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| A vacuum tube electronic device, invented in ] by ], scientific adviser to the ] company based on an observation by ]. | A ] electronic device, invented in ] by ], scientific adviser to the ] company based on an observation by ]. | ||
| The predecessor of ] electronic devices. | The predecessor of ] electronic devices. | ||
Revision as of 10:22, 30 October 2001
A vacuum tube electronic device, invented in 1904 by J. Ambrose Fleming, scientific adviser to the Marconi company based on an observation by Thomas Edison.
The predecessor of semiconductor electronic devices.
Thermionic valve devices include diodes, triodes, tetrodes, and pentodes.
References: