GB251701A - Improvements in or relating to three electrode valves - Google Patents
Improvements in or relating to three electrode valvesInfo
- Publication number
- GB251701A GB251701A GB350625A GB350625A GB251701A GB 251701 A GB251701 A GB 251701A GB 350625 A GB350625 A GB 350625A GB 350625 A GB350625 A GB 350625A GB 251701 A GB251701 A GB 251701A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- plate
- current
- increase
- potential
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000000694 effects Effects 0.000 abstract 2
- 230000010355 oscillation Effects 0.000 abstract 2
- 230000003321 amplification Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 230000003334 potential effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
- H03B9/00—Generation of oscillations using transit-time effects
- H03B9/01—Generation of oscillations using transit-time effects using discharge tubes
- H03B9/02—Generation of oscillations using transit-time effects using discharge tubes using a retarding-field tube
Landscapes
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
251,701. Marconi's Wireless Telegraph Co., Ltd., and Gill, E. W. B. Feb. 7, 1925. Vacuum tubes.-Negative resistance effects in a grid circuit are obtained by a triode con structed so that the maximum plate current under any poten tials on grid and plate is always less than the maximum cathode emission under these conditions, and having its grid and anode maintained at positive potentials such that an increase of cathode emission beyond a critical value produces a disproportionate increase in the grid current, and a corresponding decrease in the plate current. As this critical point occurs at higher values of the cathode emission when the grid voltage is increased, if the emission is constant an increase of grid voltage produces a decrease of grid current over a certain range. A cylindrical plate electrode should have more than 2¢, say 3 to 5 times, the diameter of the grid. When the electrodes are flat, the distance between plate and grid should exceed that between grid and filament. If the plate potential is +8 volts, that of the grid may be +30 to 45 volts. If a tuned circuit 4, 5 is connected to the grid, and the potentials adjusted to obtain the negative resistance effect, oscillations of high or low frequency may be generated, independently of any reactive coupling between the plate and grid circuits. If the grid potential be kept constant and the plate potential varied, a range can be found in which the curve showing the relation of plate voltage to grid current has a very steep portion, giving high amplification. This can be used to produce oscillations by reaction, the oscillating circuit being in the grid lead.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB350625A GB251701A (en) | 1925-02-07 | 1925-02-07 | Improvements in or relating to three electrode valves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB350625A GB251701A (en) | 1925-02-07 | 1925-02-07 | Improvements in or relating to three electrode valves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB251701A true GB251701A (en) | 1926-05-07 |
Family
ID=9759614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB350625A Expired GB251701A (en) | 1925-02-07 | 1925-02-07 | Improvements in or relating to three electrode valves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB251701A (en) |
-
1925
- 1925-02-07 GB GB350625A patent/GB251701A/en not_active Expired
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