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
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
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB485120A (en) | Improvements in or relating to relaxation oscillation generators | |
US2213551A (en) | Electron discharge device | |
GB251701A (en) | Improvements in or relating to three electrode valves | |
GB467915A (en) | Improvements in or relating to electron discharge devices and to circuits therefor | |
GB525951A (en) | Improvements in or relating to electron discharge device amplifier oscillator and like circuit arrangements for use on very high frequencies | |
GB514297A (en) | Improvements in or relating to electron multipliers and circuits therefor | |
US2068388A (en) | Electron tube in a retarding field circuit | |
GB471672A (en) | Improvements in or relating to electron discharge devices | |
GB437804A (en) | Improvements in or relating to thermionic valves for use in radio signalling systems | |
US1661830A (en) | Electron-discharge device | |
US1313188A (en) | Means for producing alternating currents | |
GB252079A (en) | Improvements in or relating to four electrode valves and to means for obtaining highfrequency or low frequency magnification or rectification therewith | |
US1964517A (en) | Means to diminish secondary electron emission | |
GB184875A (en) | Improvements in and relating to electron discharge apparatus | |
US1534970A (en) | Production of electrical oscillations by means of thermionic valves | |
GB714528A (en) | Improvements in or relating to circuits for transforming the frequency of high-frequency oscillations | |
US1398665A (en) | Thermionic amplifier | |
GB392425A (en) | Improvements in or relating to very short wave electrical oscillation generating arrangements | |
Levan et al. | A new type of gas-filled amplifier tube | |
GB474084A (en) | Improvements in or relating to electron discharge devices | |
GB456991A (en) | Improvements in or relating to electron discharge devices | |
GB415403A (en) | Improvements in or relating to thermionic valve oscillators | |
GB537217A (en) | Electron beam discharge devices | |
GB500362A (en) | Improvements in or relating to electron discharge tubes | |
GB588817A (en) | Improvements relating to ultra short wave oscillators |