No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Fluctuation Noise in Vacuum Tubes
1.J. B. Johnson, Phys. Rev. 32, 97 (1928).
2.H. Nyquist, Phys. Rev. 32, 110 (1928).
3.During the preparation of this paper a paper by E. B. Moullin and H. D. Ellisentitled Spontaneous Background Noise in Amplifiers Due to Thermal Agitation and Shot Effects appeared in I.E.E. J. 74, 323 (1934).
3.The authors there contend that no thermal noise is produced in the plate impedance of a thermionic vacuum tube and that shot noise is not altered by the presence of space charge. With these contentions I cannot agree and I hope to state my definite reasons therefore at a later date.
4.F. B. Llewellyn, Proc. I.R.E. 18, 243 (1930).
5.W. Schottky, Ann. d. Physik 57, 541 (1918);
5.T. C. Fry, J. Frank. Inst. 199, 203 (1925);
5.A. W. Hull and N. H. Williams, Phys. Rev. 25, 147 (1925).
6.Everett W. Thatcher, Phys. Rev. 40, 114 (1932).
7.J. B. Johnson, Phys. Rev. 26,71 (1925);
7.W. Schottky, Phys. Rev. 28, 74 (1926).
8.L. R. Hafstad, Phys. Rev. 44, 201 (1933).
9.E.g., reference (4) or (5).
10.Stuart Ballantine, Physics 4, 294 (1933).
11.It is assumed that tube noise does not vary with frequency, or that the band width of the amplifier is so narrow that no appreciable error is introduced in applying the result.
12.The essential parts of this amplifier were designed by Mr. E. T. Burton.
13.Noise measurements on R.C.A. 38 and General Electric P.J. 11 tubes have recently been reported by E. A. Johnson and C. Neitzert, R.S.I. 5, 196 (1934).
14.M. J. Kelly, Soc. Motion Picture Eng. J. 18, 761 (1932).
15.I am indebted to Dr. J. R. Dunning of Columbia University for pointing out this fact.
16.Other investigators have also found an increase in tube noise energy at the lower frequencies.G. F. Metcalf and T. M. Dickinson, Physics 3, 11 (1932).
17.H. Greinacher, Zeits. f. Physik 36, 364 (1926).
18.B. A. Kingsbury, Phys. Rev. 38, 1458 (1931).
Article metrics loading...
Full text loading...
Most read this month
Most cited this month