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 60 GHz Transceiver IC Design Using High-Mobility .15-micron GaAs Process
This document describes new technologies that enable reliable MMIC design at millimeter-wave frequencies. It is shown that successful millimeter-wave MMIC design requires:
- A reliable millimeter-wave integrated circuit process,
- A millimeter-wave qualified design kit based on rigorous device modeling and validation, and
- Advanced frequency-domain simulation that can handle highly nonlinear and dense integrated circuits.
The 60 GHz frequency is the primary challenge driving the technologies in this work; however, readers will understand that additional precision, capacity, and reliability are key enablers at any frequency, hence the design methods described here can be utilized for added fidelity and design success in microwave applications.
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 Electric Drive Design - Siemens
Electric drives are found in all areas of transportation and industrial automation and cover power ranges from fractional to thousands of horsepower and beyond. Design of components of electric drives systems or the even more challenging task of designing sub-systems or systems belonging to the electric drive applications area is of great interest to many electrical engineers. The main reason for this interest is the current trend for electromechanical energy converters to replace traditional hydraulic systems and, more generally, mechanical systems. This trend will continue and even accelerate due to significant benefits of weight and cost reduction, increased reliability of electrical systems, and convenient control and automation via electric and electronic means.
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 Gigabit Backplane SI Design Kit and White Paper
The Gigabit Backplane Signal Integrity Design Kit is based on the Xilinx MK322 Evaluation Board for the Xilinx Virtex-II™ Pro X FPGA. This virtual design kit provides Ansoft parameterized circuit, planar electromagnetic (EM), and 3D EM models, which can be used to correlate simulation with measured results. The real power of this kit, however, is the ability to perform extremely accurate what-if analysis, in both the time and frequency domain, for a variety of layout and design modifications.
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 High-Speed Interconnect White Paper
Intel and Ansoft have teamed to define a Reference Flow for High-speed Serial Interconnect. This joint effort leverages Intel’s expertise in designing and developing high-speed serial interconnect technology and standards, and combines that expertise with advanced circuit simulation and electromagnetic extraction tools from Ansoft. This document describes the methods used to reliably characterize and design complex serial channels. Circuits and interconnect examples from PCI Express channel design will we used as a vehicle to demonstrate the flow.
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 Left-Handed Metamaterial Design Guide
This left-handed metamaterials design guide provides an overview of how to design and optimize the performance of microwave devices constructed of these materials using Ansoft Designer® (Method of Moments) and HFSS™ (Finite Element Method). Detailed discussion about the design of the left-handed metamaterial unit-cells along with detailed setup for analysis of these unit-cells is presented. In addition, a leaky-wave antenna and a negative refractive index flat lens based on the analyzed left-handed unit-cells are simulated in Ansoft Designer and HFSS.
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 Nexxim White Paper
This paper introduces Nexxim’s capabilities and advantages and describes its use within the general design flow of RF/Mixed-signal IC design. It begins with a brief overview of industry trends and requirements for modern circuit simulation and design. Numerous simulation examples are provided, including a 2.4 GHz phase-locked loop (PLL), a complete Bluetooth® receiver, a highly nonlinear frequency divider, and an analog-to-digital converter (ADC). Inclusion of Nexxim in the mixed-signal design flow is discussed, followed by a summary of Nexxim’s unique features and advantages.
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 Power Integrity: PDS Design for FPGA Systems
"Virtex-4 Power System Performance"
Constructing low-noise power distribution systems (PDS) is essential for building reliable high-speed interfaces. In collaboration with Xilinx and Ansoft, signal integrity expert Dr. Howard Johnson presents techniques for clean PDS design. In a case-study involving a dense Virtex-4 PCB with multiple system interfaces, Dr. Johnson first explores the structure and purpose of a PCB power system in the context of a high-speed digital system with solid power and ground planes. Then he presents power system measurement techniques, contrasting what you want to measure with what you can measure. Next, with the assistance of Ansoft, he models the PDS of the boards with SIWave power system simulator. Finally, he correlates the simulation to lab measurements of the board under investigation.
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 RFIC Design White Paper - 0.13um RF CMOS Solution
"IC Design and Verification Solution for RF Analog & Digital Integration"
UMC and Ansoft have teamed to develop a design solution for complex systems that include custom RF and analog circuits. UMC’s advanced RFCMOS process combined with electronic design automation (EDA) tools from Ansoft and other established vendors provide the platform upon which advanced RFICs can be developed. Advanced simulation technologies provided by Ansoft’s Nexxim® simulator and HFSS™ 3D electromagnetic extractor enhance the Cadence RFIC design flow. This joint effort leverages UMC’s production-proven 0.13um RFCMOS process with advanced circuit simulation and electromagnetic extraction tools from Ansoft. This document describes RF and analog design and verification in the RFIC design flow. Circuits from an on-going project to develop an ultrawideband (UWB) multi-band orthogonal frequency division multiplexed (MB-OFDM) radio will be used as the vehicle to demonstrate the process technology, EDA tools and design flow.
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 RFID Radio Circuit Design in CMOS
This paper describes a reference design with circuits and an antenna for a UHF RFID system. A new Class 2 (Gen 2) tag was designed, including the extremely low-power integrated circuit integrated with an inexpensive printed antenna. Details on the design of the rectifier power regulator, demodulator, reset circuit, modulator, and antenna are highlighted. The paper includes a system-level software verification of the RFID tag system to determine proper voltage regulation and signal demodulation.
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 Spiral Design Kit and Whitepaper
The Virtual Spiral Inductor Design Kit is a set of technologies developed by Ansoft that enable the creation and simulation of complex 3D component models. The focus of this paper is to discuss the implementation of this technology for the generation and simulation of spiral inductors for RFIC/SoC applications.
This Design Kit provides reference models to allow the user to accurately characterize spiral inductors and to be able to use a parameterized library to explore a complex design space based on the physical parameters of the spiral inductors.
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