(under subclass 524) Subject matter wherein a particular circuit includes an impedance network which is provided in the input circuit of a control grid of an electron space discharge tube whereby the conductive state of the tube depends upon the state of the impedance network.
SEE OR SEARCH CLASS
313, Electric Lamp and Discharge Devices,
293+, for a discharge device with apertured electrode (e.g., grid) between two other electrodes.
315, Electric Lamp and Discharge Devices: Systems, appropriate subclasses for such discharge device systems as those which control a discharge device as the ultimate load
therein.
330, Amplifiers, appropriate subclasses for grid controlled tube amplifiers.
