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Hybrid Computer Combines Best of Analog and Digital
A "hybrid" computer that introduced a new concept in engineering and scientific computation by combining the best operational features of analog and digital computers into an integrated system, was demonstrated for the first time by its manufacturer, Electronic Associates, Inc., of Long Branch, N.J., at the Western Joint Computer Conference (the USA).
A "hybrid" computer was demonstrated for the first time at the Western Joint Computer Conference (the USA).
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The new computer was designed primarily as a scientific instrument for a range of research, design and development applications in industry, defense and civilian space programs as well as commercial application for a variety of design and production problems.
This new computer was designed for different applications
HYDEC (hybrid digital/analog computer) is the result of a four-year-long research program conducted by computation division at Princeton, and represents the first major change of direction in computer development in 10 years.
HYDEC (hybrid digital/analog computer) is the result of four-year long research program.
The new computer HYDEC combines the traditional advantages of both analog and digital computers - the analog's speed, lower cost, ease of programming and the digital's capacity for data storage, decision making logic operations and time sharing of components - into one centralized system to achieve a computation efficiently that is well beyond the limits of either computer used alone.
HYDEC combines the traditional advantages of analog and digital computers into one centralized system.
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ABSTRACT (SUMMARY)
As the title implies, the paper describes a new computer, which was demonstrated at the Western Joint Computer Conference (the USA). The name of this computer is HYDAC (hybrid digital/analog computer), and it is designed for different applications. It is reported that the HYDAC is the result of a four-year-long research program. Much attention is given to the fact that the HYDAC combines the traditional advantages of analog and digital computers into one centralized system. The paper is of interest to specialists working in the computer field.
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Rick Cushing, Single-Sideband Upconversion of Quadrature DDS Signals to the 800-to-2500-MHz Band Ph.D. University of Pittsburgh, 1998 DAI-B 59/06, p. 2797, Dec 1998.
The paper under discussion covers the area of radio engineering and deals with a problem of low frequency signals and their quadrature modulation. Its key idea is to introduce the basic unconvert principles for quadrature low-frequency signals carried by means of direct digital synthesis. The engineering approach to the problem is based on upconversion methodology to suggest innovative solutions for low-frequency signals by means of integrated circuits. Besides, a problem of transformation without loss of quality is thoroughly considered. The results of laboratory studies on direct digital synthesis are analyzed in detail. Particular attention is given to the main parameters of signals with view to their transformation characteristics. The data obtained are backed up by the figures given to illustrate the main transformation processes and their properties. The material presented can open new prospects for further research studies. It seems to be interesting to those who work in the field of digital radio engineering.
Key words: digital radio engineering, low frequency signals, quadrature modulation, upconversion methodology, direct digital synthesis.
