GB490258A - Improvements in or relating to short wave thermionic valve circuit arrangements - Google Patents
Improvements in or relating to short wave thermionic valve circuit arrangementsInfo
- Publication number
- GB490258A GB490258A GB1194737A GB1194737A GB490258A GB 490258 A GB490258 A GB 490258A GB 1194737 A GB1194737 A GB 1194737A GB 1194737 A GB1194737 A GB 1194737A GB 490258 A GB490258 A GB 490258A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- parallel
- anode
- portions
- inductance
- 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
- 230000003472 neutralizing effect Effects 0.000 abstract 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
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
- H03F1/14—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means
- H03F1/16—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means in discharge-tube amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
- Microwave Tubes (AREA)
Abstract
490,258. Valve amplifying circuits. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. April 26, 1937, No. 11947. Convention date, April 24, 1936. [Class 40 (v)] In short-wave amplifiers operating in known capacity neutralized circuits, it is found that owing to the anode-cathode and anode-grid capacities being of the same order, the grid has an apparent low input resistance. This difficulty is overcome by dividing the anode circuit inductance into two portions, effectively in parallel as regards high frequency with gridanode and neutralizing capacities. The anode inductance is divided into two parallel portions I, II, the branch I being connected at the point M by a blocking condenser CB, which may be adjustable, to the grid G. The junction of the capacity voltage-divider CSP, CSP is earthed with the cathode K. The upper portion of coil I is in parallel (as regards high frequency) with the grid-anode capacity CAG and the lower portion is in parallel with the neutralizing condenser CN, and if the portions of the inductance are in the same ratio as their parallel capacities the grid shunting effect is reduced. The two portions of the inductance may be arranged to form a tuning variometer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET46814D DE678648C (en) | 1936-04-25 | 1936-04-25 | Anode neutralization circuit for short waves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB490258A true GB490258A (en) | 1938-08-11 |
Family
ID=25944574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1194737A Expired GB490258A (en) | 1936-04-25 | 1937-04-26 | Improvements in or relating to short wave thermionic valve circuit arrangements |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE678648C (en) |
| FR (1) | FR820967A (en) |
| GB (1) | GB490258A (en) |
-
1936
- 1936-04-25 DE DET46814D patent/DE678648C/en not_active Expired
-
1937
- 1937-04-23 FR FR820967D patent/FR820967A/en not_active Expired
- 1937-04-26 GB GB1194737A patent/GB490258A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE678648C (en) | 1939-07-21 |
| FR820967A (en) | 1937-11-24 |
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