Topic
Rise time
About: Rise time is a research topic. Over the lifetime, 4748 publications have been published within this topic receiving 47512 citations.
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TL;DR: Results for various processes show that the proposed self-tuning FLC outperforms its conventional counterpart in each case.
168 citations
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TL;DR: It is shown that arbitrary transient response specifications, namely one with independently specified overshoot and specified rise time or speed of response can be exactly attained.
Abstract: This note develops an approach to directly control the transient response of linear time-invariant control systems. We begin by considering all-pole transfer functions of order n for which we introduce a set of parameters /spl alpha//sub i/, i=1,...n called the characteristic ratios. We also introduce a generalized time constant /spl tau/. We prove that /spl alpha//sub 1/ and /spl tau/ can be used to characterize the system overshoot to a step input and the speed of response, respectively. By independently adjusting /spl alpha//sub 1/ and /spl tau/ in all-pole systems, arbitrarily small or no overshoot as well as arbitrarily fast speed of response can be achieved. These formulas are used to develop a procedure to design feedback controllers with feedforward or two parameter output feedback type for achieving time response specifications. For a minimum phase plant we show that arbitrary transient response specifications, namely one with independently specified overshoot and specified rise time or speed of response can be exactly attained.
167 citations
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TL;DR: In this article, a single-Cooper-pair box (SCB) was fabricated by capacitively coupling a SCB to an electrometer based upon a singleelectron transistor (SET) configured for radio-frequency readout (rf-SET).
Abstract: We have fabricated a Josephson charge qubit by capacitively coupling a single-Cooper-pair box (SCB) to an electrometer based upon a single-electron transistor (SET) configured for radio-frequency readout (rf-SET). Charge quantization of 2e is observed and microwave spectroscopy is used to extract the Josephson and charging energies of the box. We perform coherent manipulation of the SCB by using very fast dc pulses and observe quantum oscillations in time of the charge that persist to ≃10 ns. The observed contrast of the oscillations is high and agrees with that expected from the finite EJ/EC ratio and finite rise time of the dc pulses. In addition, we are able to demonstrate nearly 100% initial charge state polarization. We also present a method to determine the relaxation time T1 when it is shorter than the measurement time
166 citations
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TL;DR: In this paper, single crystal ZnO microwires (MW) with size of ∼5.4 mm were prepared through a chemical vapor deposition technique at high temperature (1200 °C), and p-type conducting polyaniline (PANI) polymers with different conductivities were densely coated on part of the MW to construct organic/inorganic core-shell heterojunction photodetectors.
164 citations
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01 Nov 1997TL;DR: A general methodology to analyze crosstalk to obtain insight into effects that are likely to cause errors in deep submicron high speed circuits and shows that crosStalk effects can be significantly aggravated by variations in the fabrication process.
Abstract: In this paper we develop a general methodology to analyze crosstalk to obtain insight into effects that are likely to cause errors in deep submicron high speed circuits. We focus on crosstalk due to capacitive coupling between a pair of lines. We first consider the case where crosstalk noise manifests as a pulse and characterize the maximum amplitude, width, energy and timing of this pulse. Closed form equations quantifying the dependence of these pulse attributes on the values of circuit parameters and the rise time of the input transition are derived. We also consider how crosstalk causes slowdown (speedup), i.e. increases (decreases) the rise/fall times of signals on coupled lines, when their inputs have transitions in the opposite (same) directions. Expressions relating the slowdown (speedup) to circuit parameters, the rise/fall times of the input transitions, and the skew between the transitions are derived. We show that crosstalk effects can be significantly aggravated by variations in the fabrication process. New design corners are identified for validation of designs that have significant crosstalk effects. Finally, the results of our analysis provide conditions that must be satisfied by a sequence of vectors used for validation of designs as well as post-manufacturing testing of devices in the presence of significant crosstalk.
147 citations