Semiconductors / Integrated Circuits

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Technical Feature Implementation of a Neural Network HEMT Model into ADS Neural network algorithms have been applied to various areas of engineering and computer science. A high electron-mobility transistor (HEMT) large-signal model has been implemented in the Advanced Design System (ADS) software package using a multilayered neural network. The...

Technical Feature A Broadband Planar Isolator Using Coupled Microstrip Lines on a Magnetized Gyrotropic Substrate A new type of broadband isolator, using coupled microstrip lines on a transversely magnetized gyrotropic substrate, is proposed in this article. The nonreciprocal coupling between two microstrip lines can be used to create an...

Technical Feature Aluminum Nitride vs. Beryllium Oxide for High Power Resistor Products Michael Kettner, Patrick Biebersmith, Nelson Roldan And Balram K. Sharma Florida RF Labs Inc. Stuart, FL For the past few decades, beryllium oxide (BeO) has been the main substrate material used for RF resistors and terminations for...

Technical Feature Planar EM Simulation of Multi-chip Modules and BGA Packages Jim DeLap Agilent EEsof EDA Westlake Village, CA As electronics vendors and consumers demand smaller and lower cost products, manufacturers must find ways to increase levels of integration while maintaining product functionality. These higher levels of integration are...

Technical Feature An Embedded MOS Model 9 for CMOS RF Circuit Design This article presents an n-channel MOS transistor model for the simulation of CMOS RF circuits in the gigahertz range. This model is based on a MOS model 9 (MM9) compact transistor model, embedded in a network describing...

Technical Feature Rigorous Analytical Expressions for Electromagnetic Parameters of Transmission Lines: Coupled Sliced Coaxial Cable This article is a continuation of a previous article that appeared in Microwave Journal and is the first part in the development of accurate closed-form formulas for the primary parameters (inductance [L] and capacitance...

Special Report Circuit Designers: An Endangered Species? Ernest Rejman, Contributing Editor Back in the Jurassic Period, when the four-function calculator first made its appearance, some greeted it with dismay. "Suitable for imbeciles," spat an elder engineer of my acquaintance. "Now it won't be necessary to even know how to...

Technical Note Coping with Hidden Spurious Harmonic Modes in the Design of Low Pass Corrugated Waveguide Filters Hidden spurious harmonic modes in corrugated waveguide filters are investigated from both theoretical and practical points of view. It has been found that multiple mode couplings occurring at more than one place...

Application Note Application and Operation of a Double OCXO Timo Reinhardt FOQ Piezo Technik GmbH Bad Rappenau, Germany Central switching centers make up the junction of mobile and stationary communications. In order to handle increasing data flows, this operation is performed at ever-higher frequencies and data speeds, and the...

Technical Feature An Automatic Macro Program for Radio Frequency MOSFET Characteristics Analysis The parameter extraction language (PEL) in Agilent IC-CAP software is used to develop an automatic macro program for the analysis of the characteristics of RF MOSFETs. By using this powerful macro program, the time spent on the...