The Characteristic Surface of the Triode
J.R. Tolmie · Proceedings of the IRE · 1924
The paper outlines a method of representing triode characteristics by means of surfaces rather than by families of characteristic curves. The physical features of the surfaces are then described in considerable detail and the fundamental equation for the alternating component of the plate current is derived for an ideal surface. Finally the action of the triode both as a simple and as a regenerative amplifier is described with reference to its characteristic surface.