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Circuits and Systems, 2000. Proceedings of the 43rd IEEE Midwest Symposium on

Date 8-11 Aug. 2000

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  • Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems [front matter]

    Publication Year: 2000, Page(s):i - xlix
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  • Topical index

    Publication Year: 2000, Page(s): A
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  • Author index

    Publication Year: 2000, Page(s):B - H
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  • Real-time implementation of image encoding for DVR systems using TMS320C6201

    Publication Year: 2000, Page(s):1104 - 1107 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Implemented real-time image encoder for digital video recording (DVR) system. TMS320C6201 DSP is used for image compression. The algorithm is based on JPEG and motion detection is added to remove temporal data redundancy. Fast algorithms and real-time techniques are used for optimization. We improve encoding speed with proper distribution of memories that have different speeds. The separation of d... View full abstract»

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  • Optimized delay characteristics for a hearing instrument filter bank

    Publication Year: 2000, Page(s):1074 - 1077 vol.3
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    An efficient implementation of a digital filter bank has been developed for use in a hearing instrument by employing interpolated complementary linear phase FIR filters. The proposed architecture involves optimizing the delay characteristics of the individual passbands so as to realize an improved overall maximally flat frequency response for the filter bank View full abstract»

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  • A POCS-based algorithm to attack image watermarks embedded in DFT amplitudes

    Publication Year: 2000, Page(s):1100 - 1103 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (424 KB)

    During recent years, digital watermarking has drawn a lot of attention as a means to protect the copyright of image data. Numerous algorithms have been proposed in different domains. Particularly, a set of these algorithms embed the watermark information in the amplitudes of the discrete Fourier transform (DFT) coefficients. However, studies have shown that the image can be reconstructed by using ... View full abstract»

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  • A micro-power precision switched-capacitor charge meter system for implantable medical devices

    Publication Year: 2000, Page(s):1068 - 1072 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    Estimating the remaining capacity of the battery for implantable medical devices such as pacemakers, defibrillators, and neuro-stimulators is critical information. This paper presents a precision system, which can be a part of an integrated circuit of an implantable medical device, to monitor the charge depletion. The system consists of a sensing resistor, a precision voltage controlled oscillator... View full abstract»

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  • A novel approach for a non-invasive diagnostic technique for thyroid glands using thermographic system

    Publication Year: 2000, Page(s):1094 - 1097 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    A computer based prototype device was designed based on an economical noninvasive system that could detect and display, the relative skin temperature variations present in human patients suffering from thyroid disorders. Such a system could be used to augment the normal procedures followed by the physician in diagnosing the thyroid to detect areas of hyperactivity within the gland. Because a hyper... View full abstract»

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  • Finite element analysis for simulating a hot thyroid nodule

    Publication Year: 2000, Page(s):1064 - 1067 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Presents the theory supporting a new diagnostic method for a thermographic system. A finite element analysis of a hot thyroid nodule is developed and used for diagnosis utilizing thermal imaging. The new non-invasive diagnostic technique was applied to patients having Graves' diseases at the Indiana University (IU) Hospital, and compared with the existing scheme that utilizes I Scan. The results o... View full abstract»

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  • Synthesis of a reactance network having the step response close to a rectangular shape pulse

    Publication Year: 2000, Page(s):1388 - 1391 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    Describes synthesis of a network to have the step response close to a rectangular shape pulse. The derivative of this step response is described by positive and delayed negative semi-periods of sine-squared function. The real and imaginary parts of the Laplace transform of this derivative are expanded in infinite products. Then, using a finite amount of terms in these products one can obtain the t... View full abstract»

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  • Gain-controlled resistors in analysis of amplifiers featuring accurate input and output impedance

    Publication Year: 2000, Page(s):1232 - 1235 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    An amplifier featuring accurate input and output impedance can be considered as a device that includes two models of gain controlled resistors. The models are introduced, and it is shown how they can be used in the analysis and design of such an amplifier. Then the analysis is applied to two-transistor amplifiers used in practice, and a new configuration is added. The relationship that should exis... View full abstract»

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  • A digitally implementable ear-type lattice

    Publication Year: 2000, Page(s):1090 - 1093 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The internal auditory system emits slightly detectable sounds (Kemp echoes) as a response to the auditory input. This response is able to be mimicked via a cascade of two-port lattices and has been previously simulated with analog amplifiers. This paper presents a digital implementation scheme using fixed-point, two's complement arithmetic with the wordlength and decimal precision based on generic... View full abstract»

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  • Comparison of basic operational amplifier models

    Publication Year: 2000, Page(s):1014 - 1017 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    A comparison of two simple models for operational amplifiers is undertaken in this paper. One model is termed the one-pole rolloff model, and this model has been used with good results for several decades. The other model has been utilized from time-to-time in recent years. Three criteria are stated for a "good" model, and it is shown that one of the models fails to meet one of the criteria View full abstract»

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  • A continuously-adapting analog node using floating-gate synapses

    Publication Year: 2000, Page(s):1058 - 1061 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    Demonstrates that a network of pFET single-transistor learning synapses implements a multi-input adaptive node. These floating-gate synapses are capable of four-quadrant multiplications between an input and a weight, as well as adapting to a four-quadrant correlation between the input and a learning signal applied as a drain voltage. Our adaptive floating-gate node structure converges to the corre... View full abstract»

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  • Enhancing transient stability using a fuzzy control scheme for the unified power flow controller (UPFC)

    Publication Year: 2000, Page(s):1382 - 1385 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    This paper proposes a power system oscillation damping scheme via a supplementary signal applied to a Unified Power Flow Controller (UPFC). The supplementary signal is based on the active power flow along the transmission line. The controller designed is based on fuzzy logic. The UPFC model and its controls are implemented in the Power System Toolbox (PST). To demonstrate the effectiveness of the ... View full abstract»

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  • Charge-based CMOS FIR adaptive filter

    Publication Year: 2000, Page(s):1410 - 1413 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    A low-power, high-density CMOS design for an LMS adaptive FIR filter is presented. A combination of charge-based and subthreshold MOS circuits is used for filtering and adaptation. Accurate analog linear filtering is achieved through pulse-width modulation of input signal. A wide dynamic range is obtained by biasing the MOS switched current sources in the subthreshold regime, with the filter coeff... View full abstract»

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  • Finding phase margin of feedback systems from closed loop AC simulations

    Publication Year: 2000, Page(s):1228 - 1231 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    The stability of a feedback system is generally characterized with a point variable, the system phase margin. Phase Margin is a function of the system loop gain and is not always well defined. In this paper we show how to obtain the phase margin from the closed loop system response by translating the phase of this function with a simple algebraic relation. As the method utilizes a closed loop resu... View full abstract»

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  • Current mode standard lattice filter for use in complex ear-type networks

    Publication Year: 2000, Page(s):1086 - 1089 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    An inner ear degree-two cochlea section, which encompasses complex transmission zeros, is realized completely in hardware. In doing this, standard complex two port filters are extracted to a real four port network. A new digital switched current circuit is used with improved clock feed through delay portions. A complex lattice portion is simulated in both Spice and Matlab with accurate results View full abstract»

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  • Evolution of a folded floating-gate differential pair

    Publication Year: 2000, Page(s):1052 - 1056 vol.3
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    The author presents a folded floating-gate MOS (FGMOS) differential pair circuit that is capable of simultaneously providing a rail-to-rail common-mode input voltage range and a rail-to-rail output voltage swing with a low power-supply voltage. In this configuration, the voltage drop across the bias current source is folded up into the same range over which the output voltages swing, facilitating ... View full abstract»

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  • 1-D and 2-D real-valued discrete Gabor transforms

    Publication Year: 2000, Page(s):1182 - 1185 vol.3
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    By replacing the complex-valued Gabor basis functions of the complex-valued discrete Gabor transform (CDGT) with real-valued Gabor basis functions, we propose a real-valued discrete Gabor transform (RDGT) for finite discrete signal and image representations. The RDGT provides a simpler method than the CDGT to calculate the transform (or Gabor) coefficients from finite summations and to reconstruct... View full abstract»

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  • Optimal interpolator using a trigonometric polynomial

    Publication Year: 2000, Page(s):1206 - 1209 vol.3
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    All-digital approaches for the adjustment of timing offset in digital modems have attracted increasing attention. We recently announced a novel interpolation method which, instead of approximating the continuous-time signal with a conventional polynomial and computing the synchronized samples using a Farrow structure, uses a trigonometric polynomial. Simulation results indicate that improved perfo... View full abstract»

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  • Development of a real time chat application on intelligent network based on fuzzy logic

    Publication Year: 2000, Page(s):1376 - 1380 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    This paper describes the implementation of an intelligent chat group based on fuzzy logic. The chat group is based on client server model. The expert system based on fuzzy logic is developed in Java and monitors parameters, like number of clients, the idle time of each client etc., and then determines the priority of each client View full abstract»

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  • A 1-V 5 μW CMOS-opamp with bulk-driven input transistors

    Publication Year: 2000, Page(s):1038 - 1041 vol.3
    Cited by:  Papers (17)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB)

    In this paper, a low-power CMOS operational amplifier for biomedical instrumentation operating with a 1-V supply is described. Large input common-mode range (CMR) is achieved utilizing bulk-driven PMOS-transistors as an input differential pair of the opamp. The opamp was fabricated in a 0.35 μm n-well double-poly CMOS process with threshold voltages of 0.5 V and 0.65 V. The open-loop gain (A View full abstract»

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  • Implementation of RNS analysis and synthesis filter banks for the orthogonal discrete wavelet transform over FPL devices

    Publication Year: 2000, Page(s):1170 - 1173 vol.3
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB)

    RNS architectures to compute the orthogonal DWT and its inverse are shown. The relation between the coefficients of the analysis and synthesis filters allows one to halve the number of required LUTs and modular adders. Simulations of one- and two- octave implementations using VHDL and FPL devices show a performance advantage of up to 23.45 and 96.58% when compared to the 2's complement arithmetic ... View full abstract»

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  • Programmable convolution array (PCA) chip for arbitrary image transforms on the sensory plane

    Publication Year: 2000, Page(s):1120 - 1123 vol.3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    A programmable convolution array (PCA) architecture is described. The architecture uses CMOS light sensors, each connected to an amplifier. The aggregate of amplifiers yields a sum of products and computes convolution of the image with kernels of arbitrary size. A chip based on this architecture and test results are presented View full abstract»

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