GB471398A - Improvements in or relating to high-frequency amplifying systems - Google Patents
Improvements in or relating to high-frequency amplifying systemsInfo
- Publication number
- GB471398A GB471398A GB28036/36A GB2803636A GB471398A GB 471398 A GB471398 A GB 471398A GB 28036/36 A GB28036/36 A GB 28036/36A GB 2803636 A GB2803636 A GB 2803636A GB 471398 A GB471398 A GB 471398A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- resistance
- gain
- varied
- grid
- 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
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
471,398. Valve circuits. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Oct. 15, 1936, No. 28036. Convention date, Oct. 18, 1935. Drawings to Specification. [Classes 39 (i) and 40 (v)] A resistance is connected regeneratively in series with the cathode of an ultra-highfrequency tuned amplifier in order to neutralize variation of selectivity, due to the electron transit time, when the gain is varied by adjusting the grid bias. The amplifier in the absence of such correction behaves as if the cathode and control grid were connected by a resistance whose value varies with the gain, so that when the gain is varied by varying the grid bias, the damping and consequently the selectivity are varied correspondingly. According to the invention a resistance connected in series with the cathode is so dimensioned as to neutralize this effect. The added resistance is a function of the internal capacity between grid and cathode and of the transit time of the electrodes it may also take account of the capacity between the cathode and heater. The resistance in question may be incorporated in the valve.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE471398X | 1935-10-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB471398A true GB471398A (en) | 1937-09-03 |
Family
ID=6541263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB28036/36A Expired GB471398A (en) | 1935-10-18 | 1936-10-15 | Improvements in or relating to high-frequency amplifying systems |
Country Status (5)
Country | Link |
---|---|
US (1) | US2212851A (en) |
BE (1) | BE417947A (en) |
FR (1) | FR811888A (en) |
GB (1) | GB471398A (en) |
NL (1) | NL50266C (en) |
-
0
- BE BE417947D patent/BE417947A/xx unknown
- NL NL50266D patent/NL50266C/xx active
-
1936
- 1936-09-26 US US102727A patent/US2212851A/en not_active Expired - Lifetime
- 1936-10-15 GB GB28036/36A patent/GB471398A/en not_active Expired
- 1936-10-16 FR FR811888D patent/FR811888A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR811888A (en) | 1937-04-24 |
NL50266C (en) | |
US2212851A (en) | 1940-08-27 |
BE417947A (en) |
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