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Semiconductors / Integrated Circuits

Calculation and Measurement of Lock Time in a Phase-locked Loop Frequency Synthesizer

Presentation of the equations involved in predicting lock time and transient response of synthesizer phase-locked loops
April 1, 2002
Technical Features Calculation and Measurement of Lock Time in a Phase-locked Loop Frequency Synthesizer Lock Time is an Important Design Parameter Florian Krug Technische Universitaet Muenchen Muenchen, Germany Jean Wilwert Infineon Technologies Muenchen, Germany The 'Wireless World' (radio and television broadcast, cordless phones, cellular radio communication, remote controls, wireless...
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A Distributed Amplifier for 40 Gbps Fiber-optic Communications Systems

Description of a distributed amplifier for a LiNbO<sub>3</sub> modulator driver using double-doped AlGaAs/AlGaAs pseudomorphic HEMTs
April 1, 2002
Technical Feature A Distributed Amplifier for 40 Gbps Fiber-optic Communications Systems H. Shigematsu, M. Sato, T. Hirose and Y. Watanabe Fujitsu Laboratories Ltd. Atsugi, Japan In recent years, the rapid development of multimedia communications has generated a strong demand for high speed and high capacity transmission systems. Wavelength-division multiplexing...
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Design of a Predistortive High Power Amplifier Using Carrier Complex Power Series Analysis

Introduction to a new carrier complex power series for linearizing the distortion effects of a high power amplifier
April 1, 2002
Technical Feature Design of a Predistortive High Power Amplifier Using Carrier Complex Power Series Analysis In this article, a new carrier complex power series for linearizing the distortion effects of a high power amplifier (HPA) is proposed. The amplitude (AM-to-AM) and phase (AM-to-PM) nonlinear characteristics of the HPA are...
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The Use of Intermodulation Tables for Mixer Simulations

Use of intermodulation table files to accurately predict the output frequency content of an up-converting or down-converting mixer in system simulations
April 1, 2002
Technical Feature The Use of Intermodulation Tables for Mixer Simulations The use of intermodulation table (IMT) files can lead to accurate prediction of the output frequency content of an up-converting or down-converting mixer in system simulations. For best results, custom IMT files should be constructed from mixer output spectrum...
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Output Power Improvement of a Push-push FET DRO by Using an Additional DR

Measurement of the output power level and phase noise property of nine conventional push-push dielectric resonator oscillators (DRO) incorporating an additional DR
April 1, 2002
Technical Note Output Power Improvement of a Push-push FET DRO by Using an Additional DR In this article, the output power level and phase noise properties of nine conventional push-push dielectric resonator oscillators (DRO) have been experimentally investigated while adding an identical dielectric resonator (DR) at the drain ports....
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A Portable Base Station Installation and Commissioning Test System

Introduction to a base transceiver station test system capable of providing adaptable on-site testing for the verification of transmit and receive paths of base stations
March 1, 2002
Product Feature A Portable Base Station Installation and Commissioning Test System Racal Instruments Limited Slough, UK Testing in the field puts singular rigorous demands on both the engineer and test equipment used, with the installation and commissioning of field installed base stations presenting particular challenges. Specific considerations include being...
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Software for Optimizing the Design and Low Cost Production of Waveguide Filters

Presentation of a newly released coupled-cavity filter software developed to allow optimized design of millimeter-wave waveguide bandpass filters
March 1, 2002
Product Feature Software for Optimizing the Design and Low Cost Production of Waveguide Filters Zeland Software Inc. Fremont, CA Because of their low loss and high power-handling capability, waveguide filters have been widely used in telecommunications and wireless communications systems. The key to gaining a competitive edge in the...
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A Complete Spectral System Analysis for RF/Microwave Engineers

A new spectral domain system simulator is featured
March 1, 2002
Cover Feature A Complete Spectral System Analysis for RF/Microwave Engineers Eagleware Corp. Norcross, GA Historically, RF and microwave system designers have been forced to resort to a hodgepodge of commercial and custom-written software to characterize and simulate the frequency-domain behavior of complex RF systems and subsystems. This approach tends...
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WCDMA Application of Gain Blocks

Description of the detailed operating characteristics of InGaP HBT gain block products that are widely used in 2G, 2.5G and 3G applications
March 1, 2002
Product Feature WCDMA Application of Gain Blocks EiC Corp. Fremont, CA This article deals with the detailed operating characteristics of InGaP HBT gain block products that are widely used in 2G, 2.5G and 3G applications, using 3G WCDMA as the example. The linearity, expressed by adjacent channel leakage ratio...
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A New Wideband Family of Oscillators

Introduction to a new line of voltage controlled oscillators designed to increase power and widen bandwidth by incorporating multiple tuned circuits
March 1, 2002
Product Feature A New Wideband Family of Oscillators Vari-L Co. Inc. Denver, CO Modern communication systems are designed to handle ever increasing amounts of data by utilizing more bandwidth and more sophisticated modulation schemes. Voltage controlled oscillators (VCO) are used in almost all radio and RF applications including cell...
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