(under subclass 401) Subject matter wherein a device is used in which an energy source alters the value of a parameter of an energy storage element.
(1) Note. A parametron is essentially a resonant circuit with a nonlinear reactive element which oscillates at half the driving frequency. The oscillation can be made to represent a binary digit by the choice between two stationary phases pi radians apart.
(2) Note. Parametric excitation is the method of exciting and maintaining oscillation in which excitation results from a periodic variation in an energy storage element, e.g., capacitor or inductor.
(3) Note. A digital circuit operates like a switch, i.e., it is either "on" or "off".
