rise time

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rise time

1. the time required for a pulse or echo to rise from onset to its peak amplitude;
2. the time required for a pulse or echo to rise from 10-90% peak amplitude.
Farlex Partner Medical Dictionary © Farlex 2012

rise time

(rīz tīm)
The time it takes a gradient to switch on, achieve the required gradient slope, and switch off again in magnetic resonance imaging.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Duration Time between the first and the last overshot of the predefined threshold Risetime Time between the first overshoot of the defined threshold and the peak in the AE burst.
* Nature of physical energy--amplitude, risetime, wavelength, duration, reflection.
Cuestiones como las anteriores nos hacen pensar que, previsiblemente, la eleccion de otros sonidos semejantes a los presentados para modular el reflejo de sobresalto (el mas frecuente ha sido un ruido blanco de 50ms, con risetime instantaneo y 95dB de intensidad), tonos como los de los concursos asociados a ejecuciones correctas/incorrectas, verbalizaciones que puedan atribuirse a la propia ejecucion pero que sean incontrolables desde el punto de vista objetivo, o algunos sonidos tambien relevantes desde el punto de vista evolutivo pero mas afines a la poblacion de ansiedad en concreto, como latidos cardiacos acelerados (similares a los utilizados por Pollock, Carter, Amir, y Marks, 2006), nos permitiria conocer mejor la funcionalidad de la red de alerta.
TABLE 1 Termination Length by Family MAX LINE MAX LINE LENGTH LENGTH --INNER --OUTER DEVICE TYPE RISETIME (in./mm) (in./mm) Standard TTL 5.0 nSec 7.27/185 9.23/235 Schottky TTL 3.0 nSec 4.36/111 5.54/141 10K ECL 2.5 nSec 3.63/92 4.62/117 ASTTL 1.9 nSec 2.76/70 3.51 /89 FTTL 1.2 nSec 1.75/44 2.22/56 BICMOS 0.7 nSec 1.02/26 1.29/33 10KH ECL 0.7 nSec 1.02/26 1.29/33 100K ECL 0.5 nSec .730/18 .923/23 GaAs 0.3 nSec .440/11 .554/14 Other 0.1 nSec 0.15/4 0.18/5 Note: Approximation calculated assuming a nominal Er = 4.1 * Table published by Rick Hartley in his High Speed Design Presentations
TABLE I TYPE OF PULSE SOURCES AND THEIR CHARACTERISTICS (5) Best Available Risetime at Type Step/Pulse Amplitude Notes Mercury switch step 70 ps 300 V max PRF = 200 Hz Avalanche transistor pulse 150 ps 12 V device selection necessary Tunnel diode step 25 ps 0.25 V fastest transition time 100 ps 1.0 V 60 ps 20 V commercially available Step recovery step 100 ps 50 V specially ordered 200 ps 200 V four-stack Avalanche diode impulse 400 ps 125 V MHz rep.
Parameter New Substrate 3-2-3 Buildup Core thickness ([micro]m) 8 500 Estimated power distribution 0.47 0.70 impedance (1 GHz) Vertically distributed power 0.91 2.20 distribution impedance (1 GHz) Crosstalk (% @ 2.5V, 200ps risetime, <1% <1% 25 mm coupling, 2x aggressor lines, 100 [micro]m pitch) Routing (signals per column at 200 10.5 6.4 [micro]m effective flip-chip pitch)
The stimulus duration was 0.1 seconds with a 0 ms risetime for all presentations.
Teledyne LeCroy's Mike Hertz will be joined by Shubhankar Marathe, Giorgi Maghlakelidze, and David Pommerenke of the Missouri S&T EMCLAB to present a paper titled "Implementation and Practical Experience with an Automatic Secondary ESD Detection Algorithm." They will point out that EMC test standards such as ISO 10605 require capturing 10 consecutive ESD pulses and recording the risetime values.
It was setted with an amplitude thresholds of 26.7dB, a risetime threshold of 2 [micro]s, and a pre-amplification of 34dB (from 2.5kHz to 1MHz).
The J730 provides a digital logic output with risetime below 750 ps, and a fast analog (180 MHz bandwidth) output is also provided for monitoring link integrity.
TH1E-3: Optoelectronic Techniques for Improved High Speed Electrical Risetime