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CreatorTitleDescriptionSubjectDate
51 Stevens, KennethAutomatic synthesis of fast, compact self-timed controlAn automated synthesis tool, called the Most Excellent Asynchronous Tool, or MEAT is presented. This tool has been used to specify and synthesize self-timed circuits for a fully self-timed 300,000 transistor communication co-processor. The Specification is done with stylized state diagrams. This is ...1992
52 Normann, Richard A.; Johansson,Torbjorn; Abbasi, Masoud; Huber, Robert J.Three-dimensional architecture for a parallel processing photosensing arrayA three-dimensional architecture for a photosensing array has been developed. This silicon based architecture consists of a 10 x 10 array of photosensors with 80 microns diameter, through chip interconnects to the back side of a 500 microns thick silicon wafer. Each photosensor consists of a 300 x 3...Retina; Optics; Silicon; Photosensing1992
53 Stringfellow, Gerald B.Long wavelength lattice dynamics for quaternary alloys: GaInPSb and AlGaAsSbPresents information on a study which investigated the long wavelength lattice dynamics of quaternary alloys. Theory of the random cell isodisplacement model; Secular equation developed; Results and discussion.Lattice dynamics; Quaternary alloys1992
54 Mathews, V. JohnAn efficient algorithm for joint estimation of differential time delays and frequency offsetsABSTRACT This paper introduces an efficient algorithm that jointly estimates differential time delays and frequency offsets between two signals. The approach is a two-step procedure. First, the differential frequency offsets are estimated from measurement of the autocorrelation functions of the rec...1992
55 Mathews, V. JohnQR-decomposition based algorithms for adaptive volterra filteringAbstract - In this paper we present a pair of QR-RLS adaptive algorithms for second-order Volterra filtering. The algorithms are based solely on Given's rotations. Hence both the algorithms are numerically stable and highly amenable to parallel implementations. The computational complexity of one of...1992
56 Mathews, V. JohnMultiplication free vector quantization using the L 1 distortion measure and its variantsVector quantization is a very powerful technique for data compression and consequently, it has attracted a lot for attention lately. One major drawback associated with this approach is its extreme computational complexity. This paper fist considers vector quantization that uses the L1 distortion mea...1992
57 Myers, Chris J.Direct synthesis of timed asynchronous circuitsThis paper presents a new method to synthesize timed asynchronous circuits directly from the specification without generating a state graph. Our synthesis procedure begins with a deterministic signal transition graph specification to which timing constraints can be added. First, a timing analysis ex...1992
58 Normann, Richard A.; Abbasi, Masoud; Johansson,TorbjornSilicon carbide enhanced thermomigrationThe widespread acceptance of thermomigration technology to produce through-chip interconnects has been impaired by (i) a random walk of the Si-Al liquid eutectic inclusion as it traverses the wafer, and (ii) a ?surface barrier? which allows thermomigration of only relatively large inclusions. In ...Silicon Dioxide; Thermometers; Transducers; Thermomigration Technology; Infrared Lamps1992
59 Mathews, V. JohnVector quantization of images using visual masking functionsABSTRACT This paper presents an image compression technique that incorporates visual masking functions in vector quantizer systems. Visual masking functions provide a description of the maximum amount of noise that can be present in an image, while remaining undetected when the image is viewed by ...1992
60 Mathews, V. JohnSubband vector quantization of images using hexagonal filter banksAbstract Results of psychophysical experiments on human vision conducted in the last three decades indicate that the eye performs a multichannel decomposition of the incident images. This paper presents a subband vector quantization algorithm that employs hexagonal filter banks. The hexagonal filte...1992
61 Stringfellow, Gerald B.Effect of oxygen incorporation in semi-insulating (AlxGa1-x)yIn1-yPDiscusses a study conducted on oxygen-doped, semi-insulating layers of (aluminum-gallium) indium phosphide grown on gallium arsenide using organometallic vapor phase epitaxy. Effect of oxygen doping on semi-insulating layers of the substance; Secondary-ion mass spectrometry measurements; Measured co...Inactive interstitial atoms; Energy-dispersive spectoscopy; intentional oxygen1992
62 Stringfellow, Gerald B.Tertiarybutyldimethylantimony: a new Sb source for low temperature organometallic vapor phase epitaxial growth of InSbThis article investigates tertiarybutyldimethylantimony as a source for low-temperature organometallic vapor phase epitaxial growth of indium antimonide (InSB); extraction of good surface morphology InSb layers; efficiency of InSB growth; and, presence of a negligible parasitic reaction between trim...Tertiarybutyldimethylantimony; Indium antimonide crystals1992
63 Mathews, V. JohnAdaptive lattice bilinear filtersAbstract-This paper presents two fast least squares lattice algorithms for adaptive nonlinear filters equipped with bilinear system models. Bilinear models are attractive for adaptive filtering applications because they can approximate a large class of nonlinear systems adequately, and usually with...1993
64 Stevens, KennethTesting the consequences of specifications in modal µIn a companion paper in these proceedings [6], we introduced the CCS notation and explained how to write specifications succinctly in CCS using the composition operator. In this paper we explain how one may associate a process logic with CCS and use it to resolve deadlock, safety, liveness, and fai...1993
65 Stevens, KennethThe post office experience: designing a large asynchronous chipThe Post Office is an asynchronous, 300,000 transistor, full-custom CMOS chip designed as the communication component for the Mayfly scalable parallel processor. Performance requirements led to the development of a design style which permits the design of sequential circuits operating under a rest...1993
66 Mathews, V. JohnVolterra and general polynomial related filteringThis paper presents a review of polynomial filtering and, in particular, of tlie truncated Volterra filters. Following the introduction of the general properties of such filters, issues such as eficieiit realizations, design, adaptive algoritlims and stability are discussed.1993
67 Mathews, V. JohnA stochastic gradient adaptive filter with gradient adaptive step sizeAbstract-This paper presents an adaptive step-size gradient adaptive filter. The step size of the adaptive filter is changed according to a gradient descent algorithm designed to reduce the squared estimation error during each iteration. An approximate analysis of the performance of the adaptive fil...1993
68 Myers, Chris J.Synthesis of timed asynchronous circuitsIn this paper we present a systematic procedure to synthesize timed asynchronous circuits using timing constraints dictated by system integration, thereby facilitating natural interaction between synchronous and asynchronous circuits. In addition, our timed circuits also tend to be more &dent, in b...1993
69 Myers, Chris J.Synthesis of timed asynchronous circuitsAbstract-In this paper we present a systematic procedure to synthesize timed asynchronous circuits using timing constraints dictated by system integration, thereby facilitating natural interaction between synchronous and asynchronous circuits. In addition, our timed circuits also tend to be more & d...1993
70 Mathews, V. JohnAdaptive phase transform processors for time delay estimationThis paper introduces two recursive realizations of the phase transform (PHAT) processor for time-delay estimation (TDE), using a simple one-pole low-pass filter and the least-mean-square (LMS) adaptive filter, respectively. It is shown that these adaptive methods are capable of tracking time-varyin...1993
71 Mathews, V. JohnQR-decomposition based algorithms for adaptive volterra filteringA QR-RLS adaptive algorithm for nonlinear filtering in presented. The algorithm is based solely on Givens rotation. Hence the algorithm is numerically stable and highly amenable to parallel implementations. The computational complexity of the algorithm is comparable to that of the fast transversal V...1993
72 Mathews, V. JohnTechniques for bilinear time series analysisThis paper reviews the general problem of nonlinear time series analysis. The special case of bilinear time series analysis is discussed in detail. The stability of the estimated nonlinear system models is of particular importance. We discuss a simple sufficient condition for the stability of s...1993
73 Stevens, KennethDesigning parallel specifications in CCSWe describe a style of specifying concurrent systems based upon the parallel composition operatorof CCS and apply it to several asynchronous hardware examples.1993
74 Stevens, Kenneth; Davis, Alan L.Automatic synthesis of fast compact self-timed control circuitsWe present a tool called MEAT which has been designed to automatically synthesize transistor level. CMOS, self-timed control circuits. MEAT has been used to specify and synthesize self-timed circuits for a fully self-timed 300,000 transistor communication coprocessor. The design is specified using f...1993
75 Mathews, V. JohnFast recursive least squares adaptive second-order volterra filter and its performance analysisAbstract-This paper presents a fast, recursive least squares (RLS) adaptive nonlinear filter. The nonlinearity is modeled using a second-order Volterra series expansion. The structure presented in the paper makes use of the ideas of fast RLS multichannel filters and has a computational complexity of...1993
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