. The Bell System technical journal . di - dto Cie = ye ^^^jf^P [sin 0,0 cos ABt + cos 0,o sin A0,]. () C2 V Now AFr Ad = waT + Aw To Vr + V, Ada = AuTc () AVr Adt = CjOoT + ACOTO + AcOTc • Fr+ Fo We observe that the phase angle of the admittance arising on the thirdtransit varies more rapidly with repeller voltage (, frequency) than thephase angle of the second transit admittance. This is of considerable im-portance in understanding some of the features of hysteresis. Let us consider () for some particular values of ^ccr di . We remem-ber that 61 is greater than 6 and hence Co
. The Bell System technical journal . di - dto Cie = ye ^^^jf^P [sin 0,0 cos ABt + cos 0,o sin A0,]. () C2 V Now AFr Ad = waT + Aw To Vr + V, Ada = AuTc () AVr Adt = CjOoT + ACOTO + AcOTc • Fr+ Fo We observe that the phase angle of the admittance arising on the thirdtransit varies more rapidly with repeller voltage (, frequency) than thephase angle of the second transit admittance. This is of considerable im-portance in understanding some of the features of hysteresis. Let us consider () for some particular values of ^ccr di . We remem-ber that 61 is greater than 6 and hence Co > Ci . Since this is so, the limit- . . lAiaV) .... ^ , , ,,^,, 2/i(CiF) mg 1 unction — will become zero at a lower value ot l than — — . C2 F CiV We will consider two cases 61 — (« + 4)27r and dt — (// + f)2x. These 506 BELL SYSTEM TECHNICAL JOURNAL correspond respectively to a conductance aiding and bucking the conduct-ance arising on the first return. In case 1 we have ^, /2/i(C2F) () 2Jl(CiV) Ge - ye Ky 5 0. y ^e - ye C2V AMPLITUDE OF OSCILLATION. V Fig. 28.—Theoretically derived variation of electronic conductance with amplitude o^oscillation. Curve Ge represents conductance arising from drift action in the repellerspace. Curve Gi represents the conductance arising from continuing drift in the cathoderegion. G represents the conductance variation with amplitude which will result ifGe and Ge are in phase opposition. and case 2 ^, , /2/i(C2F)C2 V () Figure 28 illustrates case (2) and Fig. 29 case (1). If cos M, and cos 16varied in the same way with repeller voltage, the resultant limiting functionwould shrink without change in form as the repeller voltage was varied,and it is apparent that Fig. 28 would then yield the conditions for hysteresisand Fig. 29 would result in conditions for a continuous Fig. 28 applied we should hysteresis symmetrical about the opti-mum repeller voltage. We recall, however, that in Fig. 27 hyste
Size: 2483px × 1006px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
