Abstract
An analysis is presented of space charge control in L.S.A. operation of transferred electron devices for a range of velocity-field characteristics. It is concluded that the shape of the Butcher and Fawcett characteristic is close to the optimum for a peak to valley ratio of 2.6 providing that doping inhomogeneities cause less than a 5 per cent electric field variation. A large signal calculation of the accumulation layer decay rate is presented and it is shown that in long samples this monopolar space charge can decay much more rapidly than dipolar space charge.
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