SCREEN GRID Meaning and
Definition
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Screen grid refers to a component or structure found in electronic devices, particularly vacuum tubes or valves, and is used as an electrode to control the flow of electrons. It is commonly employed to help modulate the flow of current through the tube and to enhance overall performance.
In a vacuum tube, the screen grid acts as an intermediate electrode between the control grid and the plate or anode. The screen grid is typically constructed as a metal mesh or grid, placed around the control grid, and is internally connected to a lower voltage supply relative to the plate voltage. This configuration ensures proper electron flow, enabling the screen grid to act as a kind of electrostatic shield, controlling the flow of electrons passing through the control grid and modulating the current flowing from the cathode to the anode.
The screen grid's primary function is to provide a uniform electric field within the tube, thus preventing unwanted distortions or nonlinearities. It helps in maintaining a constant voltage potential between the control grid and anode, preventing any unpleasant effects on the amplification process. Additionally, it aids in improving the tube's linearity, efficiency, and overall performance by reducing unwanted capacitance and undesired secondary emission effects.
Overall, the screen grid plays a crucial role in vacuum tubes by facilitating controlled electron flow, maintaining proper voltage distribution, and enhancing the overall efficiency and performance of electronic devices.
Common Misspellings for SCREEN GRID
- acreen grid
- zcreen grid
- xcreen grid
- dcreen grid
- ecreen grid
- wcreen grid
- sxreen grid
- svreen grid
- sfreen grid
- sdreen grid
- sceeen grid
- scdeen grid
- scfeen grid
- scteen grid
- sc5een grid
- sc4een grid
- scrwen grid
- scrsen grid
- scrden grid
- scrren grid
Etymology of SCREEN GRID
The word "screen grid" is a compound term that combines the words "screen" and "grid".
The term "screen" originated in Middle English as "screne", derived from Old Norse "skraut" meaning "a partition". It referred to a partition or divider used to separate or conceal something. Over time, the meaning expanded to include a protective or separating barrier, such as a woven or perforated material used to block out light, insects, or unwanted views while allowing airflow.
The term "grid" comes from the Old English word "grīd", meaning "a latticework or sieve". It evolved from Proto-Germanic "greþō", which referred to a grating or lattice used for sifting or separating materials. Later, "grid" came to denote a network of intersecting or parallel lines, often forming squares or rectangles.
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