GB552650A - Improvements in or relating to neutralised high-frequency amplifiers - Google Patents
Improvements in or relating to neutralised high-frequency amplifiersInfo
- Publication number
- GB552650A GB552650A GB1322941A GB1322941A GB552650A GB 552650 A GB552650 A GB 552650A GB 1322941 A GB1322941 A GB 1322941A GB 1322941 A GB1322941 A GB 1322941A GB 552650 A GB552650 A GB 552650A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- valve
- input circuit
- caf
- cag
- 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)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
552,650. Valve amplifying circuits. PHILIPS LAMPS, Ltd. (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). Oct. 14, 1941, No. 13229. [Class 40 (v)] In a neutralized high frequency amplifier for short waves the lead connecting the cathodes is as short as possible and the input circuit is connected to such points in the leads connecting the neutralizing condensers to the grids that the ratio of the inductances in the grid and cathode circuits is equal to the ratio of the anode-cathode to anode-grid capacities of the valve. Fig. 3 shows the arrangement and Fig. 4 a substitution diagram. The neutrodyne condensers Cn are so adjusted that 1/w Cag : (w Ln-1/w Cn) = 1 /w Caf : (wLf-1/w Caf) which ensures that a voltage across the output circuit II does not produce voltage across G, F1 and G, F2 respectively. The input circuit I is connected to points P1 P, so chosen that Lg1 P, : ¢ Lf= 1 /Cag in which Lg1 P1 represents the inductance between the grid and the point P, so that the input circuit is not affected by voltages across the output circuit II. A valve with two connections to the input grid may be used. Specification 383,545 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1322941A GB552650A (en) | 1941-10-14 | 1941-10-14 | Improvements in or relating to neutralised high-frequency amplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1322941A GB552650A (en) | 1941-10-14 | 1941-10-14 | Improvements in or relating to neutralised high-frequency amplifiers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB552650A true GB552650A (en) | 1943-04-19 |
Family
ID=10019186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1322941A Expired GB552650A (en) | 1941-10-14 | 1941-10-14 | Improvements in or relating to neutralised high-frequency amplifiers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB552650A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2477545A (en) * | 1940-06-14 | 1949-07-26 | Hartford Nat Bank & Trust Co | Neutralized high-frequency amplifier |
-
1941
- 1941-10-14 GB GB1322941A patent/GB552650A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2477545A (en) * | 1940-06-14 | 1949-07-26 | Hartford Nat Bank & Trust Co | Neutralized high-frequency amplifier |
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