GB479760A - Improvements in or relating to television and like systems - Google Patents
Improvements in or relating to television and like systemsInfo
- Publication number
- GB479760A GB479760A GB2197036A GB2197036A GB479760A GB 479760 A GB479760 A GB 479760A GB 2197036 A GB2197036 A GB 2197036A GB 2197036 A GB2197036 A GB 2197036A GB 479760 A GB479760 A GB 479760A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- waveform
- coils
- rectangular
- saw
- 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
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass
- H03K6/04—Modifying slopes of pulses, e.g. S-correction
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
- H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
- H03K4/90—Linearisation of ramp; Synchronisation of pulses
Landscapes
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Details Of Television Scanning (AREA)
- Amplifiers (AREA)
Abstract
479,760. Valve generating circuits. BAIRD TELEVISION, Ltd., and JOHNSTONE, D. M. Aug. 10, 1936, No. 21970. [Class 40 (v)] The deflecting coils 2, Fig. 2, of a cathode-ray tube are connected in the cathode circuit of a valve 3 whose grid is fed with rectangular waveform potentials. This mode of connection reduces the valve impedance and improves the linearity of the saw-tooth waveform current in the coils 2. A further improvement may be obtained by applying to the grid of valve 3 a distorted saw-tooth waveform potential in addition to the rectangular waveform potential. This may be developed by applying rectangular waveform potentials to a resistance-inductance combination 10, 11, Fig. 3, the resulting waveform being limited by valve 12, phase reversed by valve 14 and if necessary limited again by the same valve and applied to valve 3, Fig. 2. Alternatively, the distorted saw-tooth waveform may be taken from the coils 2, Fig. 4, over condenser 17 and applied to the input of valve 3 over a limiting valve 16, the rectangular pulses being supplied over condenser 19.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2197036A GB479760A (en) | 1936-08-10 | 1936-08-10 | Improvements in or relating to television and like systems |
DEF83481D DE755231C (en) | 1936-08-10 | 1937-08-11 | Arrangement for generating time-proportional deflection currents |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2197036A GB479760A (en) | 1936-08-10 | 1936-08-10 | Improvements in or relating to television and like systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB479760A true GB479760A (en) | 1938-02-10 |
Family
ID=10171806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2197036A Expired GB479760A (en) | 1936-08-10 | 1936-08-10 | Improvements in or relating to television and like systems |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE755231C (en) |
GB (1) | GB479760A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE938851C (en) * | 1949-05-24 | 1956-02-09 | Rca Corp | Cathode ray deflector with autotransformer |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2137039A (en) * | 1931-06-17 | 1938-11-15 | Rca Corp | Method and apparatus for communication by television |
BE390958A (en) * | 1931-09-26 | |||
GB427901A (en) * | 1933-11-03 | 1935-05-02 | Emi Ltd | Improvements in and relating to television and the like transmission systems |
DE626932C (en) * | 1934-05-04 | 1936-03-05 | Philips Patentverwaltung | Circuit for regulating the frequency characteristic of low frequency amplifiers |
-
1936
- 1936-08-10 GB GB2197036A patent/GB479760A/en not_active Expired
-
1937
- 1937-08-11 DE DEF83481D patent/DE755231C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE938851C (en) * | 1949-05-24 | 1956-02-09 | Rca Corp | Cathode ray deflector with autotransformer |
Also Published As
Publication number | Publication date |
---|---|
DE755231C (en) | 1958-04-24 |
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