GB1043376A - Circuit for controlling beam deflection in cathode ray tubes - Google Patents

Circuit for controlling beam deflection in cathode ray tubes

Info

Publication number
GB1043376A
GB1043376A GB20692/64A GB2069264A GB1043376A GB 1043376 A GB1043376 A GB 1043376A GB 20692/64 A GB20692/64 A GB 20692/64A GB 2069264 A GB2069264 A GB 2069264A GB 1043376 A GB1043376 A GB 1043376A
Authority
GB
United Kingdom
Prior art keywords
deflection
coil
increasing
emitter
transistor
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
GB20692/64A
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.)
NOUVELLES TECH RADIOELECTRIQUE
Original Assignee
NOUVELLES TECH RADIOELECTRIQUE
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 NOUVELLES TECH RADIOELECTRIQUE filed Critical NOUVELLES TECH RADIOELECTRIQUE
Publication of GB1043376A publication Critical patent/GB1043376A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/04—Modifications for accelerating switching
    • H03K17/041—Modifications for accelerating switching without feedback from the output circuit to the control circuit
    • H03K17/04113—Modifications for accelerating switching without feedback from the output circuit to the control circuit in bipolar transistor switches
    • 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
    • H03K4/69—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
    • H03K4/696—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 using means for reducing power dissipation or for shortening the flyback time, e.g. applying a higher voltage during flyback time

Landscapes

  • Details Of Television Scanning (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Amplifiers (AREA)

Abstract

1,043,376. Transistor circuits. SOC. INDUSTRIELLE DES NOUVELLES TECHNIQUES RADIOELECTRIQUES ET DE L'ELECTRONIQUE FRANCAISE. May 19, 1964 [May 17, 1963; March 20, 1964], No. 20692/64. Heading H3T. In a high-speed deflection circuit for a cathode-ray tube, a pair of coils 1<SP>1</SP>, 1<SP>11</SP> are driven in push-pull by transistors 21, 2<SP>11</SP>, further transistors 11<SP>1</SP>, 11<SP>11</SP> and diodes 12<SP>1</SP>, 12<SP>11</SP> being arranged to increase the supply voltage to each coil momentarily when the current is increasing in the respective coil. The invention is applicable to systems in which the beam is rapidly displaced from one rest position to another. Transistor 2<SP>1</SP> is preferably driven by a pulse obtained from an amplifier 7<SP>1</SP> via an emitter follower 8<SP>1</SP>, negative feedback being provided at 9<SP>1</SP>. An inverse pulse is derived from the emitter of 2<SP>1</SP> and fed via amplifier 7<SP>11</SP> and emitter follower 8<SP>11</SP> to control transistor 2<SP>11</SP>. Diodes 12<SP>1</SP>, 12<SP>11</SP> normally connect the deflection coils 1<SP>1</SP>, 1<SP>11</SP> to a supply Up, but at the time of each negative-going step in the waveforms fed to 2<SP>1</SP>, 2<SP>11</SP>, a positive-going transient at the respective collector (e.g. c<SP>11</SP>) turns on 11<SP>1</SP>, momentarily connecting the upper end a<SP>1</SP> of coil 1<SP>1</SP> to a higher voltage supply U t . This has the effect of increasing the rise of current and hence increasing the speed of deflection. In Fig. 3 (not shown), further emitter followers (13<SP>1</SP>, 13<SP>11</SP>) are interposed between c<SP>11</SP> and a<SP>1</SP> so as to linearize the deflection.
GB20692/64A 1963-05-17 1964-05-19 Circuit for controlling beam deflection in cathode ray tubes Expired GB1043376A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR935224A FR1369395A (en) 1963-05-17 1963-05-17 Assembly to control very fast variations of the current of an inductive circuit
FR968094A FR1398810A (en) 1963-05-17 1964-03-20 Device for controlling very rapid deflections of the cathode beam of an electron tube

Publications (1)

Publication Number Publication Date
GB1043376A true GB1043376A (en) 1966-09-21

Family

ID=26201389

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20692/64A Expired GB1043376A (en) 1963-05-17 1964-05-19 Circuit for controlling beam deflection in cathode ray tubes

Country Status (5)

Country Link
US (1) US3337767A (en)
DE (1) DE1229653B (en)
FR (2) FR1369395A (en)
GB (1) GB1043376A (en)
NL (1) NL147595B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3440485A (en) * 1967-02-24 1969-04-22 Westinghouse Electric Corp Ppi deflection amplifier utilizing energy recovery
US3453555A (en) * 1967-04-19 1969-07-01 Burroughs Corp High speed deflection amplifier
US3470484A (en) * 1967-12-14 1969-09-30 Tektronix Inc Amplifier having push-pull output with current sharing operation
US3628083A (en) * 1969-08-06 1971-12-14 Systems Res Labor Magnetic deflection amplifier utilizing both positive and negative voltage supplies for high-speed deflection
US3628066A (en) * 1969-11-10 1971-12-14 Okonite Co Adjustable frequency bipolar square wave generating circuit
US3983452A (en) * 1975-03-31 1976-09-28 Rca Corporation High efficiency deflection circuit
US4054816A (en) * 1976-07-02 1977-10-18 International Business Machines Corporation Sweep circuit for cathode-ray tube display

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US315573A (en) * 1885-04-14 Miecm geaham tousley
NL223397A (en) * 1957-12-19
US3092753A (en) * 1962-01-15 1963-06-04 Hughes Aircraft Co Magnetic deflection apparatus for cathode ray type tube

Also Published As

Publication number Publication date
FR1369395A (en) 1964-08-14
NL6405513A (en) 1964-11-18
DE1229653B (en) 1966-12-01
FR1398810A (en) 1965-05-14
NL147595B (en) 1975-10-15
US3337767A (en) 1967-08-22

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