GB1273120A - Television line timebase circuits - Google Patents

Television line timebase circuits

Info

Publication number
GB1273120A
GB1273120A GB403271A GB403271A GB1273120A GB 1273120 A GB1273120 A GB 1273120A GB 403271 A GB403271 A GB 403271A GB 403271 A GB403271 A GB 403271A GB 1273120 A GB1273120 A GB 1273120A
Authority
GB
United Kingdom
Prior art keywords
supply
derived
mains
line
base
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
GB403271A
Inventor
Brian Robert Carpenter
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.)
Pye Electronic Products Ltd
Original Assignee
Pye 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 Pye Ltd filed Critical Pye Ltd
Priority to GB403271A priority Critical patent/GB1273120A/en
Publication of GB1273120A publication Critical patent/GB1273120A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/63—Generation or supply of power specially adapted for television receivers
    • 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
    • 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
    • H03K4/64—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 combined with means for generating the driving pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Dc-Dc Converters (AREA)
  • Television Receiver Circuits (AREA)

Abstract

1,273,120. Line lime-base supply circuits. PYE Ltd. 5 Feb., 1971, No. 4032/71. Heading H3T. [Also in Division H2] A driver stage of a line time-base derives its power supply from the line output transformer and starting is effected by a further supply including a semi-conductor device which disconnects the further supply when the supply from the time base becomes available. As shown, a mains supply provided through rectifier 27 supplies the line output stage W3, TS5, TS6 and initially the reactor, oscillator and buffer TS1, TS2, TS3 stages via a diac D. A winding W2 on the transformer provides a D.C. supply for these stages via rectifier system 15 to 20 and when its voltage approaches the supply derived from the mains the voltage across the diac falls to a low value and it becomes conducting. The mains supply for the driven stages is derived via a potentiometer 31, 32 of high resistance which charges 33 capacitor with sufficient energy to initiate operation. A negative D.C. supply may be derived from 18.
GB403271A 1971-02-05 1971-02-05 Television line timebase circuits Expired GB1273120A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB403271A GB1273120A (en) 1971-02-05 1971-02-05 Television line timebase circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB403271A GB1273120A (en) 1971-02-05 1971-02-05 Television line timebase circuits

Publications (1)

Publication Number Publication Date
GB1273120A true GB1273120A (en) 1972-05-03

Family

ID=9769455

Family Applications (1)

Application Number Title Priority Date Filing Date
GB403271A Expired GB1273120A (en) 1971-02-05 1971-02-05 Television line timebase circuits

Country Status (1)

Country Link
GB (1) GB1273120A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2195135A1 (en) * 1972-07-27 1974-03-01 Rca Corp
FR2401569A1 (en) * 1977-08-22 1979-03-23 Rca Corp POWER SOURCE FOR TURNING ON A TELEVISION RECEIVER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2195135A1 (en) * 1972-07-27 1974-03-01 Rca Corp
FR2401569A1 (en) * 1977-08-22 1979-03-23 Rca Corp POWER SOURCE FOR TURNING ON A TELEVISION RECEIVER

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees