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About: Waveform is a(n) research topic. Over the lifetime, 64255 publication(s) have been published within this topic receiving 538069 citation(s). more


Journal ArticleDOI: 10.1109/JRPROC.1962.288235
J. Nagumo1, S. Arimoto1, S. Yoshizawa1Institutions (1)
01 Oct 1962-
Abstract: To electronically simulate an animal nerve axon, the authors made an active pulse transmission line using tunnel diodes. The equation of propagation for this line is the same as that for a simplified model of nerve membrane treated elsewhere. This line shapes the signal waveform during transmission, that is, there being a specific pulse-like waveform peculiar to this line, smaller signals are amplified, larger ones are attenuated, narrower ones are widened and those which are wider are shrunk, all approaching the above-mentioned specific waveform. In addition, this line has a certain threshold value in respect to the signal height, and signals smaller than the threshold or noise are eliminated in the course of transmission. Because of the above-mentioned shaping action and the existence of a threshold, this line makes possible highly reliable pulse transmission, and will be useful for various kinds of information-processing systems. more

Topics: Waveform (56%), Transmission (telecommunications) (55%), Pulse shaping (55%) more

3,140 Citations

Journal ArticleDOI: 10.1109/43.45867
L.T. Pillage, R.A. Rohrer1Institutions (1)
Abstract: Asymptotic waveform evaluation (AWE) provides a generalized approach to linear RLC circuit response approximations. The RLC interconnect model may contain floating capacitors, grounded resistors, inductors, and even linear controlled sources. The transient portion of the response is approximated by matching the initial boundary conditions and the first 2q-1 moments of the exact response to a lower-order q-pole model. For the case of an RC tree model, a first-order AWE approximation reduces to the RC tree methods. > more

Topics: Waveform (54%), Linear circuit (54%), RLC circuit (54%) more

1,769 Citations

Journal ArticleDOI: 10.1109/TASSP.1986.1164910
R.J. McAulay1, Thomas F. Quatieri1Institutions (1)
Abstract: A sinusoidal model for the speech waveform is used to develop a new analysis/synthesis technique that is characterized by the amplitudes, frequencies, and phases of the component sine waves. These parameters are estimated from the short-time Fourier transform using a simple peak-picking algorithm. Rapid changes in the highly resolved spectral components are tracked using the concept of "birth" and "death" of the underlying sine waves. For a given frequency track a cubic function is used to unwrap and interpolate the phase such that the phase track is maximally smooth. This phase function is applied to a sine-wave generator, which is amplitude modulated and added to the other sine waves to give the final speech output. The resulting synthetic waveform preserves the general waveform shape and is essentially perceptually indistinguishable from the original speech. Furthermore, in the presence of noise the perceptual characteristics of the speech as well as the noise are maintained. In addition, it was found that the representation was sufficiently general that high-quality reproduction was obtained for a larger class of inputs including: two overlapping, superposed speech waveforms; music waveforms; speech in musical backgrounds; and certain marine biologic sounds. Finally, the analysis/synthesis system forms the basis for new approaches to the problems of speech transformations including time-scale and pitch-scale modification, and midrate speech coding [8], [9]. more

Topics: Speech processing (70%), Non-sinusoidal waveform (65%), Speech coding (61%) more

1,622 Citations

Open accessJournal ArticleDOI: 10.1109/4.52187
Takayasu Sakurai1, A.R. Newton1Institutions (1)
Abstract: An alpha -power-law MOS model that includes the carrier velocity saturation effect, which becomes prominent in short-channel MOSFETs, is introduced. The model is an extension of Shockley's square-law MOS model in the saturation region. Since the model is simple, it can be used to handle MOSFET circuits analytically and can predict the circuit behavior in the submicrometer region. Using the model, closed-form expressions for the delay, short-circuit power, and transition voltage of CMOS inverters are derived. The delay expression includes input waveform slope effects and parasitic drain/source resistance effects and can be used in simulation and/or optimization CAD tools. It is found that the CMOS inverter delay becomes less sensitive to the input waveform slope and that short-circuit dissipation increases as the carrier velocity saturation effect in short-channel MOSFETs gets more severe. > more

Topics: CMOS (54%), Waveform (53%), Inverter (53%) more

1,568 Citations

Journal ArticleDOI: 10.1109/20.43994
G. Bertotti1Institutions (1)
Abstract: Measurements are reported of the loss per cycle (sinusoidal flux waveform) versus magnetizing frequency f/sub m/(0 > more

Topics: Waveform (52%)

1,361 Citations

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Topic's top 5 most impactful authors

Andrew M. Weiner

93 papers, 3.1K citations

Li Weisen

58 papers, 171 citations

Wang Tiejun

58 papers, 171 citations

Wang Yue

58 papers, 171 citations

Paul J. Tasker

48 papers, 1.2K citations

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