GB466930A - An improved generator of synchronising impulses for television and the like - Google Patents
An improved generator of synchronising impulses for television and the likeInfo
- Publication number
- GB466930A GB466930A GB20885/36A GB2088536A GB466930A GB 466930 A GB466930 A GB 466930A GB 20885/36 A GB20885/36 A GB 20885/36A GB 2088536 A GB2088536 A GB 2088536A GB 466930 A GB466930 A GB 466930A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- controlling
- coupling
- potential
- impulses
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
466,930. Television. RADIOAKT.-GES. D. S. LOEWE. July 28, 1936, No. 20885. Convention date, July 29, 1935. [Classes 40 (iii) and 40 (v)] Frequencies, which are integral multiples of the desired frequencies, control the production of two groups of synchronizing signals of different frequency by two generators Tx, Ty, each of which has its own current supply Nx, Ny and is connected to a screening-grid or five-electrode amplifying-valve 19x, 19y which is free of reaction. The generators, which are of the type described in Specification 459,602, pass positive impulses to the amplifier through a grid-current limiting resistance 22x, 22y. The discharge of the generating-circuit takes longer than a period of the controlling frequency and a potentiometer 26 adjusts the amplitude of the controlling- frequency and thus the frequency of the impulses. A part of the controlling-potential of the generator Tx of higher frequency is superposed on the controlling-potential of the lower-frequency generator Ty by a coupling 33, 34, which may be disconnected at 35, and the low-frequency controlling potential is freed from harmonics by a low-pass filter 30, 31. For interlaced scanning a first harmonic of the line frequency is passed through this coupling to control the image-change frequency. A resistance 36 keeps the line frequency from the coupling. Specification 423,394 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER93911D DE746966C (en) | 1935-07-29 | 1935-07-29 | Method for generating the mixture of line and line train pulses for interlaced television broadcasts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB466930A true GB466930A (en) | 1937-06-08 |
Family
ID=6540619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20885/36A Expired GB466930A (en) | 1935-07-29 | 1936-07-28 | An improved generator of synchronising impulses for television and the like |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2185131A (en) |
| DE (1) | DE746966C (en) |
| FR (1) | FR810065A (en) |
| GB (1) | GB466930A (en) |
| NL (1) | NL56590C (en) |
-
0
- NL NL56590D patent/NL56590C/xx active
-
1935
- 1935-07-29 DE DER93911D patent/DE746966C/en not_active Expired
-
1936
- 1936-07-23 US US92154A patent/US2185131A/en not_active Expired - Lifetime
- 1936-07-28 FR FR810065D patent/FR810065A/en not_active Expired
- 1936-07-28 GB GB20885/36A patent/GB466930A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2185131A (en) | 1939-12-26 |
| NL56590C (en) | |
| DE746966C (en) | 1944-12-27 |
| FR810065A (en) | 1937-03-15 |
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