Topic
Rise time
About: Rise time is a research topic. Over the lifetime, 4748 publications have been published within this topic receiving 47512 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, a low noise, wide bandwidth preamplifier and signal processing filter for high counting rate proportional counters were developed, which is an optimized common base input design with 2 ns rise time and an equivalent noise input charge /lt 2000 r.m.s.
42 citations
TL;DR: In this paper, 606 joules were extracted from a 22-l active volume, 5-atm laser mixture, in a 180-ns (FWHM) optical pulse, based on the available energy stored in the double Blumlein.
Abstract: Sixty‐six joules has been extracted from a 22‐l active volume, 5‐atm laser mixture, in a 180‐ns (FWHM) optical pulse. The best efficiency obtained under these conditions was 0.8%, based on the available energy stored in the double Blumlein. For the laser chamber geometry used in this experiment it was essential that the surface track path between the positive high‐voltage electrode and any ground be a minimum of 3 times the interelectrode separation. The small‐signal gain under these operating conditions was 6.0% cm−1 and the measured absorption at the peak of the gain was 0.4% cm−1. We observe that for both volumetric scaling and pulse length scaling the current rise time is of critical importance.
42 citations
Patent•
21 May 1996
TL;DR: In this article, a method and apparatus for producing a temperature stabilized frequency from a signal generator in a monitoring station is described, where the signal generator monitors the voltage response of an RC circuit where the resistive portion is formed by a thermistor, to produce a timedependent signal.
Abstract: A method and apparatus for producing a temperature stabilized frequency from a signal generator in a monitoring station is described. The signal generator monitors the voltage response of an RC circuit where the resistive portion is formed by a thermistor, to produce a time-dependent signal. A comparator compares the time-dependent signal to a reference voltage to determine a rise time of the voltage across the capacitor. Based upon a software timer loop, the signal generator determines a temperature range by selecting data from a look-up table based upon the rise time of the RC circuit.
42 citations
TL;DR: In this article, an output-capacitor-less low-dropout regulator (LDO) with a low-power output voltage detector (OVD) is proposed, which is based on an R/C high-pass filter which is able to detect the fast-changing voltage at the LDO output and activate an additional path to control the power transistor.
Abstract: An output-capacitor-less low-dropout regulator (LDO) with a low-power output voltage detector (OVD) is proposed. The OVD is based on an R/C highpass filter which is able to detect the fast-changing voltage at the LDO output and activate an additional path to control the power transistor. The OVD consumes only additional quiescent current to monitor the variation in output voltage in the steady state. In the simulated load-transient response, a maximum undershoot of 1.2 V and a settling time (Δt
2
) of 67 ns are observed with the proposed OVD for a load current variation from 1 to 50 mA at a rise time of 1 ns. These results are 0.2 V and 473 ns better than the results obtained without the proposed OVD.
42 citations
TL;DR: In this paper, a particle-in-cell simulation is used to study the time-dependent evolution of the potential and the electrical field surrounding two-dimensional objects during a high voltage pulse in the context of plasma immersion ion implantation.
Abstract: A particle-in-cell simulation is used to study the time-dependent evolution of the potential and the electrical field surrounding two-dimensional objects during a high voltage pulse in the context of plasma immersion ion implantation. The numerical procedure is based on the solution of Poisson’s equation on a grid and the determination of the movement of the particles through the grid. Ion current density, implanted concentration, average impact energy, and impact angle of the ions were calculated using this method for two geometrical shapes, a square and an L-shaped object. The nonuniformity of the sheath potential near convex and concave corners is shown. The divergence of the electrical field in the vicinity of corners leads to dramatically reduced concentration of the incident ions. The simulation also shows that a large ion flux hits the surface during the rise time of the pulse. Directly after the rise time, more than 40% of the whole concentration is implanted. Hence, the average impact energy of t...
41 citations