Abstract
In this report, the writer poposes a new methol of delineating the wave forms of radio frequency currents in an oscillation circuit by means of a Braun tube, the cathode-ray oscillograph.
The method of wave form analysis with what is called "cyclic current diagram" was originally invented by Prof. H. Yagi in 1916, and has been used for the purpose of obtaining the wave form of high frequency current by taking the diagram which is described on the fluorescent screen by the cathode-ray beam under the deflecting actions of the current i and the terminal voltage of an inductance or L di/dt in the orthogonal directions to each other. This method is, however, insufficient for the exact delineation particularly for the interval when no current, variation takes plaee or di/dt=0.
Besides cyclic current diagram, the new method requires what the writer will call "integral current diagram", which is obtained by the combined actions of current i and the terminal voltage of the condenser or 1/C∫idt.
Although this method is a little more tedious and is applicable only to high frequency currents in condenser circuits, it is very exact and when the apacity of the condenser is known, we can determine not only the wave form, but also the time intervals exactly, and consequently we can calculate out the frequency of the current.
As an example of this method of deliueation, are oscillations are studied experimentally for the special case where the oscillation circuit has no resistance. In this case, the are hysteresis can be obtained indirectly from these two diagrams.
This report includes the following topies;
I. Introduction-Cathode-ray oscillograph
II. "Integral current diagram"
III. Are oscillations
(a) wave forms of oscillating currents
(b) dynamic characteristics of the oscillating arcs
IV. Conclusions Literatures.
