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IEEE Transactions on Circuit Theory

Issue 6 • Date November 1973

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Displaying Results 1 - 21 of 21
  • Editorial

    Publication Year: 1973, Page(s):625 - 627
    Cited by:  Papers (2)
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    Freely Available from IEEE
  • On-line transistor modeling in a manufacturing environment

    Publication Year: 1973, Page(s):683 - 687
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (569 KB)

    A transistor modeling program which is designed to operate in a minicomputer in real time has been developed for use in a manufacturing environment. The program resides in a PDP-15 associated with a computer-operated measurement set. The program is designed to aid in the manufacture and characterization of a particular type of high-frequency power transistor which is to be used in an amplifier whe... View full abstract»

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  • A unified approach to the design of optimum FIR linear-phase digital filters

    Publication Year: 1973, Page(s):697 - 701
    Cited by:  Papers (121)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    A method for designing finite-duration impulse-response (FIR) linear-phase digital filters is presented in which the four possible cases for such filters are treated in a unified approach. It is shown how to reduce each case to the proper form so that the Remez exchange algorithm can be used to compute the best approximation to the desired frequency response. The result is that a very flexible and... View full abstract»

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  • Hybrid sparse-matrix methods

    Publication Year: 1973, Page(s):641 - 649
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1128 KB)

    In computer-aided design for large systems, the efficient solution of large sparse systems of linear equations is important. We critically examine two parts of the solution of sparse systems of linear equations: ordering and the factorization of the ordered matrix. After examining several candidates from a theoretical point of view, as well as with examples, we conclude that the Markowitz ordering... View full abstract»

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  • Network statistics for computer-aided network analysis

    Publication Year: 1973, Page(s):635 - 641
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    Comparative studies of computer-aided network analysis (CANA) program performance have been handicapped by a lack of statistics about networks. This paper derives bounds and presents empirical values for: 1) the number of elements per node; 2) the sparsity of the cutset matrix; 3) the density of nonlinear nodes; 4) the relative percentage of excess capacitors and inductors; and 5) the relationship... View full abstract»

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  • Distortion analysis of bipolar transistor circuits

    Publication Year: 1973, Page(s):709 - 716
    Cited by:  Papers (28)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    In the design of long-haul analog communication systems, it is essential to understand the nonlinear distortion behavior of the electronic circuit realization. Distortion analysis of weakly nonlinear circuits has been developed based on the well-known perturbation method. In the frequency domain, the nonlinearities of a transistor are shown to be equivalently represented by intermodulation distort... View full abstract»

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  • Algorithms for ASTAP--A network-analysis program

    Publication Year: 1973, Page(s):628 - 634
    Cited by:  Papers (154)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    The advanced statistical analysis program (ASTAP) is a general-purpose network-analysis program which performs nonlinear transient, dc, and ac analyses and provides statistical simulation to determine the distribution of circuit outputs due to parameter variations. The program combines a user-oriented input language capable of describing completely general nonlinear devices with the latest advance... View full abstract»

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  • A method for the computation of large tolerance effects

    Publication Year: 1973, Page(s):704 - 708
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    A method is described for the tolerance analysis of linear circuits with large element variations. It utilizes the adjoint network concept to set up a reduced system of equations, solvable by either Gaussian elimination or iteration. The process appears to be considerably more economical than simple repeated analysis of the circuit, provided that not all circuit elements are toleranced. View full abstract»

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  • Subthreshold characteristics of insulated-gate field-effect transistors

    Publication Year: 1973, Page(s):659 - 665
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    A simple analytical model is developed for the subthreshold region of insulated-gate field-effect transistors (IGFET). For short channels, it is necessary to extend the model to include two-dimensional band-bending effects at the source in order to describe correctly the reduction in threshold caused by high drain and substrate voltages. The model is experimentally verified over a wide range of bi... View full abstract»

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  • Design of distributed amplifiers with the aid of a computer

    Publication Year: 1973, Page(s):702 - 703
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    The design of transistorized distributed amplifiers (DA's) that takes into account line losses is considered. The design approach is based on the concept of interior matching and computer-aided optimization of responses. An actual design example is given. View full abstract»

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  • A survey of applications of symbolic network functions

    Publication Year: 1973, Page(s):732 - 737
    Cited by:  Papers (51)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (768 KB)

    A survey of applications of symbolic network functions is presented in which some network elements, in addition to the complex frequency s , are represented by variables. The concept of "closed systems" is generalized. A fundamental theorem on the form of symbolic network functions is proved. View full abstract»

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  • Fabrication-based optimization of linear integrated circuits

    Publication Year: 1973, Page(s):690 - 697
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (800 KB)

    This paper demonstrates how optimization methods that were originally derived for the design of networks comprised of ideal elements can profitably be used to realize practical designs of linear integrated-circuit amplifiers. Of fundamental importance is the establishment of a set of designable parameters which are consistent in terms of the relationship between the processing steps, i.e., the dif... View full abstract»

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  • MOS-device modeling for computer implementation

    Publication Year: 1973, Page(s):649 - 658
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    Generalized MOS-device and circuit modeling problems are discussed. Guidelines for comparing MOS-device models, for selecting phenomena to be modeled, for acquiring model parameters, and for implementing the model are established. A voltage variable capacitance subroutine within a four-terminal Q_B field-dependent model is recommended. The importance of accu... View full abstract»

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  • Computer-aided topological design for integrated circuits

    Publication Year: 1973, Page(s):717 - 725
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (968 KB)

    Component placement and wire routing are looked at as a coupled surface layering problem on two planes. This problem is transformed into a graph theoretic synthesis problem by neglecting the lateral dimensions of components and wiring. A solution is given by programmable algorithms. View full abstract»

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  • Threshold voltage from numerical solution of the two-dimensional MOS transistor

    Publication Year: 1973, Page(s):666 - 673
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    The MOST model of Pao and Sah is extended to take into account the two-dimensional nature of the electrostatic potential. By keepig the current one dimensional, the basic equations can be cast into a form suitable for Gummel's iterative scheme. The numerical model is based on a finite-difference approximation to Poisson's equation and a closed-form expression for the current flow. The model is ver... View full abstract»

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  • Symbolic analysis for computer-aided circuit design-The interpolative approach

    Publication Year: 1973, Page(s):738 - 741
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    Symbolic analysis using direct matrix and interpolationformula methods are discussed. The techniques accommodate passive networks and active networks containing general frequency-dependent devices, themselves represented by rational-function matrices. Subsequently, this leads to the development of partitioned analysis. The suppression of numeric common factors and the determination of the order of... View full abstract»

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  • Calculation of the capacitance coefficients of planar conductors on a dielectric surface

    Publication Year: 1973, Page(s):725 - 731
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (712 KB)

    A program for evaluation of parasitic capacitances of thinfilm conductors deposited on a dielectric substrate is described. The conductors can be of an arbitrary manhattan-type geometry and can be deposited on either side of the substrate. The dielectric substrate may have a metal backing. All the mutual and self-capacitances are computed. The method is inherently more accurate and faster than exi... View full abstract»

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  • A note on the computation of large-change sensitivities

    Publication Year: 1973, Page(s):741 - 742
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    A method of efficiently computing large-change sensitivities is described. The approach is more general than an existing method in that it is directly applicable to several network functions. View full abstract»

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  • Applications of Golub's algorithm in circuit optimization and analysis

    Publication Year: 1973, Page(s):687 - 690
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    The recently developed algorithm of Golub for solving an overdetermined system of linear equations is applied to the least pth optimization of circuits and to the nodal and mesh analysis of passive resistive networks. The results show that Golub's technique is well suited for the solution of such problems, even in the presence of severe ill conditioning. View full abstract»

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  • Efficient computer simulation of distortion in electronic circuits

    Publication Year: 1973, Page(s):742 - 745
    Cited by:  Papers (16)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    A general-purpose electronic-circuit simulation program is employed to efficiently compute second- and third-order distortion due to weak nonlinearities in bipolar junction transistor (BJT) circuits of arbitrary complexity. The method is based on the Volterra-series representation of the electronic circuit and is valid at all frequencies. The transistors are represented by a simple modified Ebers-... View full abstract»

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  • Designer-oriented CAD

    Publication Year: 1973, Page(s):673 - 682
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1136 KB)

    The philosophy and features of the designer-oriented computer-aided design (CAD) are presented and discussed from both the economic and technical standpoint. Dedication of the CAD system is proposed for efficient design with the minicomputer being the economical choice. Some novel techniques suitable for minicomputers are proposed and a CAD system tailored for designer-oriented operation is descri... View full abstract»

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