. The Bell System technical journal . a > 1 USUALLY Fig. 9—Transistor-electron tube analogy. for the triode is close to unity for usual conditions. Another difference, ofless importance, is the fact that the tube quantities analogous to re and n,are capacitative reactances; their ratio, however, is like the ratio of r^ to rbin magnitude. One of the first consequences of this transistor-tube analogy is the sugges-tion that different transistor connections analogous to the different electrontriode connections may be interesting.^ The analogy makes emitter analogous ^Vacuum Tube Networks, F. B
. The Bell System technical journal . a > 1 USUALLY Fig. 9—Transistor-electron tube analogy. for the triode is close to unity for usual conditions. Another difference, ofless importance, is the fact that the tube quantities analogous to re and n,are capacitative reactances; their ratio, however, is like the ratio of r^ to rbin magnitude. One of the first consequences of this transistor-tube analogy is the sugges-tion that different transistor connections analogous to the different electrontriode connections may be interesting.^ The analogy makes emitter analogous ^Vacuum Tube Networks, F. B. Llewellyn and L. C. Peterson, Fror. March1944, page 159, Fig. 13.^Loc. cit. 376 BELL SYSTEM TECHNICAL JOURNAL to cathode, base to grid, and collector to plate; the conventional or groundedcathode tube connection is therefore analogous to the grounded emitterconnection of a transistor, shown on Fig. 10. It is found that when a = \the analogy is fairly close, in that the transistor has comparatively high-
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