Driving current

When a battery (or a generator or other power supply) outside the system drives current, i.e. a flow of electric charge, tlirough a wire that passes tlirough the system, work is done on the system ... 

Frequently a modulation of light is introduced to the system in order to increase the signal to noise ratio. Flash lamps by their construction give pulses of light with repetition, which can be controlled by the user. Other lamps cannot be modulated through their driving current because the emitted radiation would be unstable over time. In this case, the application of an external modulator, e.g. a mechanical chopper, is the only solution. In both cases, the frequency of modulation is rather low - up to kilohertz. 

You have to follow the gray current loops that show how the Gate drive current flows. The lower Fet is in effect very close to the IC, because the ground plane cancels most of the... 

Reichert J, Ochs R, Beckmann D, Weber HB, Mayor M, von Lohneysen H (2002) Driving current through single organic molecules. Phys Rev Lett 88 176804... 

FIGURE 1.11 Luminous efficiency as a function of driving current in a PLED made with Covion PDY. 

M Ishii and Y Taga, Influence of temperature and drive current on degradation mechanisms in organic light-emitting diodes, Appl. Phys. Lett., 80 3430-3432, 2002. 

The positive section of the power banks shown in Fig. 14 uses 40 type-N power Mosfet devices which can drive currents of up to 400 A. The same banks mount also 4 type-P devices for the negative section. The number of devices in the negative section is much smaller since the negative side is subject to much smaller power requirements. All 44 devices are mounted, together with their electronic control boards, on four special liquid-cooled, copper heat sinks. These, thanks to the excellent thermal conductivity of copper, combined with a design which maximizes the contact area between the copper and the cooling liquid, makes it possible to reach the requested cooling efficiency. 

Advantages Good drive current capability, reduced turn-on switch transient currents Disadvantages Higher parts count than other solutions, slower tum-on that creates higher power dissipation in the MOSPET... 

The answer is very much yes . Just a few examples driving current interest in this subject are ... 

In this section, many of the objectives driving current research in the field of modified electrode surfaces are identified. The constraint that the application should involve coordination compounds is applied hence a somewhat constricted view is obtained which is nonetheless, fortuitously, reasonably comprehensive. 

Finally, the economics that both drive current policies and present barriers to implementing change cannot be ignored. Concerns about the fiscal and administrative aspects of the issue have been a major stumbling block in the past and are likely to continue. The parties responsible for the containment of... 

Separation capillary columns are made in fluorinated ethylene- propylene copolymer. Detection is achieved by conductivity cells and an ac. conductivity mode of detection is used for making the separations visible. The driving current is supphed by a unit enabling independent currents to be preselected for the preseparation and final analytical stages. The run of the analyser is controlled by a programmable timing and control unit. The zone lengths from the conductivity detector, evaluated electronically, can be printed on a line printer. 

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