Linear Time-Varying Circuits-Matrix Manipulations, Power Relations, and Some Bounds on Stability
S. Darlington · Bell System Technical Journal · 1963
This paper is concerned with general circuits of linear, time-varying, positive, two-terminal components. It describes methods of manipulating corresponding matrix (vector) differential equations. It uses the manipulations to derive equations for power and bounds on stability. The bounds apply to the exponential factors associated with the basis functions of periodically varying circuits