GB857998A - Improvements in or relating to time-base circuits for magnetic beam deflection - Google Patents
Improvements in or relating to time-base circuits for magnetic beam deflectionInfo
- Publication number
- GB857998A GB857998A GB29956/59A GB2995659A GB857998A GB 857998 A GB857998 A GB 857998A GB 29956/59 A GB29956/59 A GB 29956/59A GB 2995659 A GB2995659 A GB 2995659A GB 857998 A GB857998 A GB 857998A
- Authority
- GB
- United Kingdom
- Prior art keywords
- capacitor
- voltage
- deflection coils
- driver
- valve
- 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
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Details Of Television Scanning (AREA)
Abstract
857,998. Valve sawtooth generator circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Sept. 2, 1959, No. 29956/59. Class 40(6). In a line time base generator of the type in which a driver valve feeds deflection coils through an output transformer, a capacitor is connected in series with the deflection coils and the transformer and the voltage across the capacitor is added to the D.C. voltage applied to the screen grid of the driver valve so that the screen voltage is higher at the ends of the scan than at the centre. In Fig. 2 the driver V1 feeds deflection coils Ld through an auto transformer, the circuit being provided with a damping diode V2 a boost capacitor Cb and a capacitor Cs in series with the deflection coils. A voltage is developed across the latter capacitor of parabolic form so that the waveform produced by the deflection coils is S-shaped to compensate for the flatness of the face of the tube. The capacitor voltage is also added to the screen grid voltage for the driver valve so that the screen voltage and dissipation is lowered during the middle part of the scan. The screens current flows through the upper part of the auto transformer winding and the deflection coils thus reducing the flux in the core and providing a field in the deflection coils which helps to centre the picture. The anode of the diode of V2 could alternatively be connected to the lower terminal of the capacitor Cs. It is stated that the flyback could intrude into the first part of the television picture signal period and the sawtooth produced could be shaped such that the first part of the picture is folded over, to reduce the load on the driver valve.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US25772D USRE25772E (en) | 1959-09-02 | Time-base circuit for magnetic beam deflection | |
| GB29956/59A GB857998A (en) | 1959-09-02 | 1959-09-02 | Improvements in or relating to time-base circuits for magnetic beam deflection |
| US51199A US3133228A (en) | 1959-09-02 | 1960-08-22 | Time-base circuit for magnetic beam deflection |
| DEN18832A DE1134105B (en) | 1959-09-02 | 1960-08-30 | Circuit arrangement for better utilization of the power output of the end tubes of a line deflection circuit for a television display tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB29956/59A GB857998A (en) | 1959-09-02 | 1959-09-02 | Improvements in or relating to time-base circuits for magnetic beam deflection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB857998A true GB857998A (en) | 1961-01-04 |
Family
ID=10299935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29956/59A Expired GB857998A (en) | 1959-09-02 | 1959-09-02 | Improvements in or relating to time-base circuits for magnetic beam deflection |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US3133228A (en) |
| DE (1) | DE1134105B (en) |
| GB (1) | GB857998A (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2599798A (en) * | 1950-01-13 | 1952-06-10 | Avco Mfg Corp | Linearity control circuit for television receivers |
| NL180851C (en) * | 1952-08-26 | Thomae Gmbh Dr K | PROCESS FOR PREPARING A HAND WASHING PASTE. | |
| US2743382A (en) * | 1954-03-26 | 1956-04-24 | Rca Corp | Deflection circuits |
| DE1038130B (en) * | 1956-12-15 | 1958-09-04 | Telefunken Gmbh | Anode voltage supply circuit for a television cathode ray tube with a circuit arrangement for generating a saw-tooth-shaped current in an inductance |
-
0
- US US25772D patent/USRE25772E/en not_active Expired
-
1959
- 1959-09-02 GB GB29956/59A patent/GB857998A/en not_active Expired
-
1960
- 1960-08-22 US US51199A patent/US3133228A/en not_active Expired - Lifetime
- 1960-08-30 DE DEN18832A patent/DE1134105B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3133228A (en) | 1964-05-12 |
| USRE25772E (en) | 1965-05-04 |
| DE1134105B (en) | 1962-08-02 |
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