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Author: David Nathan Abramson
Publisher:
ISBN:
Category : Electronic analog computers
Languages : en
Pages :
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Book Description
With the introduction of the floating-gate transistor into reconfigurable architectures, great advances have been made in the field. Recently, Hall et. al. have proposed the first truly large-scale field programmable analog array (FPAA). As an outgrowth of this work, a new class of FPAAs based on translinear elements has begun to be developed. The use of translinear elements, multiple input translinear elements (MITEs) specifically, allows for extreme versatility in the functions implemented by the system while keeping the computational elements of the FPAA regular. In addition, synthesis procedures have been developed for translinear elements. This facilitates the implementation of large-scale systems on the FPAA because the circuit design can be extracted using the synthesis procedures based on equations entered by the user. Two architectures are proposed for the new FPAA. The first architecture uses fine grain reconfigurability, every gate capacitor and the drain of each MITE can be connected arbitrarily, in order to create reconfigurable MITE networks. Circuits including a squaring circuit, a square root circuit, a translinear loop, a vector magnitude circuit, and a 1st-order log-domain filter were implemented using this architecture and results are presented. In addition, examples are shown to illustrate the compilation of the circuits onto the FPAA. The second proposed architecture uses a mix of fine and medium granularity in order to simplify the implementation of larger systems. Examples are given and again the compilation of the circuits onto the FPAA is shown.
Author: David Nathan Abramson
Publisher:
ISBN:
Category : Electronic analog computers
Languages : en
Pages :
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Book Description
With the introduction of the floating-gate transistor into reconfigurable architectures, great advances have been made in the field. Recently, Hall et. al. have proposed the first truly large-scale field programmable analog array (FPAA). As an outgrowth of this work, a new class of FPAAs based on translinear elements has begun to be developed. The use of translinear elements, multiple input translinear elements (MITEs) specifically, allows for extreme versatility in the functions implemented by the system while keeping the computational elements of the FPAA regular. In addition, synthesis procedures have been developed for translinear elements. This facilitates the implementation of large-scale systems on the FPAA because the circuit design can be extracted using the synthesis procedures based on equations entered by the user. Two architectures are proposed for the new FPAA. The first architecture uses fine grain reconfigurability, every gate capacitor and the drain of each MITE can be connected arbitrarily, in order to create reconfigurable MITE networks. Circuits including a squaring circuit, a square root circuit, a translinear loop, a vector magnitude circuit, and a 1st-order log-domain filter were implemented using this architecture and results are presented. In addition, examples are shown to illustrate the compilation of the circuits onto the FPAA. The second proposed architecture uses a mix of fine and medium granularity in order to simplify the implementation of larger systems. Examples are given and again the compilation of the circuits onto the FPAA is shown.
Author: Edmund Pierzchala
Publisher: Springer Science & Business Media
ISBN: 1475752245
Category : Technology & Engineering
Languages : en
Pages : 166
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Book Description
Field-Programmable Analog Arrays brings together in one place important contributions and up-to-date research results in this fast moving area. Field-Programmable Analog Arrays serves as an excellent reference, providing insight into some of the most challenging research issues in the field.
Author: Craig Richard Schlottmann
Publisher:
ISBN:
Category : Signal processing
Languages : en
Pages :
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Book Description
The purpose of this research is to create a solid framework for embedded system design with field-programmable analog arrays (FPAAs). To achieve this goal, we've created a unified approach to the three phases of FPAA system design: (1) the hardware architecture; (2) the circuit design and modeling; and (3) the high-level software tools. First, we describe innovations to the reconfigurable analog hardware that enable advanced signal processing and integration into embedded systems. We introduce the multiple-input translinear element (MITE) FPAA and the dynamically-reconfigurable RASP 2.9v FPAA, which was designed explicitly for interfacing with external digital systems. This compatibility creates a streamlined workflow for dropping the FPAA hardware into mixed-signal embedded systems. The second phase, algorithm analysis and modeling, is important to create a useful and reliable library of components for the system designer. We discuss the concept and procedure of analog abstraction that empowers non-circuit design engineers to take full advantage of analog techniques. We use the analog vector-matrix multiplier as an example for a detailed discussion on computational analog analysis and system mapping to the FPAA. Lastly, we describe high-level software tools, which are an absolute necessity for the design of large systems due to the size and complexity of modern FPAAs. We describe the Sim2Spice tool, which allows system designers to develop signal processing systems in the Simulink environment. The tool then compiles the system to the FPAA hardware. By coordinating the development of these three phases, we've created a solid unified framework that empowers engineers to utilize FPAAs.
Author: Christopher M. Twigg
Publisher:
ISBN:
Category : Field programmable gate arrays
Languages : en
Pages :
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Book Description
Large-scale reconfigurable and programmable analog devices provide a new option for prototyping and synthesizing analog circuits for analog signal processing and beyond. Field-programmable analog arrays (FPAAs) built upon floating gate transistor technologies provide the analog reconfigurability and programmability density required for large-scale devices on a single integrated circuit (IC). A wide variety of synthesized circuits, such as OTA followers, band-pass filters, and capacitively coupled summation/difference circuits, were measured to demonstrate the flexibility of FPAAs. Three generations of devices were designed and tested to verify the viability of such floating gate based large-scale FPAAs. Various architectures and circuit topologies were also designed and tested to explore the trade-offs present in reconfigurable analog systems. In addition, large-scale FPAAs have been incorporated into class laboratory exercises, which provide students with a much broader range of circuit and IC design experiences than have been previously possible. By combining reconfigurable analog technologies with an equivalent large-scale digital device, such as a field-programmable gate array (FPGA), an extremely powerful and flexible mixed signal development system can be produced that will enable all of the benefits possible through cooperative analog/digital signal processing (CADSP).
Author: Craig Richard Schlottmann
Publisher:
ISBN:
Category : Field programmable gate arrays
Languages : en
Pages :
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Book Description
The Cooperative Analog/Digital Signal Processing (CADSP) research group's approach to signal processing is to see what opportunities lie in adjusting the line between what is traditionally computed in digital and what can be done in analog. By allowing more computation to be done in analog, we can take advantage of its low power, continuous domain operation, and parallel capabilities. One setback keeping Analog Signal Processing (ASP) from achieving more wide-spread use, however, is its lack of programmability. The design cycle for a typical analog system often involves several iterations of the fabrication step, which is labor intensive, time consuming, and expensive. These costs in both time and money reduce the likelihood that engineers will consider an analog solution. With CADSP's development of a reconfigurable analog platform, a Field-Programmable Analog Array (FPAA), it has become much more practical for systems to incorporate processing in the analog domain. In this Thesis, I present an entire chain of tools that allow one to design simply at the system block level and then compile that design onto analog hardware. This tool chain uses the Simulink design environment and a custom library of blocks to create analog systems. I also present several of these ASP blocks, covering a broad range of functions from matrix computation to interfacing. In addition to these tools and blocks, the most recent FPAA architectures are discussed. These include the latest RASP general-purpose FPAAs as well as an adapted version geared toward high-speed applications.
Author: Martin A. Brooke
Publisher:
ISBN:
Category :
Languages : en
Pages : 242
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 136
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Book Description
This report is a compilation of largely unpublished work pertaining to reconfigurable cellular arrays for digital computation. They bear resemblance to both cellular automata and cellular neural networks, with the attributes of field programmable gate arrays. They are of potential interest to nano-scale / molecular-scale electronics approaches due to their simple, periodic arrangement. As such they address three critical issues at the smallest physical scales: (1) low-interconnect demand; (2) defect tolerance; (3) simplified construction through non-lithographic approaches (such as chemical self-assembly). The report exposes many facets of these arrays, including the ability to directly model their structures with artificial neural networks, which can be trained to implement digital functions directly. The report is intended to represent a snapshot of work against a very difficult problem, rich- in future research exploration opportunities.
Author: James C. Lyke
Publisher:
ISBN: 9781423527268
Category :
Languages : en
Pages : 136
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Book Description
This report is a compilation of largely unpublished work pertaining to reconfigurable cellular arrays for digital computation. They bear resemblance to both cellular automata and cellular neural networks, with the attributes of field programmable gate arrays. They are of potential interest to nano-scale / molecular-scale electronics approaches due to their simple, periodic arrangement. As such they address three critical issues at the smallest physical scales: (1) low-interconnect demand; (2) defect tolerance; (3) simplified construction through non-lithographic approaches (such as chemical self- assembly). The report exposes many facets of these arrays, including the ability to directly model their structures with artificial neural networks, which can be trained to implement digital functions directly. The report is intended to represent a snapshot of work against a very difficult problem, rich- in future research exploration opportunities
Author: Shih-Chii Liu
Publisher: John Wiley & Sons
ISBN: 111892763X
Category : Technology & Engineering
Languages : en
Pages : 440
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Book Description
Neuromorphic electronic engineering takes its inspiration from the functioning of nervous systems to build more power efficient electronic sensors and processors. Event-based neuromorphic systems are inspired by the brain's efficient data-driven communication design, which is key to its quick responses and remarkable capabilities. This cross-disciplinary text establishes how circuit building blocks are combined in architectures to construct complete systems. These include vision and auditory sensors as well as neuronal processing and learning circuits that implement models of nervous systems. Techniques for building multi-chip scalable systems are considered throughout the book, including methods for dealing with transistor mismatch, extensive discussions of communication and interfacing, and making systems that operate in the real world. The book also provides historical context that helps relate the architectures and circuits to each other and that guides readers to the extensive literature. Chapters are written by founding experts and have been extensively edited for overall coherence. This pioneering text is an indispensable resource for practicing neuromorphic electronic engineers, advanced electrical engineering and computer science students and researchers interested in neuromorphic systems. Key features: Summarises the latest design approaches, applications, and future challenges in the field of neuromorphic engineering. Presents examples of practical applications of neuromorphic design principles. Covers address-event communication, retinas, cochleas, locomotion, learning theory, neurons, synapses, floating gate circuits, hardware and software infrastructure, algorithms, and future challenges.
Author: Hank Chung-Hung Chen
Publisher:
ISBN:
Category :
Languages : en
Pages : 114
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Book Description
