GB1531009A - Television receiver line output stages - Google Patents

Television receiver line output stages

Info

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
Application number
GB48537/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Communications Patents Ltd
Original Assignee
Communications Patents Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Communications Patents Ltd filed Critical Communications Patents Ltd
Priority to GB48537/75A priority Critical patent/GB1531009A/en
Priority to ZA766983A priority patent/ZA766983B/en
Priority to AU19977/76A priority patent/AU503806B2/en
Priority to PT65888A priority patent/PT65888B/en
Publication of GB1531009A publication Critical patent/GB1531009A/en
Expired legal-status Critical Current

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.
GB48537/75A 1975-11-26 1975-11-26 Television receiver line output stages Expired GB1531009A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457614A1 (en) * 1979-05-24 1980-12-19 Rca Corp DEVICE CIRCUIT WITH SPOT RETURN CONTROL

Cited By (1)

* Cited by examiner, † Cited by third party
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