GB522495A - Improvements in or relating to control circuit arrangements for electrical oscillation generators - Google Patents

Improvements in or relating to control circuit arrangements for electrical oscillation generators

Info

Publication number
GB522495A
GB522495A GB3635938A GB3635938A GB522495A GB 522495 A GB522495 A GB 522495A GB 3635938 A GB3635938 A GB 3635938A GB 3635938 A GB3635938 A GB 3635938A GB 522495 A GB522495 A GB 522495A
Authority
GB
United Kingdom
Prior art keywords
frequency
valve
plate
oscillator
pair
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
GB3635938A
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Priority to GB3635938A priority Critical patent/GB522495A/en
Publication of GB522495A publication Critical patent/GB522495A/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
    • H04N3/24—Blanking circuits
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
    • H04N5/123—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal directly commands a frequency generator

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

522,495. Automatic control systems for highfrequency oscillators. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., PLAISTOWE, D. L., and PARKINSON, C. E. Dec. 13, 1938, No. 36359. [Class 38 (iv)] Oscillation frequency.-The frequency of an oscillator V4, V5, supplying, for example, television frame and line frequencies via frequency dividers Dl and D4, is maintained in synchronism with supply mains by means of a cathode ray tube CR. Mains frequency is applied to one pair of deflecting plates via a tapped transformer TR1 and to the other pair via a phase shifting valve V1, thus causing the cathode beam to move in an elliptic path. Pulses from the oscillator are applied to one pair of plates via a buffer valve V2, and by adjustment of the relative amplitudes impressed upon the plates, the beam can be caused to impinge on the plate PY2, and by connecting the plate to the grid of a control valve V3, drift of the pulse off the plate PY2 is caused to control the frequency of the oscillator, In a modification the plate PY2 is bifurcated, one half being connected to the valve V3 as shown in Fig. 1, and the other half being connected thereto through a phase-reversing valve.
GB3635938A 1938-12-13 1938-12-13 Improvements in or relating to control circuit arrangements for electrical oscillation generators Expired GB522495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3635938A GB522495A (en) 1938-12-13 1938-12-13 Improvements in or relating to control circuit arrangements for electrical oscillation generators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3635938A GB522495A (en) 1938-12-13 1938-12-13 Improvements in or relating to control circuit arrangements for electrical oscillation generators

Publications (1)

Publication Number Publication Date
GB522495A true GB522495A (en) 1940-06-19

Family

ID=10387418

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3635938A Expired GB522495A (en) 1938-12-13 1938-12-13 Improvements in or relating to control circuit arrangements for electrical oscillation generators

Country Status (1)

Country Link
GB (1) GB522495A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604534A (en) * 1946-08-02 1952-07-22 Cinema Television Ltd Apparatus for controlling scanning accuracy of cathode-ray tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2604534A (en) * 1946-08-02 1952-07-22 Cinema Television Ltd Apparatus for controlling scanning accuracy of cathode-ray tubes

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