GB171520A - Improvements in and relating to the production and modulation of electrical oscillations by means of thermionic valves - Google Patents
Improvements in and relating to the production and modulation of electrical oscillations by means of thermionic valvesInfo
- Publication number
- GB171520A GB171520A GB2537820A GB2537820A GB171520A GB 171520 A GB171520 A GB 171520A GB 2537820 A GB2537820 A GB 2537820A GB 2537820 A GB2537820 A GB 2537820A GB 171520 A GB171520 A GB 171520A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- coil
- oscillations
- circuit
- modulation
- 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
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes
- H03C1/18—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid
- H03C1/22—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to same grid
Landscapes
- Amplifiers (AREA)
Abstract
171,520. Radio Communication Co., Ltd., and Lea, N. Sept. 2, 1920. Thermionic modulating systems.-In a method of controlling or modulating, the grid circuit of a valve generator is shunted by a rectifier such as a two-electrode valve with its anode potential con. trollable by a microphone, currents through the rectifier being passed back inductively into the grid circuit so as to oppose the original oscillations therein. In an example, Fig. 2, a generator valve V1 has its output controlled by oscillations of variable amplitude induced in the coil L3 in its grid circuit from the coil L4. Oscillations in the coil L4 are varied by being passed through a valve V2, the conductivity of which is varied microphonically. The coil L5 is wound on the coil L2 and is similar to it and merely excludes the microphone transformer T from the oscillation circuit. According to the Provisional Specification, the valve V2 may have three electrodes, and the opposing oscillations may be obtained from the output circuit of the valve V1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2537820A GB171520A (en) | 1920-09-02 | 1920-09-02 | Improvements in and relating to the production and modulation of electrical oscillations by means of thermionic valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2537820A GB171520A (en) | 1920-09-02 | 1920-09-02 | Improvements in and relating to the production and modulation of electrical oscillations by means of thermionic valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB171520A true GB171520A (en) | 1921-11-24 |
Family
ID=10226688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2537820A Expired GB171520A (en) | 1920-09-02 | 1920-09-02 | Improvements in and relating to the production and modulation of electrical oscillations by means of thermionic valves |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB171520A (en) |
-
1920
- 1920-09-02 GB GB2537820A patent/GB171520A/en not_active Expired
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