GB519743A - Improvements relating to amplifying systems - Google Patents
Improvements relating to amplifying systemsInfo
- Publication number
- GB519743A GB519743A GB2847938A GB2847938A GB519743A GB 519743 A GB519743 A GB 519743A GB 2847938 A GB2847938 A GB 2847938A GB 2847938 A GB2847938 A GB 2847938A GB 519743 A GB519743 A GB 519743A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- source
- valve
- frequency
- fluctuating
- 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
- 239000013642 negative control Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 230000011664 signaling Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/38—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers
- H03F3/40—DC amplifiers with modulator at input and demodulator at output; Modulators or demodulators specially adapted for use in such amplifiers with tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
519,743. Valve amplifying circuits. KOLSTER-BRANDES, Ltd., and CHATTERJEA, P. K. Sept. 30, 1938, No. 28479. [Class 40 (v)] An amplifier for slowly fluctuating unidirectional voltages comprises a valve with a source of alternating current applied to a negative control grid and connections for applying the fluctuating voltage to a second low potential control grid and means to rectify the output and select therefrom the direct current component with. its low frequency fluctuations. The Figure shows a frequency changing type of valve with a source S connected to the grid Gx1 ond the fluctuating voltage connected. to the grid Gx2. A delay voltage may be applied to the rectifier D to adjust'the sensitivity and the output, as shown, is selected by high and low pass filters HPF, LPF respectively. The source may be the local oscillator of a superheterodyne receiver at the fundamental or a harmonic frequency. The arrangement may be used to amplify automatic volume control voltages in a wireless receiver or to permit amplitude instead of frequency selection in multi-channel signalling or in connection with vibration tests.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2847938A GB519743A (en) | 1938-09-30 | 1938-09-30 | Improvements relating to amplifying systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2847938A GB519743A (en) | 1938-09-30 | 1938-09-30 | Improvements relating to amplifying systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB519743A true GB519743A (en) | 1940-04-04 |
Family
ID=10276286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2847938A Expired GB519743A (en) | 1938-09-30 | 1938-09-30 | Improvements relating to amplifying systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB519743A (en) |
-
1938
- 1938-09-30 GB GB2847938A patent/GB519743A/en not_active Expired
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