Analog is not dead

Article Abstract:

Improved modem technology, renewed interest in multi-carrier modulation, and the fact that there are still more analog than digital circuits demonstrate that analog communications is not a dead technology. High-performance modems that implement the International Telegraph and Telephone Consultative Committee V.32 standard offer up to 9.6K-bits/sec data transmission on public telephone systems, with up to 14.4K-bits/sec in extended V.32 versions. Multicarrier modulation, which involves dividing a serial bit stream into multiple parallel streams that modulate several carriers, enables up to 19.2K-bits/sec transmission on public telephone networks. The technique is also being applied to local-area networks and cellular radio. All-digital phone/data networks are imminent, as is exemplified by the growing number of Integrated-Services Digital Network trials and products.

Telephone and telegraph apparatus, Modems, Performance improvement (Computers), Modem, Trends, Market Analysis, Impact Analysis, Performance Improvement, Analog Communications

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How to automate analog IC designs

Article Abstract:

Knowledge-based computer-aided design (CAD) tools now allow basic analog integrated circuits (ICs) to be designed in hours rather than in weeks or months. These tools perform routine design functions and let designers employ such common analog blocks as op amps and voltage references without understanding details of their operation. The tools also facilitate exploration of relationships among a system's circuits, thereby enabling designers to improve overall system performance. The Idac knowledge-based design system for analog components is now available from the Centre Suisse d'Electronique et de Microtechnique (CSEM), and similar systems, such as Carnegie Mellon University's Oasys and the University of California's Opasyn are under development.

Product information, Universities and colleges, Systems analysis, Computer aided design, Expert systems, Analog integrated circuits, System Design, Functional Capabilities, Computer-Aided Design, technical, Centre Suisse d'Electronique et de Microtechnique

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Designing analog systems: concept to components

Article Abstract:

Software tools for designing analog systems are far less prevalent than for digital systems. Most companies use modified versions of SPICE (Simulation Program with Integrated Circuit Emphasis), which is primarily used for digital IC design. Sabre, from Analogy Inc, is a program that supports analog design through the three-level hierarchy of behavioral, functional, and primitive design parameters. Sabre facilitates the design process from only a specification of the end product to a definition of components.

Integrated circuits, Design, Computer Design, Analog Computers

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