GB875666A - Deflection system for cathode ray tubes - Google Patents
Deflection system for cathode ray tubesInfo
- Publication number
- GB875666A GB875666A GB172/58A GB17258A GB875666A GB 875666 A GB875666 A GB 875666A GB 172/58 A GB172/58 A GB 172/58A GB 17258 A GB17258 A GB 17258A GB 875666 A GB875666 A GB 875666A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ringing
- coils
- provides
- voltage
- deflection
- 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
875,666. Sawtooth generating circuits. PHILCO CORPORATION. Jan. 2, 1958 [Jan. 2, 1957(2)], No. 172/58. Class 40(6) In a cathode-ray tube deflection system, ringing current in the deflection coils 12 is minimized by providing a counteracting voltage in series with the damping tube 14 by means not forming part of the output transformer 11. Fig. 1 shows two closely coupled coils 16, 17 connected in series with the damping diode 14 of a line timebase circuit. The secondary coil 17 provides an antiphased ringing voltage to minimize ringing current in the deflection coils 12. The coils 16, 17 are tuned by a capacitor 19 which provides a phase balance. Resistor 18 provides amplitude balance. In Fig. 2, the transformer 20 is made selfresonant at the ringing frequency and feeds an antiphased ringing voltage to the low potential end of the deflection coils 12. This is effective at the beginning of the scan, but the ringing is damped out by the resistors 23, 24 during the later part.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US875666XA | 1957-01-02 | 1957-01-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB875666A true GB875666A (en) | 1961-08-23 |
Family
ID=22205937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB172/58A Expired GB875666A (en) | 1957-01-02 | 1958-01-02 | Deflection system for cathode ray tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB875666A (en) |
-
1958
- 1958-01-02 GB GB172/58A patent/GB875666A/en not_active Expired
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