GB413390A - Improvements in or relating to thermionic valves and circuit arrangements incorporating the same - Google Patents
Improvements in or relating to thermionic valves and circuit arrangements incorporating the sameInfo
- Publication number
- GB413390A GB413390A GB2916/33A GB291633A GB413390A GB 413390 A GB413390 A GB 413390A GB 2916/33 A GB2916/33 A GB 2916/33A GB 291633 A GB291633 A GB 291633A GB 413390 A GB413390 A GB 413390A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- grid
- bias
- amplitude
- valves
- 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
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
Landscapes
- Amplifiers (AREA)
Abstract
413,390. Thermionic valves; circuits for wireless reception. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. Jan. 30, 1933, No. 2916. Convention date, Jan. 30, 1932. [Classes 39 (i) and 40 (v).] The grid-voltage anode-current characteristic of a thermionic valve is given a negative logarithmic shape (I p=-log c E g), over a working range of twenty or more volts grid bias, by varying the pitch or spacing of the grid as in the case of variable-mu valves. The valve is preferably of the screen-grid type. The Specification shows by mathematical analysis that if the bias of such a valve is varied proportionally to the input amplitude the output amplitude is constant; and that the distortion arising is constant throughout the working range and may be kept small. Fig. 4 shows an automatic volume control circuit employing the valve as a high-frequency amplifier H preceding a detector G. The bias on the grid of the valve H is varied in accordance with the amplitude of signals received on the aerial A by means of a resistance Q which is traversed by the plate current of a rectifier valve D fed from the aerial.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE413390X | 1932-01-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB413390A true GB413390A (en) | 1934-07-19 |
Family
ID=6442605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2916/33A Expired GB413390A (en) | 1932-01-30 | 1933-01-30 | Improvements in or relating to thermionic valves and circuit arrangements incorporating the same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB413390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2562476A (en) * | 1946-03-27 | 1951-07-31 | Hazeltine Research Inc | Amplifier arrangement |
-
1933
- 1933-01-30 GB GB2916/33A patent/GB413390A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2562476A (en) * | 1946-03-27 | 1951-07-31 | Hazeltine Research Inc | Amplifier arrangement |
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