HAVING LOGIC LEVELS CONVEYED BY SIGNAL FREQUENCY OR PHASE:
(under the class definition) Subject matter wherein the logic circuit receives or produces digital signals which are different in the number of periodic cycles in a unit of time (frequency), or in the relative timing of a signal in
relation to another signal (phase).
SEE OR SEARCH CLASS
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
2+, for phase discriminators, subclasses 39+ for frequency discriminators, subclasses 113+ for frequency control, and subclasses 231+ for phase shift control.
