GB578046A - An improved electric circuit arrangement including a cathode-ray tube - Google Patents

An improved electric circuit arrangement including a cathode-ray tube

Info

Publication number
GB578046A
GB578046A GB17660/43A GB1766043A GB578046A GB 578046 A GB578046 A GB 578046A GB 17660/43 A GB17660/43 A GB 17660/43A GB 1766043 A GB1766043 A GB 1766043A GB 578046 A GB578046 A GB 578046A
Authority
GB
United Kingdom
Prior art keywords
voltage
amplifier
grid
cathode
ray tube
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
GB17660/43A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB578046A publication Critical patent/GB578046A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04N3/26—Modifications of scanning arrangements to improve focusing
    • 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
    • H03K6/02—Amplifying pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Details Of Television Scanning (AREA)

Abstract

578,046. Valve amplifying circuits. PHILIPS LAMPS, Ltd. Oct. 26, 1943, No. 17660. Convention date, Oct. 1, 1942. [Classes 40 (iii) and 40 (v)] The deflecting electrodes in a cathode-ray tube are fed from a push-pull amplifier in which an impedance element interconnects the anodes and a second impedance is interposed between an adjustable tapping of the first impedance and a point of low signal voltage. The input voltage is applied to one valve of the push-pull pair and the grid of the second valve is fed from the tapping on the first impedance. The adjustable tapping produces degenerative feed-back network and enables both phase and voltage balance of the amplifier to be obtained and also neutralization of the effects of stray capacities. As shown, similar amplifiers 20, 21 and 30, 31 are provided for the vertical and horizontal deflecting voltages respectively. The horizontal deflecting voltage is applied to the input grid 20b of the amplifier 20, 21. The anodes are directly connected to the deflecting electrodes 16 of the cathode-ray tube 10 and are also connected together by the resistance 22, the tapping on which is connected through the resistance 24 to the high tension supply. The voltage across the resistance 24 is applied through condenser 26 to provide the out-ofphase voltage applied to the grid 21b. The voltage source energizing the amplifier has its negative pole connected to the positive pole of the cathode-ray tube energizing voltage source and its positive pole connected to the amplifier. The potentiometers 40, 41 serve to provide adjustable voltages for the focusing electrode 14 and control electrode 13 so as to control the focusing and intensity of the beam. If amplifier valves of high amplification factor are used, the cathodes may be directly grounded and the bias resistance-condenser combination 28, 29, otherwise used, may be omitted. In the former case, grid bias for operating the valves is obtained by rectification of signal voltages. Instead of the triode valves shown, tetrode, pentode or other multi-grid valves may be used.
GB17660/43A 1942-10-01 1943-10-26 An improved electric circuit arrangement including a cathode-ray tube Expired GB578046A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US460447A US2391862A (en) 1942-10-01 1942-10-01 Electrical circuit arrangement

Publications (1)

Publication Number Publication Date
GB578046A true GB578046A (en) 1946-06-13

Family

ID=23828746

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17660/43A Expired GB578046A (en) 1942-10-01 1943-10-26 An improved electric circuit arrangement including a cathode-ray tube

Country Status (2)

Country Link
US (1) US2391862A (en)
GB (1) GB578046A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2456809A (en) * 1942-11-30 1948-12-21 Cossor Ltd A C Cathode-ray tube
US2568927A (en) * 1946-06-05 1951-09-25 Rca Corp Computing device
US2513225A (en) * 1946-09-06 1950-06-27 Rca Corp Power supply system
US2473718A (en) * 1946-09-21 1949-06-21 Du Mont Allen B Lab Inc Oscillograph circuit to avoid distortion
US2777214A (en) * 1951-05-11 1957-01-15 Henry P Birmingham Radar tracking demonstrating and training instrument

Also Published As

Publication number Publication date
US2391862A (en) 1946-01-01

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