GB451042A - Wireless reception of television transmissions, which are synchronised by signals differentiated by amplitude - Google Patents
Wireless reception of television transmissions, which are synchronised by signals differentiated by amplitudeInfo
- Publication number
- GB451042A GB451042A GB4281/35A GB428135A GB451042A GB 451042 A GB451042 A GB 451042A GB 4281/35 A GB4281/35 A GB 4281/35A GB 428135 A GB428135 A GB 428135A GB 451042 A GB451042 A GB 451042A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signals
- grid
- synchronizing signals
- amplifier
- amplitude
- 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
- H04N5/08—Separation of synchronising signals from picture signals
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Picture Signal Circuits (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
451,042. Television. RADIOAKT.- GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. Feb. 11, 1935, No. 4281. Convention date, Feb. 12, 1934. [Class 40 (iii)] Synchronizing signals of greater amplitude than the television signals are selectively amplified in an amplifying-valve 17 with a curved characteristic. The valve is connected immediately in front of the amplitude filter 13 selecting the synchronizing signals and after the detector of the image signals. The amplifier 17 and the filter may be combined in a single envelope. In the case of black synchronizing signals the amplifier uses a grid-current effect with the grid capacity 20 and leakage condenser 19 so designed as not to reduce the response to high frequencies. In the case of white synchronizing signals, the valves has a strong negative grid-bias in order to amplify positive signals better than negative ones. The exaggeration of the synchronizing signals may occur in the last detector or amplifier of the intermediate amplifier 11. To prevent opposite distortion in previous gain-controlled amplifiers, the regulating voltage is applied to screening- grids, or other grids beyond the controlling- grid, which operates at constant bias.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DER89887D DE726187C (en) | 1934-02-12 | 1934-02-12 | Arrangement for receiving television broadcasts in which the synchronizing pulses exceed the video content voltages in their amplitude |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB451042A true GB451042A (en) | 1936-07-29 |
Family
ID=6538469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4281/35A Expired GB451042A (en) | 1934-02-12 | 1935-02-11 | Wireless reception of television transmissions, which are synchronised by signals differentiated by amplitude |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2226993A (en) |
| DE (1) | DE726187C (en) |
| FR (1) | FR785474A (en) |
| GB (1) | GB451042A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE740117C (en) * | 1936-04-03 | 1943-10-12 | Telefunken Gmbh | Circuit arrangement for the production of steep impulses from impulses with rounded edges |
| DE931175C (en) * | 1952-02-21 | 1955-08-01 | Fernseh Gmbh | Pulse separator in televisions |
-
1934
- 1934-02-12 DE DER89887D patent/DE726187C/en not_active Expired
-
1935
- 1935-02-09 US US5872A patent/US2226993A/en not_active Expired - Lifetime
- 1935-02-11 FR FR785474D patent/FR785474A/en not_active Expired
- 1935-02-11 GB GB4281/35A patent/GB451042A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE726187C (en) | 1942-10-28 |
| US2226993A (en) | 1940-12-31 |
| FR785474A (en) | 1935-08-10 |
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