GB1531009A - Television receiver line output stages - Google Patents
Television receiver line output stagesInfo
- Publication number
- GB1531009A GB1531009A GB48537/75A GB4853775A GB1531009A GB 1531009 A GB1531009 A GB 1531009A GB 48537/75 A GB48537/75 A GB 48537/75A GB 4853775 A GB4853775 A GB 4853775A GB 1531009 A GB1531009 A GB 1531009A
- Authority
- GB
- United Kingdom
- Prior art keywords
- eht
- flyback
- line output
- capacitor
- transformer
- 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
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
- H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
- H03K4/48—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices
- H03K4/60—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor
- H03K4/62—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements semiconductor devices in which a sawtooth current is produced through an inductor using a semiconductor device operating as a switching device
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Details Of Television Scanning (AREA)
Abstract
1531009 CRT line output circuits COMMUNICATIONS PATENTS Ltd 17 Nov 1976 [26 Nov 1975] 48537/75 Heading H4T A TV receiver line output stage includes a line transformer 1, means 6 for drawing an EHT supply from the transformer, and means for controlling the flyback time to regulate the EHT. The regulation circuit includes a capacitor 9 which, during the rising positive part of the flyback, is coupled across a winding 10 of the transformer by the forwardly-biased diode 11. This slows down the flyback whereby the EHT is reduced. If, during a scan period, the capacitor 9 discharges through resistor 12 and transistor pair 13, then on subsequent cycles the flyback will be slower and the EHT reduced. The transistor pair is normally held conducting by the base current through resistors 14, 15. If the beam current increases, the EHT is reduced, causing a negative charge to build up on capacitor 8. The resulting current through resistor 7 reduces the base current in the transistor pair, thereby increasing the EHT.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB48537/75A GB1531009A (en) | 1975-11-26 | 1975-11-26 | Television receiver line output stages |
ZA766983A ZA766983B (en) | 1975-11-26 | 1976-11-23 | Improvements in or relating to television receiver line output stages |
AU19977/76A AU503806B2 (en) | 1975-11-26 | 1976-11-24 | Television receiver line output stage |
PT65888A PT65888B (en) | 1975-11-26 | 1976-11-25 | Improvements in television receiver line out put stages |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB48537/75A GB1531009A (en) | 1975-11-26 | 1975-11-26 | Television receiver line output stages |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1531009A true GB1531009A (en) | 1978-11-01 |
Family
ID=10448973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB48537/75A Expired GB1531009A (en) | 1975-11-26 | 1975-11-26 | Television receiver line output stages |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU503806B2 (en) |
GB (1) | GB1531009A (en) |
PT (1) | PT65888B (en) |
ZA (1) | ZA766983B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2457614A1 (en) * | 1979-05-24 | 1980-12-19 | Rca Corp | DEVICE CIRCUIT WITH SPOT RETURN CONTROL |
-
1975
- 1975-11-26 GB GB48537/75A patent/GB1531009A/en not_active Expired
-
1976
- 1976-11-23 ZA ZA766983A patent/ZA766983B/en unknown
- 1976-11-24 AU AU19977/76A patent/AU503806B2/en not_active Expired
- 1976-11-25 PT PT65888A patent/PT65888B/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2457614A1 (en) * | 1979-05-24 | 1980-12-19 | Rca Corp | DEVICE CIRCUIT WITH SPOT RETURN CONTROL |
Also Published As
Publication number | Publication date |
---|---|
AU503806B2 (en) | 1979-09-20 |
PT65888B (en) | 1978-05-18 |
PT65888A (en) | 1976-12-01 |
ZA766983B (en) | 1977-10-26 |
AU1997776A (en) | 1978-06-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |