Vertical MOSFETs have a good performance for high-power applications. However, silicon high-voltage devices run into a high on-resistance and a current limit due to the quasi-saturation regimen. Based on the intrinsic...
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Vertical MOSFETs have a good performance for high-power applications. However, silicon high-voltage devices run into a high on-resistance and a current limit due to the quasi-saturation regimen. Based on the intrinsic material properties, both of these limitations are notably improved in vertical MOSFETs made on SiC compared to those made on Si. In addition, SiC is more appropriate for high temperature operation. In this paper these aspects have been analyzed by simulation in order to compare the performance of SiC devices with that of Si devices and to establish the best operation range for each material.
The design of microelectronic systems including hardware and software for open-loop and closed-loop control requires the combination of expertise from different domains. However, no integrated approach to the specific...
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The design of microelectronic systems including hardware and software for open-loop and closed-loop control requires the combination of expertise from different domains. However, no integrated approach to the specification and design nor to the analysis and simulation of the overall system is available. The design of such complex and heterogeneous systems mandates a systematic, computer aided approach to requirements definition, specification and design as well as to the verification and validation of the results. A simulation backplane concept is presented for parallel mixed-mode cosimulation using a standardized interface. Synchronization mechanisms are developed and used that allow an efficient concurrent cosimulation.
In the equivalent circuit model approach, the model is a non-linear distributed circuit where the circuit elements are related to familiar semiconductor device parameters. The well-established circuit simulation techn...
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In the equivalent circuit model approach, the model is a non-linear distributed circuit where the circuit elements are related to familiar semiconductor device parameters. The well-established circuit simulation techniques can therefore be applied to analyze the equivalent circuit. In this paper, we expand the model to the silicon photovoltaic cell by adding the photo-excitation. We illustrate this by an example in which monochromatic light is applied to one side of a p+/n junction cell. The output characteristics of the solar cell are then compared with the results from the Medici simulator. The design optimization of the solar cell and the effects on accuracy by reducing the number of sections in the model are also described.
The need for a common hardware description language (HDL) for mixed analog/digital ASICs has been realized and efforts are currently underway to define and implement an extension of VHDL towards analog language constr...
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The need for a common hardware description language (HDL) for mixed analog/digital ASICs has been realized and efforts are currently underway to define and implement an extension of VHDL towards analog language constructs. The authors discuss the progress in implementation and some of the main features of VHDL-A, which will be part of the final VHDL'97 standard. The CAD tools available for preliminary versions of VHDL-A are mentioned briefly.
The methodology of intelligent fuzzy controller design is introduced. The basis of the methodology is simulation of computer dynamics for mechanical systems with the help of qualitative physics and the search of possi...
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The methodology of intelligent fuzzy controller design is introduced. The basis of the methodology is simulation of computer dynamics for mechanical systems with the help of qualitative physics and the search of possible solutions with genetic algorithm (GA). On artificial neural networks optimal solutions are defined and knowledge base of fuzzy controller on the Weight Associative Rule Processor (WARP) is formed. Applications of this methodology on examples including a mobile robot for service use, a wall climbing robot (WCR) for decontamination of nuclear-power plant, a DC/DC converter and an apparatus for artificial ventilation of lungs, are examined.< >
design time constrains and high quality standards in manufacturing contemporary wireless products as well as their complexity create a need for computer tools helping to meet these conditions. This paper reports the d...
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design time constrains and high quality standards in manufacturing contemporary wireless products as well as their complexity create a need for computer tools helping to meet these conditions. This paper reports the development of a new software system for Computer Aided design of microelectronic circuits in wireless hardware. The major part of the system consists of a quick simulator which performs transient analysis using a spectral technique. The other components of the system allow for automation of analyses and postprocessing of data from a simulation. The entire system forms a flexible and portable framework which fills gaps between existing applications. An example of using the system to generate design curves for antenna amplifiers will be presented. RF circuits working at high frequencies exhibit sometimes chaotic behavior. Analysing that behavior using traditional approaches is inefficient and sometimes even impossible. Applying new mathematical tools like Lyapunov Exponents, Surfaces of Section, etc. simplifies the analysis and opens new possibilities for automation design procedures.
This document describes several effective Verilog coding techniques which, by increasing simulation performance, enables a seamless migration of a large scale electronic system through a wide range of abstraction for ...
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ISBN:
(纸本)0818656557
This document describes several effective Verilog coding techniques which, by increasing simulation performance, enables a seamless migration of a large scale electronic system through a wide range of abstraction for both the system description and the simulated verification. These coding techniques support the maintenance of design integrity during either forward or backward abstraction migration. This is accomplished by supporting mixed levels of detail for different system functions, and for the same system function at different time periods, during simulation.
A program to implement the Recursive Scaled Discrete Cosine Transform (DCT) algorithm as proposed by H. S. Hou has been undertaken at the Institute of microelectronics. Implementation of the design was done using top-...
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ISBN:
(纸本)0819414824
A program to implement the Recursive Scaled Discrete Cosine Transform (DCT) algorithm as proposed by H. S. Hou has been undertaken at the Institute of microelectronics. Implementation of the design was done using top-down design methodology with VHDL (VHSIC Hardware Description Language) for chip modeling. When the VHDL simulation has been satisfactorily completed, the design is synthesized into gates using a synthesis tool. The architecture of the design consists of two processing units together with a memory module for data storage and transpose. Each processing unit is composed of four pipelined stages which allow the internal clock to run at one-eighth (1/8) the speed of the pixel clock. Each stage operates on eight pixels in parallel. As the data flows through each stage, there are various adders and multipliers to transform them into the desired coefficients. The Scaled IDCT was implemented in a similar fashion with the adders and multipliers rearranged to perform the inverse DCT algorithm. The chip has been verified using Field Programmable Gate Array devices. The design is operational. The combination of fewer multiplications required and pipelined architecture give Hou's Recursive Scaled DCT good potential of achieving high performance at a low cost in using Very Large Scale Integration implementation.
This paper describes several effective Verilog coding techniques which, by increasing simulation performance, enable a seamless migration of a large scale electronic system through a wide range of abstraction for both...
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This paper describes several effective Verilog coding techniques which, by increasing simulation performance, enable a seamless migration of a large scale electronic system through a wide range of abstraction for both the system description and the simulated verification. These coding techniques support the maintenance of design integrity during either forward or backward abstraction migration. This is accomplished by supporting mixed levels of detail for different system functions, and for the same system function at different time periods, during simulation.< >
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