GB653946A - Improvements relating to circuit arrangements for stabilising the amplitude of electrical oscillations - Google Patents
Improvements relating to circuit arrangements for stabilising the amplitude of electrical oscillationsInfo
- Publication number
- GB653946A GB653946A GB2951348A GB2951348A GB653946A GB 653946 A GB653946 A GB 653946A GB 2951348 A GB2951348 A GB 2951348A GB 2951348 A GB2951348 A GB 2951348A GB 653946 A GB653946 A GB 653946A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- driving
- grid
- amplitude
- anode
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/38—Transmitter circuitry for the transmission of television signals according to analogue transmission standards
- H04N5/40—Modulation circuits
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
653,946. Valve amplifying circuits; valve modulating circuits. ELECTRIC & MUSICAL INDUSTRIES, Ltd.. Nov. 13, 1948, No. 29513. [Classes 40 (v) and 40 (vi)] A variable load is coupled to the output electrode of a driving valve so as to present a high impedance to the valve, which is driven to cut-off by the negative excursions of the input voltage applied between its control grid and cathode, and brought to such a low output impedance for positive excursions of the input that variations in the minimum potential at the output electrode are reduced and the amplitude of the potential variations applied to the load rendered more constant. As shown, radio frequency oscillations are applied. to a Class B or Class C amplifier 2 with a tuned anode circuit 5, which may be constructed as a line circuit. The output of the driving valve 2 is fed to the cathode of a grounded grid Class B or C amplifier 10 from a tap on the tuned circuit 5. Modulation signals are applied to the grid of the valve 10. The driving valve 2 is arranged to have very steep anode current/anode voltage characteristics, Fig. 2 (not shown), for low anode voltages and high grid voltages, and the modulated valve 10 is connected to present a high load impedance to the driving valve so that variations in the amplitude of the radio frequency drive fed to the modulated valve 10 are greatly reduced. Push-pull driving and modulated stages may be used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2951348A GB653946A (en) | 1948-11-13 | 1948-11-13 | Improvements relating to circuit arrangements for stabilising the amplitude of electrical oscillations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2951348A GB653946A (en) | 1948-11-13 | 1948-11-13 | Improvements relating to circuit arrangements for stabilising the amplitude of electrical oscillations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB653946A true GB653946A (en) | 1951-05-30 |
Family
ID=10292718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2951348A Expired GB653946A (en) | 1948-11-13 | 1948-11-13 | Improvements relating to circuit arrangements for stabilising the amplitude of electrical oscillations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB653946A (en) |
-
1948
- 1948-11-13 GB GB2951348A patent/GB653946A/en not_active Expired
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