GB1216713A - Improvements in or relating to eht generators - Google Patents
Improvements in or relating to eht generatorsInfo
- Publication number
- GB1216713A GB1216713A GB1108868A GB1108868A GB1216713A GB 1216713 A GB1216713 A GB 1216713A GB 1108868 A GB1108868 A GB 1108868A GB 1108868 A GB1108868 A GB 1108868A GB 1216713 A GB1216713 A GB 1216713A
- Authority
- GB
- United Kingdom
- Prior art keywords
- eht
- voltage
- valve
- grid
- transistor
- 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
- H04N3/18—Generation of supply voltages, in combination with electron beam deflecting
- H04N3/185—Maintaining dc voltage constant
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/33—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using discharge tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Details Of Television Scanning (AREA)
Abstract
1,216,713. EHT generation. TELEFUNKEN PATENTVERWERTUNGS G.m.b.H. 7 March, 1968 [7 March, 1967], No. 11088/68. Heading H2F. In an EHT supply for a cathode-ray tube of the type in which the current in an inductor is periodically interrupted by means of an electronic switch 7, controlled by a sawtooth waveform 17, the EHT voltage is stabilized by variation of the steep flank of the sawtooth wave 17. As shown, a line output valve 7 or transistor is periodically interrupted by a sawtooth voltage on the grid generated by the periodic charging and discharging of capacitor 6 via valve 1, overdriven by a sine wave 2 on the grid. The flyback pulses developed in winding 11 are rectified at 12 so as to provide the EHT voltage. An energy recovery circuit 9, 10 is provided. The EHT current is monitored by resistors 13, the flyback pulses being by-passed by diode 15, and after smoothing, applied to the base of transistor 16 so as to control the discharge current of capacitor 6 and hence the slope of the steep flank of the sawtooth voltage 17 fed to the grid of valve 7, so as to stabilize the EHT voltage against changes in load current. This action causes a corresponding change in the width of the flyback pulses so that if lower voltage flyback pulses are rectified for the production of focusing voltage, the ratio between EHT and focusing voltags remains contant. A positive-going control voltage + U1 is available if device 16 is replaced by a NPN transistor or thermionic valve. In Fig. 4 (not shown) transistor 16 is replaced by a thermionic valve, shunted by an inverse diode and connected in series with the grid of valve 7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1967T0033364 DE1266345B (en) | 1967-03-07 | 1967-03-07 | Circuit for regulating the high voltage of a cathode ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1216713A true GB1216713A (en) | 1970-12-23 |
Family
ID=7557713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1108868A Expired GB1216713A (en) | 1967-03-07 | 1968-03-07 | Improvements in or relating to eht generators |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1266345B (en) |
| GB (1) | GB1216713A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1029956B (en) * | 1954-02-15 | 1958-05-14 | Loewe Opta Ag | Arrangement for regulating the line width in line deflection generators |
-
1967
- 1967-03-07 DE DE1967T0033364 patent/DE1266345B/en active Pending
-
1968
- 1968-03-07 GB GB1108868A patent/GB1216713A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1266345B (en) | 1968-04-18 |
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