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Showing papers on "Physical design published in 1969"


Book
15 Jan 1969
TL;DR: In this paper, the physical principles involved in the operation of semiconductor components, proceeds through the physical electronics, modeling, and circuit characteristics of these components, and engages the questions and problems that arise in the computer-aided design of complex multicomponent functional assemblies of the type found in modern integrated-circuit packages.
Abstract: This book begins with the physical principles involved in the operation of semiconductor components, proceeds through the physical electronics, modeling, and circuit characteristics of these components, and engages the questions and problems that arise in the computer-aided design of complex multicomponent functional assemblies of the type found in modern integrated-circuit packages.

79 citations


Journal ArticleDOI
TL;DR: This paper is a condensed survey of design principles that make use of the advantages offered in monolithic structures: close matching and tracking of parameters, control over component geometries, and the availability of a large number of active devices at little extra cost.
Abstract: The components available in integrated circuits are well known for their large tolerances and temperature coefficients. This paper is a condensed survey of design principles that make use of the advantages offered in monolithic structures: close matching and tracking of parameters, control over component geometries, and the availability of a large number of active devices at little extra cost. With these techniques it is, in many cases, possible to duplicate or even exceed the performance of discrete component linear circuits.

33 citations


Book
01 Jan 1969

27 citations


Patent
11 Jun 1969
TL;DR: In this paper, a data processor generates and stores a representation of a continuous analytical objective function, which is then used in the operation of the data processor to obtain a specified performance characteristic for a given circuit topology.
Abstract: Using representations of circuit topologies and initial values of all elements, a circuit design may be modified by an automated data processing machine to improve operation for at least one performance characteristic by changing design variables. A desired circuit topology is selected and the initial values for all the circuit elements are coded and stored in the data processor. In addition, the desired performance characteristic is also selected and coded. Using coded input information, the data processor generates and stores a representation of a continuous analytical objective function. In the operation of the data processor, a value of the objective function is generated and stored. This value is dependent upon the sum of a power function of the difference between an actual performance and a specified performance characteristic. To obtain a specified performance characteristic for a given circuit topology, the value of the objective function is improved.

23 citations



Proceedings ArticleDOI
01 Jan 1969
TL;DR: A computer-aided topological layout of components and wiring in integrated circuits will be presented based on a new kind of graph which accounts for all technological restrictions, as well as possibilities.
Abstract: A computer-aided topological layout of components and wiring in integrated circuits will presented based on a new kind of graph which accounts for all technological restrictions, as well as possibilities.

12 citations


Proceedings ArticleDOI
B. Agusta1
01 Jan 1969
TL;DR: The design and structure of a 64-bit silicon chip will be presented and some aspects of the organization and circuit design discussed.
Abstract: A 40-ns access bipolar monolithic memory of 2021 words × 144 bits capacity has been developed and incorporated in a computing system. The design and structure of a 64-bit silicon chip will be presented and some aspects of the organization and circuit design discussed.

12 citations


Proceedings ArticleDOI
W. K. Orr1
18 Nov 1969
TL;DR: An overview of the complete computer-aided design (CAD) system, highlighting its more distinctive features and specific experiences with it can therefore be discussed.
Abstract: The computer-aided design (CAD) system described herein was developed to aid in the design of digital systems to be implemented by custom integrated circuits (CIC) and multi-chip hybrid custom integrated systems (CIS). The terms MSI/LSI are avoided here due to the general confusion which exists in the literature as to what constitutes an MSI/LSI circuit. The CAD system philosophy is that each CIC is implemented from a selected set of "library elements". This design approach results in some size inefficiencies, compared with manual designs, but provides many advantages, of which flexibility and a shortened design cycle are the most important. This CAD system captures fundamental design information in a machine-readable form early in the design process, thus maximizing potential computer assistance and minimizing costly and time-consuming errors. This paper contains an overview of the complete CAD system, highlighting its more distinctive features. The complete system has been operational on a 360/30 for several months, and specific experiences with it can therefore be discussed.

4 citations



Journal ArticleDOI
TL;DR: Student experience with each mode of operation is described, including student reaction, relative gains through each type of operation, problems encountered, and exportability of this work to other schools and machines.
Abstract: Computer programs which allow interactionbetweenthe user and the machine in the design of linear circuits have been used by students of a graduate course in computer-aided circuit design. These programs, which enable the determination of circuit element nominal values to realize responses within specified constraints, have been operated both with batch processing and on-line through commercial time sharing utilities. Student experience with each mode of operation is described, including student reaction, relative gains through each type of operation, problems encountered, and exportability of this work to other schools and machines. Use of a typical interactive program for on-line design of an ac circuit is described in detail.

3 citations


Proceedings ArticleDOI
01 Jan 1969
TL;DR: A topological layout project for IC components using a computer, based on given circuit diagrams and order of bonding pads, is discussed.
Abstract: This paper will discuss a topological layout project for IC components using a computer, based on given circuit diagrams and order of bonding pads.

Proceedings ArticleDOI
Philip Balaban1
18 Nov 1969
TL;DR: Computer simulation of electronic circuits and systems has become an increasingly important tool in circuit and system design to perform optimization and tolerance analysis of a circuit which requires many evaluations of the circuit with different sets of parameters.
Abstract: Computer simulation of electronic circuits and systems has become an increasingly important tool in circuit and system design. Such simulations enable one to:1. Eliminate the necessity of building many breadboard models in order to evaluate different design approaches.2. Analyze the performance of the circuit as a function of different parameters.3. Model semiconductor devices and integrated circuits so that intrinsic parameters become accessible.4. Perform optimization and tolerance analysis of a circuit which requires many evaluations of the circuit with different sets of parameters.

01 Jan 1969
TL;DR: History of computer-aided design began with the coding and evaluation of simple formulas in physical design, but since time-sharing in computers has become a practical reality, problems that are too complex to be put entirely on the computer are now able to be treated.
Abstract: : Historically, the evolutionary process in computer-aided design began with the coding and evaluation of simple formulas in physical design. As computers became faster--with the coming of second generation machines such as the IBM 7090--more complex problems, such as logic circuit simulation and electronic circuit analysis, became feasible with computers. Successive design by trial and error methods, however, was not generally practiced, due to the excessive turn-around times associated with batch processing. Since time-sharing in computers has become a practical reality, we are now able to treat problems that are too complex to be put entirely on the computer. These problems involve the successive testing of hypothetical solutions until a satisfactory design is achieved. In the real-time dialogue between man and machine, the man controls the decision processes, while the machine does the step-by-step solutions. (Author)

Proceedings ArticleDOI
01 Jan 1969
TL;DR: A very flexible computer aided design system has been developed which provides highly accurate custom MOS complex array designs in reasonably short turnaround-time with a minimum of design errors.
Abstract: A design system employing computer aided design techniques, a Gerber digital photographic plotter, and an automatic LSI tester has been developed and used in logic design, layout design, mask generation, and testing, of complex MOS Large Scale Integrated circuit arrays. The system employs computer logic simulation for debugging machine logic and generating test tapes, and utilizes abbreviated input data techniques for generating array layout designs and photographic artwork masters. In this system a major portion of the creative array design work is performed manually and detailed design and analysis is performed by the computer. In the design of the computer process, major emphasis was placed on detecting design errors and violations of design rules. As a result of this approach a very flexible computer aided design system has been developed which provides highly accurate custom MOS complex array designs in reasonably short turnaround-time with a minimum of design errors. The system is designed so that more automation features, that will perform additional creative design steps, may be incorporated as they are developed. Due to its modularity, modifications which will take advantage of advanced circuits, advanced fabrication processes, and second source vendors may be carried out at appropriate intervals with minimum system development and reprogramming.


Journal ArticleDOI
TL;DR: This paper describes some of the techniques by which linear circuit design using c-a.d. techniques may be achieved using analysis programs to calculate the noise performance and distortion products of a circuit.
Abstract: In the past linear circuit design using c-a.d. techniques has suffered from the lack of programs to calculate the noise performance and distortion products of a circuit. The main difficulty in using analysis programs in the design cycle is the time taken in getting the problem to and from the computer. As the computer takes over a bigger proportion of design this problem will to some extent be reduced and a computer run will achieve more. This paper describes some of the techniques by which this may be achieved.


Journal ArticleDOI
TL;DR: Correlation units are intended as flexible building blocks of decision electronics in multicounter experiments and the design and performance of a 4-variable module are reported.