Investigations of magnetic amplifiers with feedback

Sine wave carrier excited magnetic amplifiers have been investigated to determine if the figure of merit can be improved through the use of feedback techniques. It is shown that the power gain can be made unlimited but that a finite rise time is preserved. Hence the figure of merit as ordinarily defined becomes meaningless. It is shown, however, that voltage gain divided by rise time remains nearly constant under feedback and is a more suitably defined figure of merit.