GB780170A - Improvements in or relating to television receivers - Google Patents
Improvements in or relating to television receiversInfo
- Publication number
- GB780170A GB780170A GB3176554A GB3176554A GB780170A GB 780170 A GB780170 A GB 780170A GB 3176554 A GB3176554 A GB 3176554A GB 3176554 A GB3176554 A GB 3176554A GB 780170 A GB780170 A GB 780170A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pulses
- pulse
- valve
- line
- inductor
- 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
- H04N5/10—Separation of line synchronising signal from frame synchronising signal or vice versa
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Electronic Switches (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
780,170. Pulse discriminating circuits. KOLSTER-BRANDES, Ltd. Nov. 3, 1954, No. 31765/54. Class 40 (6). In a television circuit for separating frames synchronizing pulses from line pulses the mixed pulses are applied to a valve 1 having in its anode circuit an inductor 4 having a time constant at least as long as the frame pulses and connected in parallel with a rectifier 6 poled so as to carry part of the anode current of the valve, the voltage across the inductor being applied to a voltage clipper to obtain pulses coincident with the end of each frame pulse. The synchronizing pulses render the valve conducting and a current builds up in the inductor 4. At the end of the pulse the voltage at the anode of the valve swings positively to a value which is larger after a frame pulse than after the line pulse. Accordingly the frame pulses may be separated by the clipper. A second inductor 5 having a short time constant and in parallel with a reversely connected diode 7 produces a pulse at the point 10 when the line synchronizing pulses cause the valve to become conductive, accordingly line synchronizing pulses may be obtained from point 10. The diode 7 prevents a pulse of opposite polarity being produced at the end of the line pulses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3176554A GB780170A (en) | 1954-11-03 | 1954-11-03 | Improvements in or relating to television receivers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3176554A GB780170A (en) | 1954-11-03 | 1954-11-03 | Improvements in or relating to television receivers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB780170A true GB780170A (en) | 1957-07-31 |
Family
ID=10328067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3176554A Expired GB780170A (en) | 1954-11-03 | 1954-11-03 | Improvements in or relating to television receivers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB780170A (en) |
-
1954
- 1954-11-03 GB GB3176554A patent/GB780170A/en not_active Expired
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