I. On parametric oscillations in electronic circuits; and, II. A graphical analysis for non-linear systems

INTRODUCTION • • PART I ON PARAMETRIC OSCILLATIONS IN ELECTRONIC CIRCUITS • 1. Preliminary • 2. Mathematical Analysis • 2.1 Self-Excitation • 2.1.1 Periodic Solutions • 2.1.2 Stability of Periodic Solutions • 2.1.3 Special Cases • 2.2 Forced Oscillations • 3. Experimental Arrangements and Results • • PART II A GRAPHICAL ANALYSIS FOR NON-LINEAR SYSTEMS • 1. General Principles and Method of Construction • 2. Applications • 2.1 Circuits Containing Gaseous Conductors • 2.2 Closed-Cycle Control Systems With Non-Linear Friction • 2.3 Closed-Cycle Control Systems With Backlash • 2.4 Frequency Modulation of Forced Oscillations in Section 2.2, Part I • 2.5 Amplitude Modulation of Forced Oscillations in Section 2.2, Part I