GB709939A - Deflecting circuit arrangements for cathode ray tubes - Google Patents

Deflecting circuit arrangements for cathode ray tubes

Info

Publication number
GB709939A
GB709939A GB1675751A GB1675751A GB709939A GB 709939 A GB709939 A GB 709939A GB 1675751 A GB1675751 A GB 1675751A GB 1675751 A GB1675751 A GB 1675751A GB 709939 A GB709939 A GB 709939A
Authority
GB
United Kingdom
Prior art keywords
valve
time base
coils
circuit
july
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
GB1675751A
Inventor
Cyril Arthur Lee
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1675751A priority Critical patent/GB709939A/en
Priority to DEE5751A priority patent/DE936694C/en
Publication of GB709939A publication Critical patent/GB709939A/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
    • H03K4/10—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
    • H03K4/28—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 a switching device
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Details Of Television Scanning (AREA)

Abstract

709,939. Saw-tooth generating circuits. ELECTRIC & MUSICAL INDUSTRIES, Ltd. July 3, 1952 [July 14, 1951], No. 16757/51. Class 40 (6). [Also in Groups XXXV and XXXVI] A pair of deflecting coils 1, 2 for a cathode-ray tube are wound opposite to each other on a closed magnetic core so as to set up opposing fluxes and are connected in parallel directly in the output circuit of a driving valve, an energy recovery circuit being connected to a pair of tapping points 8, 9 disposed similarly on the coils. The tapping points may be connected by a resistor to reduce circulating currents. In the line time base shown the filament of the diode of the energy recovery circuit is heated by connecting it in series in the anode circuit of the driver valve, the capacitor 4 being short circuited until the valve has warmed up. The voltage across this capacitor is used to boost the H.T. supply to the driver valve and provides substantially the whole of the voltage required for the frame time base output valve 15. The Provisional Specification describes a modification in which the diode cathode is connected to the anode of the driving valve and states that when the frame time base includes directly fed deflection coils an auxiliary coil or a permanent magnet may be used for centering the picture.
GB1675751A 1951-07-14 1951-07-14 Deflecting circuit arrangements for cathode ray tubes Expired GB709939A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1675751A GB709939A (en) 1951-07-14 1951-07-14 Deflecting circuit arrangements for cathode ray tubes
DEE5751A DE936694C (en) 1951-07-14 1952-07-13 Circuit arrangement for generating saegezahnfoermiger currents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1675751A GB709939A (en) 1951-07-14 1951-07-14 Deflecting circuit arrangements for cathode ray tubes

Publications (1)

Publication Number Publication Date
GB709939A true GB709939A (en) 1954-06-02

Family

ID=10083086

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1675751A Expired GB709939A (en) 1951-07-14 1951-07-14 Deflecting circuit arrangements for cathode ray tubes

Country Status (2)

Country Link
DE (1) DE936694C (en)
GB (1) GB709939A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5727014A (en) * 1995-10-31 1998-03-10 Hewlett-Packard Company Vertical-cavity surface-emitting laser generating light with a defined direction of polarization

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5727014A (en) * 1995-10-31 1998-03-10 Hewlett-Packard Company Vertical-cavity surface-emitting laser generating light with a defined direction of polarization

Also Published As

Publication number Publication date
DE936694C (en) 1955-12-22

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