equipment helps in testing, but often years of experience are needed to hone reliable measurement techniques. Fortunately, a dedicated group in the US, the Automatic RF... — Jack Browne [Design Features] Steering Through RKE Requirements Remote-keyless-entry (RKE) capability has captivated automotive buyers, with an RKE installation rate of more than 80 percent for new vehicles in North America and more than 70 percent in Europe. Most RKE systems employ one-way (simplex)... — Tarlton Fleming , et al. [Design Features] Design Finite Impulse Response Digital Filters Interpolation, as was noted last month, is an effective means of achieving a desired filter response (such as an equiripple response) with a reduced number of multipliers. The approach was applied to the implementation of interpolation... — Ricardo A. Losada [Design Features] RCS Measurements Detect Power Lines Power lines can be hazardous to low-flying aircraft. Fortunately, it may be possible to use microwave and millimeter-wave radar systems to accurately detect power lines, and prevent accidents. Even under conditions of fog, rain, and snow, it should... — Dr. A. Kumar [Design Features] Build An E-pHEMT Low-Noise Amplifier Low-noise amplifiers (LNAs) for high-frequency applications have been based on GaAs metal-epitaxial-semiconductor field-effect-transistor (MESFET) and depletion-mode pseudomorphic-high-electron-mobility-transistor (pHEMT) technologies for some time.... — Ian Piper [Product Technology] CMOS Power Amp Drives Dual GSM Bands Amplifier specifiers involved with selecting products for GSM cellular-telephone designs have learned to choose from a substantial list of module solutions. These modules are accompanied by one or two amplifier chips and a power-control IC, and... — Jack Browne [Product Technology] Highpass Filters Cut Off 0.6 To 3.0 GHz Highpass filters are simple in function—passing signals without affecting them beyond a certain (cutoff) frequency and sharply attenuating signals below that frequency—but often difficult to realize in practice. By leveraging their... — Jack Browne [Editorial] Thanks To Those Who Came Wireless markets have yielded little excitement in recent years, due largely to the slowdown in cellular infrastructure sales and the "commoditization" of products for wireless-local-area-network (WLAN) systems. Still, the curious came this past... — Jack Browne |
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