GB1500833A - Tv deflection circuit arrangement - Google Patents

Tv deflection circuit arrangement

Info

Publication number
GB1500833A
GB1500833A GB4981775A GB4981775A GB1500833A GB 1500833 A GB1500833 A GB 1500833A GB 4981775 A GB4981775 A GB 4981775A GB 4981775 A GB4981775 A GB 4981775A GB 1500833 A GB1500833 A GB 1500833A
Authority
GB
United Kingdom
Prior art keywords
sawtooth
distorted
coupling capacitor
deflection
circuit
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
GB4981775A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1500833A publication Critical patent/GB1500833A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H03K4/69—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 an amplifier
    • H03K4/693—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 an amplifier operating in push-pull, e.g. class B
    • 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
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
    • H04N3/233—Distortion correction, e.g. for pincushion distortion correction, S-correction using active elements

Abstract

1500833 Vertical deflection circuit INTERNATIONAL STANDARD ELECTRIC CORP 4 Dec 1975 [9 Dec 1974] 49817/75 Heading H3P A television receiver has a vertical deflection arrangement comprising means 2, 5 for generating a distorted sawtooth waveform the output of which is applied to the non-inverting input 11 of a deflection amplifier 9 which has an output 12 coupled to the series arrangement of deflection coils 15, a current sampling resistor 16 and a coupling capacitor 20 in that order. There is a negative feedback path between the junction of the coils and the resistor and the inverting input of the amplifier, and the means for generating a distorted sawtooth is operated with reference to the potential existing between the current sampling resistor and the coupling capacitor. An inductance (not shown) may be connected between the deflection coils, or between the current sampling resistor 16 and the coils, for N-S raster distortion correction. The coupling capacitor may be connected to ground via a series resistor 24 to provide a sawtooth without a D.C. component to other stages. A parabola shaped voltage is present at the junction between resistor 16 and the coupling capacitor and this is added to the distorted sawtooth produced 5 from a sawtooth generator 2 which receives synch. pulses at 1. Conventionally, parabolic feedback signals vary widely from circuit to circuit because of capacitor tolerances and these are compensated for by varying parameters in the distorted sawtooth producing circuit 5, the feedback going only to the deflection amplifier. By feeding back further and by making the feedback voltage depend on the value of the capacitor 20 the present circuit makes correction for tolerances unnecessary thereby simplifying the requirements of the distorted sawtooth generator. The coupling capacitor 6 may be placed at the input of the distorted sawtooth generator 5 (not shown) rather than at the output.
GB4981775A 1974-12-09 1975-12-04 Tv deflection circuit arrangement Expired GB1500833A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742458126 DE2458126C2 (en) 1974-12-09 1974-12-09 Vertical deflection circuit for television receivers

Publications (1)

Publication Number Publication Date
GB1500833A true GB1500833A (en) 1978-02-15

Family

ID=5932920

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4981775A Expired GB1500833A (en) 1974-12-09 1975-12-04 Tv deflection circuit arrangement

Country Status (8)

Country Link
AT (1) AT352799B (en)
AU (1) AU8707275A (en)
BE (1) BE836411A (en)
DE (1) DE2458126C2 (en)
FR (1) FR2294599A1 (en)
GB (1) GB1500833A (en)
IT (1) IT1051771B (en)
NL (1) NL7514185A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3743352A1 (en) * 1987-12-21 1989-07-06 Electronic Werke Deutschland Pulsed vertical deflection circuit for a television receiver
JPH05182599A (en) * 1991-12-26 1993-07-23 Hitachi Ltd Focus yoke, electromagnetic focus type crt display including it, and stray capacitor elimination type negative feedback circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1158142A (en) * 1965-04-26 1969-07-16 Automatic Information Data Ser Transistorized Time Base, Especially For Television Cameras, Monitors And Receivers
DE1289098B (en) * 1966-08-09 1969-02-13 Telefunken Patent Deflection circuit with a final transistor
US3784857A (en) * 1972-08-16 1974-01-08 Rca Corp Television deflection circuit with low power requirement
DE2240497B2 (en) * 1972-08-17 1979-01-04 Texas Instruments Deutschland Gmbh, 8050 Freising Vertical deflection circuit for television picture tubes
NL7216764A (en) * 1972-12-09 1974-06-11

Also Published As

Publication number Publication date
ATA897075A (en) 1979-03-15
AT352799B (en) 1979-10-10
BE836411A (en) 1976-06-09
DE2458126C2 (en) 1984-06-07
FR2294599A1 (en) 1976-07-09
AU8707275A (en) 1977-06-02
DE2458126A1 (en) 1976-06-10
IT1051771B (en) 1981-05-20
NL7514185A (en) 1976-06-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee