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Class Information
Number: 330/64
Name: Amplifiers > With space charge grid tube
Description: Subject matter wherein the amplifying device is of the vacuum tube type having a positively charged grid (with respect to the cathode) immediately adjacent the cathode, which neutralizes the negative space charge of the electrons emitted from the cathode so that a "virtual cathode" is produced on the side of the space charge grid on which the anode is situated, said tube having a normally negatively biased control grid next to the space charge grid, to which the signal is coupled, and an anode to receive the electrons emitted by the cathode, and which may have additional electrodes between the control grid and the anode.

Patents under this class:

Patent Number Title Of Patent Date Issued
6424219 Operational amplifier Jul. 23, 2002

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