Voltage spike

The inductance in the d.c. link may cause a reverse voltage spike across the power diodes or thyristors as a residt of the decay of the reverse current (release of its stored energy). A power deviee may be protected against such voltage spikes through tin R-C snubber circuit, as shown in Figure 6.37. (This circuit is discussed later.)... 

Voltage spikes may have high amplitudes but are of extremely short duration, like an FOW. 

A defined period of time where the input voltage will exceed the Ki (hij specification that the unit must survive and during which it may need to operate. These are very high voltage spikes (-t/-) that are characteristic of the input power system. 

During the prototype stage, verify its operation with respect to the level of voltage spikes, cross regulation, output accuracy and ripple, and RFI, etc., and make corrections where necessary. 

The physical design of the transformer is critical in flyback converters. If they are not properly designed physically, excessive voltage spikes could be generated that would adversely affect the reliable operation of the semiconductor components (refer to Section 3.5.8). 

In a typical FT-ICR experiment, after ion detection, a voltage spike is used to eject all ions from the cell in preparation of a new experiment. However, instead of being ejected from the cell, the ions can be allowed to relax to the center of the cell through collisions with background gases. These ions can then be re-excited and measured several times.This remeasurement process may reduce the amount of sample required for FT-ICR analysis, a capability that is very important in biological applications. 

In 1919, Barkhausen performed an experiment by connecting a solenoid with a magnetic core to an amplifier and loudspeaker. When the magnet was subjected to full hysteresis (1, pp. 19-27), he heard a cracking noise in the speaker. When such a speaker is replaced by an oscilloscope, irregular voltage spikes may be observed. Those... 

Experimental data shows a strong variation of the effective temperature with the waiting time by several orders of magnitude. The voltage signal is also intermittent with strong voltage spikes at random times. The distribution of the... 

Why do biological noses perform so much better They contain a large array of olfactory neurons which communicate stochastic voltage spikes to the brain. When odor molecules are adsorbed by a number of neurons, the statistical properties of these stochastic spikes change. The brain decodes the changes in statistics and matches the result with an odor database in memory. 

In Donald s experiments (D16, D17), those not reaching a convulsive end point showed a tendency toward a slight increase in beta activity and increased synchronization of delta activity in the EEG. Coupled with this was a decrease in the amount and voltage of the dominant alpha frequency (6-12 cps). Single high-voltage spikes appeared infrequently these were symmetrical and bilateral. 

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