The feasibility of using the phase plane to characterize, as well as analyze, non-linear elements and circuits was investigated at the University of Notro Dazoe in the Department of Electrical Engineering. The energy relationships obtained from the phase plane radius and phase plane area are used to characterize non-linear inductors. The phase space, i.e., the space constructed from more than one derivative and the dependent variable, is used for the analysis of a circuit composed of a non¬linear inductor and a capacitor in series. The experimentally obtained phase plane is used in the study of Van der Pol's and Duffing's Equations to locate conditions of stability and instability, and the results suggest some further mathematical investiga¬tion. The use of a Thyrite, non-linear, resistor as a plate load resistor in a triode voltage amplifier is reported. It is shown that the output may be linearized, and the distortion consequently decreased, without the loss in gain encountered when the same objective is attempted by the use of negative feedback.
展开▼
