GB148131A - Improvements in and relating to the generation of high frequency oscillations - Google Patents
Improvements in and relating to the generation of high frequency oscillationsInfo
- Publication number
- GB148131A GB148131A GB20033/20A GB2003320A GB148131A GB 148131 A GB148131 A GB 148131A GB 20033/20 A GB20033/20 A GB 20033/20A GB 2003320 A GB2003320 A GB 2003320A GB 148131 A GB148131 A GB 148131A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- potential
- current
- negative
- valve
- 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
- 230000010355 oscillation Effects 0.000 title 1
- 230000007423 decrease 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
- H03B7/00—Generation of oscillations using active element having a negative resistance between two of its electrodes
- H03B7/02—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance
- H03B7/04—Generation of oscillations using active element having a negative resistance between two of its electrodes with frequency-determining element comprising lumped inductance and capacitance active element being vacuum tube
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Toys (AREA)
Abstract
148,131. British Thomson - Houston Co., (Assignees of White, W. C.). June 3, 1918, [Convention date]. Vacuum tubes.-Oscillations are produced by a three-electrode thermionic valve having a resonant grid circuit, by arranging that the grid current varies inversely as the grid voltage over the operating range of negative grid potential. The oscillator may be employed as a heterodyne receiver. Fig. 1 shows the valve so applied, and Fig. 2 shows the grid current, grid voltage characteristic. The grid circuit of the valve comprises an inductance 5 and variable condenser 6 in series, and the grid is given a normal negative potential by a battery 7 connected through choke-coils 8, 9. The negative resistance of the grid-filament path over the range BC is explained by the fact that an increase of negative potential on the grid decreases the plate current and so reduces the ionization of the residual gas, thereby reducing the grid current. A high plate potential, say 375 volts, is required to secure the desired result.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US237845A US1393594A (en) | 1918-06-03 | 1918-06-03 | Means for producing high-frequency oscillations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB148131A true GB148131A (en) | 1921-10-10 |
Family
ID=22895447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20033/20A Expired GB148131A (en) | 1918-06-03 | 1920-07-09 | Improvements in and relating to the generation of high frequency oscillations |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1393594A (en) |
| FR (1) | FR500292A (en) |
| GB (1) | GB148131A (en) |
-
1918
- 1918-06-03 US US237845A patent/US1393594A/en not_active Expired - Lifetime
-
1919
- 1919-06-02 FR FR500292A patent/FR500292A/en not_active Expired
-
1920
- 1920-07-09 GB GB20033/20A patent/GB148131A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR500292A (en) | 1920-03-06 |
| US1393594A (en) | 1921-10-11 |
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