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Circuits and Systems, 1992., Proceedings of the 35th Midwest Symposium on

Date 9-12 Aug. 1992

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  • Proceedings of the 35th Midwest Symposium on Circuits and Systems (Cat. No.92CH3099-9)

    Publication Year: 1992
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    Freely Available from IEEE
  • A fully monolithic broadband power amplifier for Ku-band communications satellite applications

    Publication Year: 1992, Page(s):1020 - 1023 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB)

    An attempt was made to demonstrate a fully monolithic SSPA module for application to Ku-band direct-radiating array antennas. The module design approach incorporates the necessary tradeoffs to simultaneously achieve good performance in efficiency and linearity, in addition to meeting the necessary gain and output power requirements over the full 10.7- to 12.75-GHz band. The authors descri... View full abstract»

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  • A simple approach to observer path design for bearings-only tracking

    Publication Year: 1992, Page(s):1147 - 1150 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    The problem of designing an optimal observer path for bearings-only target motion analysis is of continuing research interest due to the nonlinear nature of the tracking problem. The objective of the study is to show via simulation that the cumulative information content index (CICI), which is the sum of the determinants of the Fisher information matrices over time, can be an effective index in de... View full abstract»

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  • An analog macromodel of the SG1525A PWM for use with SPICE 2G.6 simulators

    Publication Year: 1992, Page(s):1546 - 1551 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    An analog macromodel for the SG1525A PWM (pulse width modulator) has been developed that is compatible with SPICE2G.6 and PSPICE version 5.1 analog simulators. The SG1525A PWM integrated circuit is a sophisticated design which provides accurate performance while lowering the external parts count when used to implement all types of switching power supplies. The analog macromodel exhibits no converg... View full abstract»

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  • Fractals: classification, generation and applications

    Publication Year: 1992, Page(s):1024 - 1027 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    An overview of the types of fractals, their generating methods, and their applications is given. Fractals come in two major variations, deterministic fractals and random fractals. The first category consists of those fractals that are composed of several scaled down and related copies of itself, such as the Koch curve. They are called geometric fractals. The Julia set also falls into the same cate... View full abstract»

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  • Observer-based controller design for nonstandard singularly perturbed sampled data systems

    Publication Year: 1992, Page(s):1151 - 1153 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    A linear shift-invariant singularly perturbed sampled-data system is considered with the assumption that not all states are available for measurement, and therefore the design is in the form of an observer-based controller. Given the two-time-scale property of the system, singular perturbation theory may be used to design lower-order feedback controllers for the slow and fast subsystems. It is ass... View full abstract»

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  • Modeling real time applications in distributed environment

    Publication Year: 1992, Page(s):1581 - 1584 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Real-time interactive group communication using voice media is discussed. The authors developed a distributed audio conferencing system on top of a conventional system-design support platform that included Sun SparcStations, Unix, IP protocol, and Ethernet. In the study, Petri nets have proved to be an excellent modeling tool for designing such a workstation-based real-time voice conferencing syst... View full abstract»

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  • A SPICE macromodel for a CA3085 adjustable voltage regulator

    Publication Year: 1992, Page(s):1552 - 1555 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    A macromodel for a CA3085 regulator is presented. The CA3085 is an 8-pin, adjustable, positive voltage regulator. Design formulas are presented. The room temperature model is presented first. Then this model is adapted to produce a model to predict results at -55°C and 125°C. Finally, a comparison with laboratory results is presented View full abstract»

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  • A cost-effective bus-based multiprocessor system

    Publication Year: 1992, Page(s):1028 - 1031 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    The authors present a new bus structure called the generalized bus interconnection. In this bus structure all the processors and memory modules are partitioned into a number of processor and memory groups. A processor group is connected to each memory group by a set of multiple buses. For a fixed number of buses, this new bus structure can support more processors than the conventional bus structur... View full abstract»

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  • Program granularity and performance in multiprocessor systems

    Publication Year: 1992, Page(s):324 - 327 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    Performance in multiprocessor systems depends on various factors. Granularity of the program exerts a surprising effect on the performance. This relationship is investigated theoretically and experimentally for a transputer system of up to 24 slave modules. The results show a strong dependency of performance on particular values of processor number, granularity, and number of tasks to be computed View full abstract»

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  • The folded Gilbert cell: a low voltage high performance CMOS multiplier

    Publication Year: 1992, Page(s):20 - 23 vol.1
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    Three linearity-improved implementations of a Gilbert cell in CMOS technology are presented. They have low voltage supply requirements and wide input signal ranges on both inputs. Experimental results of a CMOS test chip are presented. The utilization of the cell as a very wide tuning range linear transconductor is discussed View full abstract»

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  • A switched-capacitor realization of discrete-time block filters

    Publication Year: 1992, Page(s):429 - 432 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The application of parallel form block discrete time filters is demonstrated for switched capacitor analog circuit technology. An example circuit design is given for a fourth order elliptic filter implemented with a factor of L=d4 speed-up over conventional circuits. Special circuitry to implement a one-to-L serial-to-parallel input sampler and an L-to-1 parallel-to-seri... View full abstract»

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  • Dynamic performance simulation of a flash converter

    Publication Year: 1992, Page(s):1450 - 1453 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Simulation of the dynamic performance of a flash analog-to-digital (A/D) converter is complicated due to the presence of many systematic and random dynamic errors. A simulation methodology is proposed where all of the dynamic errors in the converter are lumped into an effective timing uncertainty of the sampling clock. The effective timing uncertainty is a function of the signal dynamics, and comp... View full abstract»

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  • Computer simulation and design of nonlinear microstrip 14.25 GHz amplifier

    Publication Year: 1992, Page(s):639 - 642 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    The complete computer-aided design and analysis of a 14.25-GHz nonlinear microstrip amplifier are given. The response of the circuit is predicted in the time and frequency domains using an existing general program. A practical microstrip circuit of the nonlinear amplifier was built and measured. A comparison between experimental and simulated results indicates very good agreement View full abstract»

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  • Model matching using reduced-order dynamic compensator

    Publication Year: 1992, Page(s):1154 - 1156 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    A control design method is presented for model matching and stability robustness of a linear discrete-time system. The design algorithm uses a stability robustness component in addition to the matching error. The controller structure is initially specified as a reduced-order dynamic compensator. From the example, it is clear that the proposed robust state feedback design gives a large bound and la... View full abstract»

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  • Design, fabrication, and testing of a 12-bit sigma-delta analog to digital converter

    Publication Year: 1992, Page(s):1201 - 1204 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    A 12-b sigma-delta (Σ-Δ) analog-to-digital (A/D) converter has been designed and fabricated using a 2-μm CMOS double-poly process. The chip is part of a study in the design of mixed analog-digital circuits. A second-order Σ-Δ modulator using 1 b quantization and a subsequent moving average digital filter using no multiplies have been realized. Simulations were run to det... View full abstract»

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  • Temperature tracking SPICE macro-model for laser and LED driven opto-coupler assemblies

    Publication Year: 1992, Page(s):1556 - 1559 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    Temperature tracking models for opto-coupler assemblies constructed from discrete components were developed. These opto-couplers used a photon source consisting of either a laser diode or a light emitting diode (LED) coupled to an AlGaAs photodiode through a lens. These assemblies are different from most of their integrated circuit counterparts because a photodiode is used for a detector rather th... View full abstract»

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  • Using PSPICE to determine the relative stability of RC active filters

    Publication Year: 1992, Page(s):1102 - 1105 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    The authors describe a simple procedure for using PSPICE to calculate the relative stability of an active circuit. The active circuit can be implemented using a variety of active devices, including op amps, current conveyors, transimpedance amplifiers, and operational transconductance amplifiers. This procedure can be used with the PSPICE macromodels provided by amplifier manufacturers. This proce... View full abstract»

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  • Interconnection minimization in multiport memories based data path synthesis

    Publication Year: 1992, Page(s):1032 - 1035 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The authors present an efficient technique for minimization of interconnect in multiport memory based data path synthesis for application-specific designs. The minimization problem has been formulated as a 0-1 integer linear programming problem. A 0-1 integer linear programming model is presented which performs functional unit and connection allocation tasks simultaneously assuming that registers ... View full abstract»

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  • A VLSI architecture for automatic speech recognition on large vocabularies

    Publication Year: 1992, Page(s):540 - 543 vol.1
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The VLSI architecture of a coprocessor for automatic speech recognition is presented. The processor is capable of executing the most computationally intensive task in speech recognition, the Viterbi-search for word- and sentence-hypotheses, in real-time. This is achieved by a specialized arithmetic unit (AU) and an application specific memory architecture. The arithmetic core attains a clock frequ... View full abstract»

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  • VIRGO: hierarchical DSP code generator based on vectorized signal flow graph description

    Publication Year: 1992, Page(s):328 - 331 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    A hierarchical digital signal processor (DSP) code generator, VIRGO, for large-scale general signal processing algorithms is proposed. Hierarchical structured vectorized signal flow graph (V-SFG) description is used as input specification. The DSP independent optimization procedure for both the program size and the execution time is performed, module by module, hierarchically with regard to operat... View full abstract»

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  • A novel design for a multipurpose residue-to-mixed-radix decoder

    Publication Year: 1992, Page(s):24 - 27 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    An algorithm to determine the mixed-radix digits for the moduli set {2n-1, 2n+1} is proposed. This algorithm is exploited in implementing a sign detector, a magnitude comparator, a scaler and a residue-to-binary converter. All presented implementations are memoryless. They utilize binary adders and combinational logic View full abstract»

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  • High speed low connectivity (HSLC) counter [using cellular automata concept]

    Publication Year: 1992, Page(s):433 - 436 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    A new type of nonbinary counter that represents one step toward overcoming the shortcomings of circuit complexity and interconnection delays is introduced. The counter is known as a high speed low connectivity (HSLC) counter. Its architecture employs a cellular logic design concept with judiciously chosen local logical rules for interconnecting its building modules. The realizability of such count... View full abstract»

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  • Comparative study of the transversal filter with conventional DFT processing in a nonlinear radar receiver

    Publication Year: 1992, Page(s):1454 - 1457 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    The degrees to which clutter plus noise is canceled by the classical radar receiver using a discrete Fourier transform (DFT) and by the adaptive radar receiver based on a transversal filter are compared. Both linear and nonlinear behavior of the receivers are considered. Rectangular triangular, and Hanning windows are applied to the data as part of the DFT processing View full abstract»

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  • Analysis and design of broadside and overlap microstrip line couplers by finite element method

    Publication Year: 1992, Page(s):647 - 650 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    The general configuration of coupled microstrip lines on different dielectric interfaces is analyzed, and their design parameters are derived in terms of the system capacitances which are computed by using the finite element method. Design curves are calculated for edge coupled lines, broadside coupled lines and overlap coupled lines. The computed results are compared whenever possible with the av... View full abstract»

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