GB380827A - Improvements in or relating to amplifying or detecting circuits employing a screenedvalve - Google Patents
Improvements in or relating to amplifying or detecting circuits employing a screenedvalveInfo
- Publication number
- GB380827A GB380827A GB1148931A GB1148931A GB380827A GB 380827 A GB380827 A GB 380827A GB 1148931 A GB1148931 A GB 1148931A GB 1148931 A GB1148931 A GB 1148931A GB 380827 A GB380827 A GB 380827A
- Authority
- GB
- United Kingdom
- Prior art keywords
- anode
- grid
- screen
- ohms
- volts
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/82—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
Landscapes
- Amplifiers (AREA)
Abstract
380,827. Thermionic valves. GRAMOPHONE CO., Ltd., Hayes,and BULL, C. S., 33, Micawber Avenue, Hillingdon, both in Middlesex. April 17, 1931, No. 11489. Drawings to Specification. [Class 39 (i).] In circuits for amplifying radio and audio frequencies or for detecting and particularly in power output stages, distortion due to secondary emission from the anode of a screenedgrid valve when the anode voltage swings below the screen-grid voltage is avoided by biasing this grid to a positive potential with respect to the cathode equal to or less than the critical anode-cathode potential, usually 30-40 volts, below which the liberation of secondary electrons from the anode is negligible. As normal screen-grid valves so operated have a very high impedance, the electrodes are constructed and arranged to give an impedance of 500,000 ohms or less, preferably 50000-100,000 ohms, under the operating conditions, details of a valve with control and screen grids of wider mesh than usual being specified. The anode-cathode impedance may be less than 200,000 ohms with positive potentials of 120 volts and 40 volts on the anode and screen grid respectively, and with 1 volt negative on the control grid. Resistance or transformer couplings may be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1148931A GB380827A (en) | 1931-04-17 | 1931-04-17 | Improvements in or relating to amplifying or detecting circuits employing a screenedvalve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1148931A GB380827A (en) | 1931-04-17 | 1931-04-17 | Improvements in or relating to amplifying or detecting circuits employing a screenedvalve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB380827A true GB380827A (en) | 1932-09-19 |
Family
ID=9987194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1148931A Expired GB380827A (en) | 1931-04-17 | 1931-04-17 | Improvements in or relating to amplifying or detecting circuits employing a screenedvalve |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB380827A (en) |
-
1931
- 1931-04-17 GB GB1148931A patent/GB380827A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB380827A (en) | Improvements in or relating to amplifying or detecting circuits employing a screenedvalve | |
| GB499487A (en) | Improvements in or relating to electron discharge devices for voltage amplification or control | |
| GB467915A (en) | Improvements in or relating to electron discharge devices and to circuits therefor | |
| GB433545A (en) | Improvements in and relating to automatic stabilisation for electrical circuit arrangements using a gas discharge tube as an intervalve coupling | |
| GB380024A (en) | Improvements in thermionic amplifiers | |
| GB531827A (en) | Improvements in or relating to electron discharge valve amplifiers | |
| GB645936A (en) | Improvements in or relating to high-frequency electric receivers and amplifiers | |
| GB440612A (en) | Improvements in or relating to electron discharge device amplifiers | |
| GB668436A (en) | Improvements in and relating to electron discharge amplifiers | |
| GB406744A (en) | Improvements relating to circuits including thermionic valves for the amplification of electric signals | |
| GB487674A (en) | Improvements in or relating to electron discharge devices | |
| GB452790A (en) | Improvements in or relating to electron discharge device circuit arrangements | |
| GB361834A (en) | Improvements relating to the application of bias to an electrode of a thermionic valve | |
| GB407398A (en) | Improvements in or connected with amplifying circuits employing thermionic valves | |
| GB609845A (en) | Improvements in or relating to circuits for electric discharge tubes | |
| GB490265A (en) | Improvements in valve amplifiers comprising a secondary emission electron multiplier | |
| GB393318A (en) | Improvements in or relating to thermionic amplifiers | |
| GB346443A (en) | Improvements in thermionic valve circuits | |
| GB451661A (en) | Improvements in circuit arrangements for vacuum tubes | |
| GB230028A (en) | Improvements in electron discharge apparatus and methods of operating the same | |
| GB299505A (en) | Improvements in or relating to thermionic valves | |
| GB347291A (en) | Improvements in or relating to thermionic valve systems | |
| GB414359A (en) | Improvements in or relating to means of correcting distortion of electric signals byamplifiers | |
| GB390688A (en) | Improvements in or relating to amplifier circuit arrangements employing space discharge amplifier devices | |
| GB397612A (en) | Two-stage thermionic valve |