GB595285A - Ultra high frequency communication systems - Google Patents
Ultra high frequency communication systemsInfo
- Publication number
- GB595285A GB595285A GB12365/45A GB1236545A GB595285A GB 595285 A GB595285 A GB 595285A GB 12365/45 A GB12365/45 A GB 12365/45A GB 1236545 A GB1236545 A GB 1236545A GB 595285 A GB595285 A GB 595285A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- oscillator
- signal
- pulse
- pulses
- 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
- 230000000903 blocking effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
Landscapes
- Circuits Of Receivers In General (AREA)
- Transmitters (AREA)
Abstract
595,285. Pulse modulation. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. May 16, 1945, No. 12365. Convention date, April 22, 1942. [Class 40 (v)] A pulse radio communication system utilizes a blocking oscillator as the carrier source, the timing of the pulses being varied by applying the signal voltage to vary the resistance of a leak path for the grid condenser. The oscillator may comprise a push-pull valve pair 1, 2 with resonant Lines as their anode, grid and cathode circuits. The grid condenser 12 is connected between the tuning-sliders 8, 11 of the grid and cathode circuits and the leak path comprises a triode valve 13 with its anode connected to the positive terminal B + of the high-tension source. The signal is applied to the grid of the valve 13 through a transformer 14. With no signal, the oscillator gives regular pulses of carrier energy, the spacing of which is determined by the leak path for the condenser 12. As the resistance of this path is varied by the signal, the spacing of the carrier pulses is correspondingly varied. The anode potential of the oscillator may be of high value, and the power developed during pulse emission may be much greater than the continuous power rating of the valves. The receiver may be provided with automatic gain control which may bias off all but the pulse peaks so as to eliminate noise.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US439964A US2407860A (en) | 1942-04-22 | 1942-04-22 | Communication system for ultrahigh frequencies |
Publications (1)
Publication Number | Publication Date |
---|---|
GB595285A true GB595285A (en) | 1947-12-01 |
Family
ID=23746854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12365/45A Expired GB595285A (en) | 1942-04-22 | 1945-05-16 | Ultra high frequency communication systems |
Country Status (2)
Country | Link |
---|---|
US (1) | US2407860A (en) |
GB (1) | GB595285A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2470698A (en) * | 1940-11-29 | 1949-05-17 | Rca Corp | Pulse modulation signaling system |
US2887663A (en) * | 1954-03-25 | 1959-05-19 | Itt | Frequency modulating system |
-
1942
- 1942-04-22 US US439964A patent/US2407860A/en not_active Expired - Lifetime
-
1945
- 1945-05-16 GB GB12365/45A patent/GB595285A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2407860A (en) | 1946-09-17 |
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