GB493279A - Improvements in or relating to television and like systems - Google Patents
Improvements in or relating to television and like systemsInfo
- Publication number
- GB493279A GB493279A GB500037A GB500037A GB493279A GB 493279 A GB493279 A GB 493279A GB 500037 A GB500037 A GB 500037A GB 500037 A GB500037 A GB 500037A GB 493279 A GB493279 A GB 493279A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- pulse
- picture
- circuit
- television
- 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
- H04N5/04—Synchronising
- H04N5/06—Generation of synchronising signals
- H04N5/067—Arrangements or circuits at the transmitter end
- H04N5/0675—Arrangements or circuits at the transmitter end for mixing the synchronising signals with the picture signal or mutually
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
493,279. Television transmitters; valve circuits. BAIRD TELEVISION, Ltd., and NUTTALL, T. C. Jan. 20, 1938, No. 5000. [Classes 40 (iii) and 40 (v)] Synchronizing pulses are inserted in picture signals by a circuit comprising a valve 1 amplifying the picture signals and a secondary emitting valve 12 fed with a constant or slowly varying voltage on its grid, both valves being rendered nonconducting by a pulse from a source 10 applied across the common cathode resistance 11, and the anode current of valve 1 being combined with the current in the secondary emitting electrode circuit of valve 12. As the result of the secondary emission, the two currents are out of phase, so that the gap produced in the picture signals is precisely filled by an inverse pulse of predetermined amplitude. The circuit may also be used to mask out part of the picture and the inserted pulse may have an amplitude dependent on the picture signal amplitude to reinsert direct current components.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB500037A GB493279A (en) | 1938-01-20 | 1938-01-20 | Improvements in or relating to television and like systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB500037A GB493279A (en) | 1938-01-20 | 1938-01-20 | Improvements in or relating to television and like systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB493279A true GB493279A (en) | 1938-10-06 |
Family
ID=9787831
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB500037A Expired GB493279A (en) | 1938-01-20 | 1938-01-20 | Improvements in or relating to television and like systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB493279A (en) |
-
1938
- 1938-01-20 GB GB500037A patent/GB493279A/en not_active Expired
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