GB1119563A - Improved television scan generator - Google Patents

Improved television scan generator

Info

Publication number
GB1119563A
GB1119563A GB3137265A GB3137265A GB1119563A GB 1119563 A GB1119563 A GB 1119563A GB 3137265 A GB3137265 A GB 3137265A GB 3137265 A GB3137265 A GB 3137265A GB 1119563 A GB1119563 A GB 1119563A
Authority
GB
United Kingdom
Prior art keywords
valve
flyback
current
capacitor
voltage
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
GB3137265A
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.)
Robert Bosch Fernsehanlagen GmbH
Original Assignee
Fernseh GmbH
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 Fernseh GmbH filed Critical Fernseh GmbH
Publication of GB1119563A publication Critical patent/GB1119563A/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
    • H03K4/90—Linearisation of ramp; Synchronisation of pulses
    • 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
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
    • H03K4/39—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as an amplifier
    • H03K4/43—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as an amplifier combined with means for generating the driving pulses
    • 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
    • H03K4/72—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 combined with means for generating the driving pulses
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K6/00—Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass
    • H03K6/04—Modifying slopes of pulses, e.g. S-correction

Landscapes

  • Details Of Television Scanning (AREA)

Abstract

1,119,563. Sawtooth generating circuits. FERNSEH G.m.b.H. 22 July, 1965 [22 July, 1964], No. 31372/65. Headings H3P and H3T. In a field time-base of the type in which a linearity correcting feedback voltage is generated by differentiating, amplifying and integrating the deflecting current, the input to the amplifier is applied in such a manner that spurious voltage impulses, e.g. line pulses arising during the flyback are removed. In Fig. 3, the deflecting current is differentiated by transformer 27, roughly filtered at 32-35, amplified by a valve 31 and integrated by a resistor 12 and a capacitor 23, the latter being charged and discharged to generate the input waveform for the driver valve 22. The sense of the correcting voltage 31 is such as to cut the valve 31 off during the flyback so that rectification in the valve of spurious line frequency pulses is prevented. In Fig. 4, the input waveform for the transistor driver amplifier 46-43 is generated by charging a capacitor 47 through a transistor 48 and discharging it through 50. The deflection current in deflection coils 2, 2<SP>1</SP> is differentiated by transformer 51 roughly filtered by 52-56 amplified by 57 and integrated by controlling the current through charging transistor 48. Again, the correcting voltage is in such a sense that amplifier 57 is cut-off during the flyback. Feedback through a capacitor 59 further improves the deflection linearity.
GB3137265A 1964-07-22 1965-07-22 Improved television scan generator Expired GB1119563A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF43521A DE1209154B (en) 1964-07-22 1964-07-22 Circuit arrangement for linearizing the vertical deflection current in deflection systems of television cathode ray tubes for dismantling standards with an intermediate line

Publications (1)

Publication Number Publication Date
GB1119563A true GB1119563A (en) 1968-07-10

Family

ID=7099604

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3137265A Expired GB1119563A (en) 1964-07-22 1965-07-22 Improved television scan generator

Country Status (2)

Country Link
DE (1) DE1209154B (en)
GB (1) GB1119563A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1053028B (en) * 1958-02-28 1959-03-19 Graetz Kommandit Ges Deflection generator for generating a saw tooth-shaped current of vertical frequency for television purposes

Also Published As

Publication number Publication date
DE1209154B (en) 1966-01-20

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