GB457853A - Circuit for the synchronisation of television receivers by the transmitter - Google Patents
Circuit for the synchronisation of television receivers by the transmitterInfo
- Publication number
- GB457853A GB457853A GB16059/35A GB1605935A GB457853A GB 457853 A GB457853 A GB 457853A GB 16059/35 A GB16059/35 A GB 16059/35A GB 1605935 A GB1605935 A GB 1605935A GB 457853 A GB457853 A GB 457853A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signals
- bias
- circuit
- synchronizing
- june
- 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)
Abstract
457,853. Television. RADIOAKT.- GES. D. S. LOEWE, 10, Wiesenweg, Steglitz, Berlin. June 4, 1935, No. 16059. Convention date, June 6, 1934. [Classes 40 (iii) and 40 (v)] Synchronizing signals are separated from the picture signals by an amplitude filter comprising a gas-filled discharge tube 5, the bias on which is adjusted manually and automatically by the mean value of the synchronizing signals. The automatic adjustment of the bias is obtained by a high resistance 13 bridged by a condenser 12 which gives to the circuit a time constant greater than the period of several complete scannings. The tube 5 may have a heated cathode. The line and frame synchronizing signals are separated by resonant transformers or chokes 9, 10 tuned to the frequency of the signals and with their coils damped by resistances 14, 15. The transformers are so arranged that positive impulses are fed to the associated relaxation oscillators. The negative bias across the circuit 12, 13 is also used to control the grid bias of an amplifying-valve prior to the separation of the synchronizing-signals, Figs. 3 and 5 (not shown), or as an additional bias for the discharge tubes of the relaxation oscillators.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE457853X | 1934-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB457853A true GB457853A (en) | 1936-12-04 |
Family
ID=6539359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16059/35A Expired GB457853A (en) | 1934-06-06 | 1935-06-04 | Circuit for the synchronisation of television receivers by the transmitter |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR791201A (en) |
| GB (1) | GB457853A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE763072C (en) * | 1936-02-03 | 1952-06-05 | Marconi Wireless Telegraph Co | Feedback, intermittently self-locking oscillation generator with an RC element in the grid circle (blocking oscillator) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE742435C (en) * | 1938-12-25 | 1943-12-03 | Fernseh Gmbh | Arrangement for separating the line and picture change pulses of the same amplitude, but different duration and frequency, when watching television |
-
1935
- 1935-06-04 GB GB16059/35A patent/GB457853A/en not_active Expired
- 1935-06-05 FR FR791201D patent/FR791201A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE763072C (en) * | 1936-02-03 | 1952-06-05 | Marconi Wireless Telegraph Co | Feedback, intermittently self-locking oscillation generator with an RC element in the grid circle (blocking oscillator) |
Also Published As
| Publication number | Publication date |
|---|---|
| FR791201A (en) | 1935-12-06 |
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