GB1104791A - Improvements in or relating to time-bases - Google Patents
Improvements in or relating to time-basesInfo
- Publication number
- GB1104791A GB1104791A GB33875/63A GB3387563A GB1104791A GB 1104791 A GB1104791 A GB 1104791A GB 33875/63 A GB33875/63 A GB 33875/63A GB 3387563 A GB3387563 A GB 3387563A GB 1104791 A GB1104791 A GB 1104791A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- transductor
- coils
- tuned
- circuit
- 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
- H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
- H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
- H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
- H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
- H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
- H04N3/237—Distortion correction, e.g. for pincushion distortion correction, S-correction using passive elements, e.g. diodes
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
1,104,791. Cathode-ray tube circuits. MULLARD Ltd. 27 Nov., 1964 [27 Aug., 1963], No. 33875/63. Heading H4T. Relates to an electromagnetic frame deflection circuit for a cathode-ray tube (C.R.T.) with a rectangular raster, comprising deflection coils Lc and a transductor TD with a control winding Lw fed from a line-frequency signal source for varying the deflection current in coils Lc so as to effect " north-south " raster correction. According to the invention the transductor has a main winding Lv on its saturable core connected in parallel with coils Lc, means Ldc for biasing the core at an operating point within a substantially linear part of the transductor permeability characteristic, the signals fed to winding Lw have a substantially symmetrical curved waveform and constant amplitude, and a paralleltuned circuit A tuned substantially to the line frequency is inserted between the frame deflection current source and the parallel combination of coils Lv, Lc. The frame frequency current Ic amplitude-modulation envelope is linear, Fig. 2 (not shown). The C.R.T. may be a wide deflection angle monochrome, or a colour television " shadow-mask," tube. A second circuit, B, tuned to the line frequency, reflects a high impedance across winding Lw and the line frequency current in the latter is of sinusoidal form. The line frequency signal is taken from conventional boost capacitor Cb. A necessary 90 degrees phase-shift correction is afforded by network Rpl, Rp2, Rp3, Cp. The amplitude of modulation current is adjustable by resistors Rv, Rw. For greater transductor efficiency winding Lw may be series-tuned by a capacitor and that tuned circuit is driven by voltage fly-back pulses from a separate winding on the line output transformer, Fig. 7 (not shown).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB33875/63A GB1104791A (en) | 1963-08-27 | 1963-08-27 | Improvements in or relating to time-bases |
| NL6409672A NL6409672A (en) | 1963-08-27 | 1964-08-21 | |
| AT731264A AT246239B (en) | 1963-08-27 | 1964-08-24 | Circuit arrangement for the magnetic deflection of an electron beam |
| BE652326A BE652326A (en) | 1963-08-27 | 1964-08-26 | |
| FR986330A FR1405117A (en) | 1963-08-27 | 1964-08-27 | Circuit for the magnetic deflection of an electronic brush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB33875/63A GB1104791A (en) | 1963-08-27 | 1963-08-27 | Improvements in or relating to time-bases |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1104791A true GB1104791A (en) | 1968-02-28 |
Family
ID=10358591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33875/63A Expired GB1104791A (en) | 1963-08-27 | 1963-08-27 | Improvements in or relating to time-bases |
Country Status (5)
| Country | Link |
|---|---|
| AT (1) | AT246239B (en) |
| BE (1) | BE652326A (en) |
| FR (1) | FR1405117A (en) |
| GB (1) | GB1104791A (en) |
| NL (1) | NL6409672A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1307212A (en) * | 1969-03-03 | 1973-02-14 | Rca Corp | Waveform source for television receiver |
| DE2025094B2 (en) * | 1969-05-29 | 1971-11-04 | CIRCUIT ARRANGEMENT FOR GENERATING A LINE FREQUENCY SAW-TOOTH-SHAPED CORRECTION CURRENT WITH A GRID FREQUENTLY CHANGING AMPLITUDE IN A PICTURE REPLAY DEVICE |
-
1963
- 1963-08-27 GB GB33875/63A patent/GB1104791A/en not_active Expired
-
1964
- 1964-08-21 NL NL6409672A patent/NL6409672A/xx unknown
- 1964-08-24 AT AT731264A patent/AT246239B/en active
- 1964-08-26 BE BE652326A patent/BE652326A/xx unknown
- 1964-08-27 FR FR986330A patent/FR1405117A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT246239B (en) | 1966-04-12 |
| FR1405117A (en) | 1965-07-02 |
| BE652326A (en) | 1965-02-26 |
| NL6409672A (en) | 1965-03-01 |
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