. The Bell System technical journal . effects. The equivalence expressed by Fig. 2 is the familiar circuit whichhas found such wide application, for instance, in amplifier and oscil-lator work; while the equivalent circuits in Figs. 3 and 4 representthe second and third order effects. With no feedback, that is whenZ2 is infinite, they reduce to the equivalences given by Carson.^ Com-paring now any two equivalent circuits for same order effects with andwithout feedback we find different values of the electromotive forcesappearing in series with the internal tube resistance Rq. Otherwise 1 Loc.
. The Bell System technical journal . effects. The equivalence expressed by Fig. 2 is the familiar circuit whichhas found such wide application, for instance, in amplifier and oscil-lator work; while the equivalent circuits in Figs. 3 and 4 representthe second and third order effects. With no feedback, that is whenZ2 is infinite, they reduce to the equivalences given by Carson.^ Com-paring now any two equivalent circuits for same order effects with andwithout feedback we find different values of the electromotive forcesappearing in series with the internal tube resistance Rq. Otherwise 1 Loc. cit., equations (23) and following. THEORY OF THREE-ELECTRODE VACUUM TUBE CIRCUITS 527 the two circuits are identical except that for one the impedance Z2 isfinite and for the other infinite. By the aid of the equivalent circuits given, that is by using equations(10), (11), (12), (13) and so forth, the terms in the series (4) can becalculated. These series formally satisfy equations (2) and (3) andare the solutions if they Fig. 3—Equivalent circuit, second order effects.
Size: 2517px × 993px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
