 489  112. Consequently, the proper bias conditions are no longer satisfied for some part of the ion emitter. As a result the system is forced into the Z-state and the collector current becomes small. 113. According to the quantum theory, radiative energy is always collected into certain discrete portions, known as «light-quanta» and to see an object it is necessary for at least one light-quantum to be reflected from its surface. 114. In normal operation, the oscillator is shut off until a 1-msec negative pulse is applied to the grid of V2A. 115. The problem of space-charge cancellation is not unique to the thermionic energy converter, but is common to high-current electron tube devices for rectification and switching purposes. 116. Various kinds of laboratory tests, such as resoldering, heat cycles, tensile strength, weighting, bending, and vibration, were carried out on test pieces made by the new jointing method. 117. Therefore, when calculating the minimum noise figure an additional requirement (e. g. bandwidth or stability) must be taken into account, so that the mathematical problem is that of a minimum under constraints. 118. In order for the practicing engineer to arrive at feedback control system design that best meets the requirements of particular application, it is desirable that a general design procedure should be available. Such a procedure has grown up in the last few years. 119. If a given frequency band is to be used for space and earth-based repeaters simultaneously, several possible intenference paths must be studied. 120. It may be noted, incidentally, that considerably more free sulfate (150 and 144 moles in the two experiments) appeared than can be accounted for by the hydrolysis of the carcinogen metabolites. 121. Earthed-grid triodes require more stages, but a high degree of linearity is more readily obtainable, provided that grid-current distortion can be kept low. 489 |
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