GB871560A - Improved focus-correcting arrangements for electron beams - Google Patents
Improved focus-correcting arrangements for electron beamsInfo
- Publication number
- GB871560A GB871560A GB10652/60A GB1065260A GB871560A GB 871560 A GB871560 A GB 871560A GB 10652/60 A GB10652/60 A GB 10652/60A GB 1065260 A GB1065260 A GB 1065260A GB 871560 A GB871560 A GB 871560A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- focus correction
- march
- coil
- 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
- 238000010894 electron beam technology Methods 0.000 title 1
- 230000003534 oscillatory effect Effects 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
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
- H04N3/26—Modifications of scanning arrangements to improve focusing
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
871,560. Cathode-ray tube circuits. FERNSEH G.m.b.H. March 25, 1960 [March 28, 1959], No, 10652/60. Class 40(7) [Also in Group XL(b)] The focus correction coil 1 of a television camera tube is in an oscillatory circuit which is in series with a transistor 3 fed with line synchronizing pulses H; the transistor may be replaced by a semi-conductor diode having its cathode connected to the resonant circuit. Circuit 1, 2 is arranged to resonate at line frequency and the current waveform J in the coil is as shown in Fig. 2 for vertical focus correction an approximately parabolic voltage u is taken from the vertical deflexion generator and shaped by elements 8 . . . 11 to a substantially parabolic waveform which is applied to transistor 7. The focus correction coil is disposed between the neck of the camera tube and the deflexion coils to avoid cross-talk from the line flyback into the derived picture signal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE871560X | 1959-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB871560A true GB871560A (en) | 1961-06-28 |
Family
ID=6814439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10652/60A Expired GB871560A (en) | 1959-03-28 | 1960-03-25 | Improved focus-correcting arrangements for electron beams |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB871560A (en) |
-
1960
- 1960-03-25 GB GB10652/60A patent/GB871560A/en not_active Expired
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