GB315663A - Means for obtaining selective reception of radio and like signals - Google Patents
Means for obtaining selective reception of radio and like signalsInfo
- Publication number
- GB315663A GB315663A GB21721/29A GB2172129A GB315663A GB 315663 A GB315663 A GB 315663A GB 21721/29 A GB21721/29 A GB 21721/29A GB 2172129 A GB2172129 A GB 2172129A GB 315663 A GB315663 A GB 315663A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- resistance
- aerial
- valve
- capacity
- 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
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H2/00—Networks using elements or techniques not provided for in groups H03H3/00 - H03H21/00
- H03H2/005—Coupling circuits between transmission lines or antennas and transmitters, receivers or amplifiers
- H03H2/008—Receiver or amplifier input circuits
Landscapes
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Amplifiers (AREA)
Abstract
315,663. Ardenne, M. von. July 14, 1928, [Convention date]. Thermionic amplifiers.-To increase the selectivity of a tuned input circuit (such as a frame aerial) connected to an aperiodic amplifier, the damping effect of the apparent grid resistance of the first valve (due to reflex action from its plate circuit) is minimized by inserting a large series resistance Rg, Fig. 2, or a small series condenser C, Fig. 3, between the input circuit and the grid. By this means the apparent resistance R1 which is represented in dotted lines on Figs. 2 and 3 carries only a small fraction of the aerial current and consequently has a minimum damping effect. The cascade of resistance-coupled amplifiers is designed to have low amplification for disturbing low-frequency currents, such as may be picked up by the aerial or fed to the valves with the supply current. When a condenser C is employed its capacity is of the same order as the grid capacity of the first valve, and grid bias is applied through a grid leak R2.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE315663X | 1928-07-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB315663A true GB315663A (en) | 1930-10-15 |
Family
ID=6150246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21721/29A Expired GB315663A (en) | 1928-07-14 | 1929-07-15 | Means for obtaining selective reception of radio and like signals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB315663A (en) |
-
1929
- 1929-07-15 GB GB21721/29A patent/GB315663A/en not_active Expired
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