Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710125
P. Kosel, R. Monreal, S. Fries-Carr, J. Weimer, S. Heidger, R. Wu
Polycrystalline diamond (PCD) can be grown over a range of thicknesses from 2 /spl mu/m to over 200 /spl mu/m by a variety of techniques. The PCD films can be obtained with very high resistivities exceeding 10/sup 11/ /spl Omega/-cm or they can be doped with boron to produce high resistance conductors. Metal bonds to polycrystalline diamond (PCD) are important for the realization of ohmic contacts for electronic devices and the adhesion of PCD films to various materials in the fabrication of PCD-based sensors and actuators. We have investigated the formation of titanium contacts on PCD and aluminum silicide bonding of the PCD films to a variety of substrates by rapid thermal techniques. All high temperature process times were kept to 2.5 minutes and only the maximum temperature was varied for optimum results in each sintering step. Two alternative rapid thermal processing systems were used: (a) a cylindrical cavity system with a narrow area coverage for the formation of titanium carbide and titanium silicide bonds, and (b) a rectangular cavity system with large area coverage for the formation of aluminum silicide bonds. The cylindrical cavity system was capable of achieving higher temperatures and was, therefore, used for the formation of the Ti/PCD and Ti/Si contacts. Optimum sintering temperatures were found to be: 885/spl plusmn/15/spl deg/C for Ti/PCD contacts, 710/spl plusmn/5/spl deg/C for Ti/Si and 650/spl deg/C for Al/Si for 36 /spl mu/m thick aluminum foil. Argon gas was used for the ambient in all sintering operations.
{"title":"Multilayer capacitors in polycrystalline diamond by rapid thermal annealing","authors":"P. Kosel, R. Monreal, S. Fries-Carr, J. Weimer, S. Heidger, R. Wu","doi":"10.1109/NAECON.1998.710125","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710125","url":null,"abstract":"Polycrystalline diamond (PCD) can be grown over a range of thicknesses from 2 /spl mu/m to over 200 /spl mu/m by a variety of techniques. The PCD films can be obtained with very high resistivities exceeding 10/sup 11/ /spl Omega/-cm or they can be doped with boron to produce high resistance conductors. Metal bonds to polycrystalline diamond (PCD) are important for the realization of ohmic contacts for electronic devices and the adhesion of PCD films to various materials in the fabrication of PCD-based sensors and actuators. We have investigated the formation of titanium contacts on PCD and aluminum silicide bonding of the PCD films to a variety of substrates by rapid thermal techniques. All high temperature process times were kept to 2.5 minutes and only the maximum temperature was varied for optimum results in each sintering step. Two alternative rapid thermal processing systems were used: (a) a cylindrical cavity system with a narrow area coverage for the formation of titanium carbide and titanium silicide bonds, and (b) a rectangular cavity system with large area coverage for the formation of aluminum silicide bonds. The cylindrical cavity system was capable of achieving higher temperatures and was, therefore, used for the formation of the Ti/PCD and Ti/Si contacts. Optimum sintering temperatures were found to be: 885/spl plusmn/15/spl deg/C for Ti/PCD contacts, 710/spl plusmn/5/spl deg/C for Ti/Si and 650/spl deg/C for Al/Si for 36 /spl mu/m thick aluminum foil. Argon gas was used for the ambient in all sintering operations.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"236 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114474647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710215
G. D. Peterson, M. Mills
The ever-increasing complexity of electronic systems and interdependency of hardware and software throughout the system life cycle makes it imperative to develop effective electronic design automation languages, methodologies, and tools. Commercial systems face increasing complexity and performance requirements, while achieving decreasing times to market and maximizing profits despite shrinking product life-cycles. Defense systems face similar issues, but must also support life cycles spanning years or decades, thus requiring redesign support or prevention of parts obsolescence challenges. For cost-effective development of systems in this context, design teams need to exploit the best commercial and defense design practices and adapt them as needed to also support concurrent engineering considerations. This paper explores requirements for the emerging system level design language and the methodological needs for it to support multi-disciplinary design, including hardware software co-design, mechanical and packaging support, concurrent engineering, test, and related issues. By employing these techniques and representations, weapons systems acquisition programs will reduce technical, cost, and schedule risk to help ensure mission success.
{"title":"Mission success: meeting the systems acquisition challenge with electronic systems design automation","authors":"G. D. Peterson, M. Mills","doi":"10.1109/NAECON.1998.710215","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710215","url":null,"abstract":"The ever-increasing complexity of electronic systems and interdependency of hardware and software throughout the system life cycle makes it imperative to develop effective electronic design automation languages, methodologies, and tools. Commercial systems face increasing complexity and performance requirements, while achieving decreasing times to market and maximizing profits despite shrinking product life-cycles. Defense systems face similar issues, but must also support life cycles spanning years or decades, thus requiring redesign support or prevention of parts obsolescence challenges. For cost-effective development of systems in this context, design teams need to exploit the best commercial and defense design practices and adapt them as needed to also support concurrent engineering considerations. This paper explores requirements for the emerging system level design language and the methodological needs for it to support multi-disciplinary design, including hardware software co-design, mechanical and packaging support, concurrent engineering, test, and related issues. By employing these techniques and representations, weapons systems acquisition programs will reduce technical, cost, and schedule risk to help ensure mission success.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131239367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710139
O. Yakimenko, V. Dobrokhodov
It's considered the capability of developed before simplified modification of direct method of boundary trajectory optimizational tasks with the fixed edges conditions solution application for formation of near-optimal trajectories in tasks with mobile right end. The possibility and expediency of permissible controls class expansion is investigated from the standpoint of labor input of solution obtaining and effectiveness of this solution. Examples of particular quasi-optimal solutions are discussed. The applicability of the developed algorithms both for mathematical modeling on fixed computers and for realization in onboard pilot's control actions during maneuvering support system (system of real time) is evaluated.
{"title":"Airplane trajectory control at the stage of rendezvous with maneuvering object algorithms synthesis","authors":"O. Yakimenko, V. Dobrokhodov","doi":"10.1109/NAECON.1998.710139","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710139","url":null,"abstract":"It's considered the capability of developed before simplified modification of direct method of boundary trajectory optimizational tasks with the fixed edges conditions solution application for formation of near-optimal trajectories in tasks with mobile right end. The possibility and expediency of permissible controls class expansion is investigated from the standpoint of labor input of solution obtaining and effectiveness of this solution. Examples of particular quasi-optimal solutions are discussed. The applicability of the developed algorithms both for mathematical modeling on fixed computers and for realization in onboard pilot's control actions during maneuvering support system (system of real time) is evaluated.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116198524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710095
F. Ahmed, M. Atiqullah, T. Svobodny
A parallel algorithm for the computation of the control that steers the zero state of Schrodinger equation to an arbitrary state has been investigated. The control is partially distributed on a subset of the state domain. We report the difficulties encountered, as well as the attempts to surmount them taking into account the capabilities of parallel computing facilities. We discuss the inherent parallelization of the solution to the problem and some algorithms for its implementations. The results of computations done on vectored (Cray Y-MP) and parallel machines (CM-200) are presented.
{"title":"Parallel computation of the partially distributed control of the Schrodinger equation","authors":"F. Ahmed, M. Atiqullah, T. Svobodny","doi":"10.1109/NAECON.1998.710095","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710095","url":null,"abstract":"A parallel algorithm for the computation of the control that steers the zero state of Schrodinger equation to an arbitrary state has been investigated. The control is partially distributed on a subset of the state domain. We report the difficulties encountered, as well as the attempts to surmount them taking into account the capabilities of parallel computing facilities. We discuss the inherent parallelization of the solution to the problem and some algorithms for its implementations. The results of computations done on vectored (Cray Y-MP) and parallel machines (CM-200) are presented.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126868551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710218
F.C.D. Young, J.A. Houston
Sustaining weapons system hardware and software represents a significant and ever-increasing portion of total system cost. Hardware components are becoming obsolete much sooner while weapons system lifetimes are increasing. We must identify more cost-effective solutions to engineering and reengineering these subsystems. Verifying and validating weapons systems are two of the most costly parts of either engineering process. Traditionally, hardware validation and verification is done by simulation and testing. In the past few years, math-and logic-based formal methods tools have begun to scale up to and be applied successfully to real-world problems. Incorporating formal verification methods into engineering and reengineering processes will cost-effectively and significantly improve the level of trust and the quality of our weapons systems. Formal methods are especially well suited for redesigning current weapon systems which have become unsupportable due to component obsolescence because they help minimize the astronomical costs of rigorously reverifying the reengineered components. We believe that formal methods are an important tool for effective engineering of future weapon systems.
{"title":"Formal verification and legacy redesign","authors":"F.C.D. Young, J.A. Houston","doi":"10.1109/NAECON.1998.710218","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710218","url":null,"abstract":"Sustaining weapons system hardware and software represents a significant and ever-increasing portion of total system cost. Hardware components are becoming obsolete much sooner while weapons system lifetimes are increasing. We must identify more cost-effective solutions to engineering and reengineering these subsystems. Verifying and validating weapons systems are two of the most costly parts of either engineering process. Traditionally, hardware validation and verification is done by simulation and testing. In the past few years, math-and logic-based formal methods tools have begun to scale up to and be applied successfully to real-world problems. Incorporating formal verification methods into engineering and reengineering processes will cost-effectively and significantly improve the level of trust and the quality of our weapons systems. Formal methods are especially well suited for redesigning current weapon systems which have become unsupportable due to component obsolescence because they help minimize the astronomical costs of rigorously reverifying the reengineered components. We believe that formal methods are an important tool for effective engineering of future weapon systems.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127813334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710146
J. Carr, J. Root, R. Fetner, R. Richmond
The Airdrop Ballistic Winds (ABW) team, within the Air Force Research Laboratory, Sensors Directorate, Electro-Optic (EO) Sensor Technology Division, Multi-Function EO Branch (AFRL/SNJM), at Wright-Patterson AFB, Ohio, is preparing to flight test a 2 micron laser radar (lidar) inside a modified C-130 fuel pod. This system, called the Operationally Capable Lidar (OCL), is designed to provide real-time, 3-Dimensional maps of wind fields between the aircraft and the ground, and is expected to significantly improve airdrop accuracy from high altitudes. This paper briefly describes the wind profiling system, the Precision Airdrop Simulation (PADS), and upcoming flight test activities, including the Precision Airdrop Integrated Demonstration which will be conducted at Yuma Proving Grounds (YPG), Arizona, from 29 August through 12 September 1998.
{"title":"Operationally capable lidar","authors":"J. Carr, J. Root, R. Fetner, R. Richmond","doi":"10.1109/NAECON.1998.710146","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710146","url":null,"abstract":"The Airdrop Ballistic Winds (ABW) team, within the Air Force Research Laboratory, Sensors Directorate, Electro-Optic (EO) Sensor Technology Division, Multi-Function EO Branch (AFRL/SNJM), at Wright-Patterson AFB, Ohio, is preparing to flight test a 2 micron laser radar (lidar) inside a modified C-130 fuel pod. This system, called the Operationally Capable Lidar (OCL), is designed to provide real-time, 3-Dimensional maps of wind fields between the aircraft and the ground, and is expected to significantly improve airdrop accuracy from high altitudes. This paper briefly describes the wind profiling system, the Precision Airdrop Simulation (PADS), and upcoming flight test activities, including the Precision Airdrop Integrated Demonstration which will be conducted at Yuma Proving Grounds (YPG), Arizona, from 29 August through 12 September 1998.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127352971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710214
B. Y. Soon, M. Karim, M. Alam
In recent years, feature extraction using an optical correlator shows promising edge enhancement potential. Hereby, we investigate the performance of the Laplace and Sobel operators in feature extraction for multiple targets. The undesired terms such as the zero-order and false alarm terms are removed by the power spectrum subtraction technique. Also, the separated target and reference planes method is incorporated into the joint wavelet transform correlator to maximize the space-bandwidth product of a magneto-optic spatial light modulator. A cost effective and efficient optoelectronic hardware is proposed for realtime optical correlation. The aforementioned result is verified by computer simulation for both cases; in noise free and in overlapping additive noise corruption situations using both the Laplace and Sobel operators. The Laplace operator could be implemented with lesser steps and is most appropriate for real-time correlation. The Sobel operator yields better edge information and has higher tolerance to noise corruption but required additional correlation steps at the expense of more computation time.
{"title":"Efficient edge enhancement using real time optical correlation","authors":"B. Y. Soon, M. Karim, M. Alam","doi":"10.1109/NAECON.1998.710214","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710214","url":null,"abstract":"In recent years, feature extraction using an optical correlator shows promising edge enhancement potential. Hereby, we investigate the performance of the Laplace and Sobel operators in feature extraction for multiple targets. The undesired terms such as the zero-order and false alarm terms are removed by the power spectrum subtraction technique. Also, the separated target and reference planes method is incorporated into the joint wavelet transform correlator to maximize the space-bandwidth product of a magneto-optic spatial light modulator. A cost effective and efficient optoelectronic hardware is proposed for realtime optical correlation. The aforementioned result is verified by computer simulation for both cases; in noise free and in overlapping additive noise corruption situations using both the Laplace and Sobel operators. The Laplace operator could be implemented with lesser steps and is most appropriate for real-time correlation. The Sobel operator yields better edge information and has higher tolerance to noise corruption but required additional correlation steps at the expense of more computation time.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133691684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710133
D. Ferens
There are many sophisticated models and methods for estimating the size, cost, and schedule of software projects. However, the ability to accurately estimate software cost, size, or schedule is still dubious. In general the predictive accuracy of models for estimating software development cost and schedule has not been shown to be better than "within 25 percent of actual cost or schedule, about one half of the time", especially for Department of Defense software efforts. The same is true for software size estimating models and methods, although there are some studies that have shown superior results. For software support (or maintenance) cost estimation, no model has been demonstrated to be accurate. This paper presents a summary of efforts performed to date which demonstrate the accuracy (or lack thereof) of software models. The results of several studies in the areas of software development cost and schedule estimation, size estimation, and support cost estimation are presented to show what these models can and can not do. Some ideas for improvement are also presented, including the results of some studies which may lead to a resolution of the accuracy conundrum which currently exists.
{"title":"The conundrum of software estimation models","authors":"D. Ferens","doi":"10.1109/NAECON.1998.710133","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710133","url":null,"abstract":"There are many sophisticated models and methods for estimating the size, cost, and schedule of software projects. However, the ability to accurately estimate software cost, size, or schedule is still dubious. In general the predictive accuracy of models for estimating software development cost and schedule has not been shown to be better than \"within 25 percent of actual cost or schedule, about one half of the time\", especially for Department of Defense software efforts. The same is true for software size estimating models and methods, although there are some studies that have shown superior results. For software support (or maintenance) cost estimation, no model has been demonstrated to be accurate. This paper presents a summary of efforts performed to date which demonstrate the accuracy (or lack thereof) of software models. The results of several studies in the areas of software development cost and schedule estimation, size estimation, and support cost estimation are presented to show what these models can and can not do. Some ideas for improvement are also presented, including the results of some studies which may lead to a resolution of the accuracy conundrum which currently exists.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"161 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134502586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710201
S. Drager, H. Carter, H. Hirsch
This paper describes an Air Force Research Laboratory (formerly Rome Laboratory) development program entitled "Mixed Signal Technology Integration Environment," or "MISTIE." The technologies and tools developed under this program improve a designer's capability to deal with the increasing complexity of today's analog, mixed-signal and mixed-technology designs, as a simulator and design environment for VHDL-AMS (VHDL extensions for Analog and mixed Signal as defined by IEEE 1076. 1). The tool suite integrates analog and digital simulation kernels with support tools, to provide a complete analog and mixed signal or mixed technology design environment.
{"title":"A VHDL-AMS mixed-signal, mixed-technology design tool","authors":"S. Drager, H. Carter, H. Hirsch","doi":"10.1109/NAECON.1998.710201","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710201","url":null,"abstract":"This paper describes an Air Force Research Laboratory (formerly Rome Laboratory) development program entitled \"Mixed Signal Technology Integration Environment,\" or \"MISTIE.\" The technologies and tools developed under this program improve a designer's capability to deal with the increasing complexity of today's analog, mixed-signal and mixed-technology designs, as a simulator and design environment for VHDL-AMS (VHDL extensions for Analog and mixed Signal as defined by IEEE 1076. 1). The tool suite integrates analog and digital simulation kernels with support tools, to provide a complete analog and mixed signal or mixed technology design environment.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134509829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1998-07-13DOI: 10.1109/NAECON.1998.710183
A. Cherri, M. S. Alam
Recently, highly-efficient two-step recoded and one-step nonrecoded trinary signed-digit (TSD) carry-free adder/subtracter has been presented based on redundant bit representation (RBR) for the operands digits where it has been shown that only 24 (30) minterms are needed to implement the two-step recoded TSD (the one-step nonrecoded) addition for any operand length. In this paper, we present four different multiplication designs based on our proposed recoded and nonrecoded TSD adders. Our multiplication designs require a small number of reduced minterms to generate the multiplication partial products.
{"title":"Recoded and nonrecoded trinary signed-digit multipliers designs using redundant bit representations","authors":"A. Cherri, M. S. Alam","doi":"10.1109/NAECON.1998.710183","DOIUrl":"https://doi.org/10.1109/NAECON.1998.710183","url":null,"abstract":"Recently, highly-efficient two-step recoded and one-step nonrecoded trinary signed-digit (TSD) carry-free adder/subtracter has been presented based on redundant bit representation (RBR) for the operands digits where it has been shown that only 24 (30) minterms are needed to implement the two-step recoded TSD (the one-step nonrecoded) addition for any operand length. In this paper, we present four different multiplication designs based on our proposed recoded and nonrecoded TSD adders. Our multiplication designs require a small number of reduced minterms to generate the multiplication partial products.","PeriodicalId":202280,"journal":{"name":"Proceedings of the IEEE 1998 National Aerospace and Electronics Conference. NAECON 1998. Celebrating 50 Years (Cat. No.98CH36185)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133194476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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