Cold Cathode Gas Filled Diode: The cutaway view of a Cold Cathode Gas Filled Diode is shown in Fig. 5.24. It essentially consists of two electrodes, namely cathode and anode, mounted fairly close together in…
Explain Conduction in Gas: Explain Conduction in Gas - The introduction of small amount of gas into the electron evacuated tubes entirely changes the operating characteristics—materially giving in general a greatly diminished voltage drop and…
Classification of Gas Filled Tubes: Vacuum tubes are no doubt, extensively used in communication control and industrial electronic circuits, but these can carry small plate currents (typically from 1 mA to 100 mA). For certain…
Construction and Working of Vacuum Pentode: In order to retain the advantages of screen grid and eliminate the harmful effects of attracting the electrons due to secondary emission by the screen grid, an additional third…
Construction of Vacuum Tetrode, Working and Applications: Tetrode means four, hence tetrode is a four electrode tube consisting of a cathode, a control grid, a screen grid, and a plate. The constructional features of a…
Vacuum Triode, Construction and Working: Construction of Vacuum Triode - The construction and the schematic symbol used for a vacuum triode are illustrated in Fig. 5.8. It, as the name suggests, consists of three electrodes…
What is Vacuum Diode, Construction, Working and Applications: Construction of Vacuum Diode - Vacuum diode is the simplest form of the electron tube for the production and control of free electrons. A typical vacuum diode…
What is Cathode or Emitter and Types of Cathode? The substance employed for electron emission is called a cathode or emitter. It is an essential part of an electron tube. The usefulness of a particular…
What is Photoelectric Emission and Laws of Photoelectric Emission?: When the surface of certain alkaline material such as sodium, potassium, cesium or rubidium is illuminated by a beam of light or ultraviolet radiations, the electrons…
Field Emission or Cold Cathode Emission: The metal piece can also be made to emit electrons by creating an high intensity electrostatic field near it. Such an emission of electrons is known as field emission…
