(under the class definition) Subject matter including at least two amplifying devices of the vacuum tube type, each having at least three electrodes including a control grid electrode, wherein at least a portion of the anode-cathode power supply current, for one of the amplifying devices, flows in series from the power supply source through the space discharge path of the other amplifying device, so that the tubes are series energized (at least in part) from the power supply.
SEE OR SEARCH THIS CLASS, SUBCLASS:
87+, for cathode impedance feedback, particularly subclass 95.
128, for control means for the anode circuit including diode space discharge paths in such circuits.
202, for anode power supply, generally. See the search notes thereunder.
293, and 310+, for cascaded semiconductor amplifiers series energized for power. SEE OR SEARCH CLASS
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
530+, for miscellaneous electron tube circuits with a particular source of power or bias voltage.
329, Demodulators, appropriate subclasses for a demodulator with particular power supply circuitry.
