GB496119A - Improvements in or relating to television and like transmitting systems - Google Patents
Improvements in or relating to television and like transmitting systemsInfo
- Publication number
- GB496119A GB496119A GB1160737A GB1160737A GB496119A GB 496119 A GB496119 A GB 496119A GB 1160737 A GB1160737 A GB 1160737A GB 1160737 A GB1160737 A GB 1160737A GB 496119 A GB496119 A GB 496119A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- pulse
- starting
- stopping
- delay
- 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)
- Pulse Circuits (AREA)
Abstract
496,119. Valve circuits. WHITE, E. L. C. April 23, 1937, No. 11607. [Class 40 (v)] An impulse generator is started and stopped by control impulses, the starting and stopping pulses originating from a single signal passing along a delay network. In Fig. 1, valve 1 of a multivibrator is started into operation when a pulse passing through delay network 11 reaches tapping 13 and is stopped when the same pulse reaches tapping 16, a square topped wave of the duration determined by tappings 13, 16 being generated and fed to output terminals 20, 21. Instead of a single delay network two delay networks coupled by an amplifier or buffer stage may be used. Alternatively separate delay networks for the starting and stopping pulses may be used as shown in Fig. 3. In this embodiment the discharge through hexode 30 is controlled by pulses applied to grids g<1> and g<3>. Normally grid g<1> is biassed to cut off. The control pulses must be of longer duration than the output pulses required. When the starting pulse is received grid g<1> allows current to pass and when the stopping pulse is received grid g<3> is biassed to cut-off so that current reaches output terminal 42 during the interval between the two pulses. If the control pulses are of saw tooth form the duration of the controlled pulse can be varied by altering the biasses on grids g<1> and g<3>. The invention is described for generating synchronizing pulses for television. Specifications 456,650 and 456,840 are referred to.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1160737A GB496119A (en) | 1937-04-23 | 1937-04-23 | Improvements in or relating to television and like transmitting systems |
FR836250D FR836250A (en) | 1937-04-23 | 1938-04-06 | Improvements to transmitting systems for television or similar |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1160737A GB496119A (en) | 1937-04-23 | 1937-04-23 | Improvements in or relating to television and like transmitting systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB496119A true GB496119A (en) | 1938-11-23 |
Family
ID=9989347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1160737A Expired GB496119A (en) | 1937-04-23 | 1937-04-23 | Improvements in or relating to television and like transmitting systems |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR836250A (en) |
GB (1) | GB496119A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE961809C (en) * | 1941-07-08 | 1957-04-11 | Int Standard Electric Corp | Multivibrator |
-
1937
- 1937-04-23 GB GB1160737A patent/GB496119A/en not_active Expired
-
1938
- 1938-04-06 FR FR836250D patent/FR836250A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE961809C (en) * | 1941-07-08 | 1957-04-11 | Int Standard Electric Corp | Multivibrator |
Also Published As
Publication number | Publication date |
---|---|
FR836250A (en) | 1939-01-12 |
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