GB677201A - Improvements in television scanning devices - Google Patents

Improvements in television scanning devices

Info

Publication number
GB677201A
GB677201A GB20242/50A GB2024250A GB677201A GB 677201 A GB677201 A GB 677201A GB 20242/50 A GB20242/50 A GB 20242/50A GB 2024250 A GB2024250 A GB 2024250A GB 677201 A GB677201 A GB 677201A
Authority
GB
United Kingdom
Prior art keywords
filter circuits
scanning
resistancecapacity
circuit
component
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
GB20242/50A
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.)
Radio Industrie SA
Original Assignee
Radio Industrie SA
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 Radio Industrie SA filed Critical Radio Industrie SA
Publication of GB677201A publication Critical patent/GB677201A/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
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
    • H04N3/233—Distortion correction, e.g. for pincushion distortion correction, S-correction using active elements
    • 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
    • H04N3/22—Circuits for controlling dimensions, shape or centering of picture on screen
    • H04N3/23—Distortion correction, e.g. for pincushion distortion correction, S-correction
    • H04N3/237—Distortion correction, e.g. for pincushion distortion correction, S-correction using passive elements, e.g. diodes

Landscapes

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

Abstract

677,201. Television transmitters. RADIOINDUSTRIE. Aug. 15, 1950 [Oct. 27, 1949], No. 20242/50. Drawings to Specification. Class 40 (iii). In a circuit for correcting S-distortion occurring in magnetically focused television camera tubes as described, for example, in Specification 673,368, wherein by means of filter circuits a substantially sinusoidal waveform having the frequency of one component of scanning is derived from the corresponding scanning or synchronizing signals and is added to the waveform producing the other component of scanning, the filter circuits are of the resistancecapacity type only. The output from the filter circuits is applied to an adjustable resistancecapacity phase-shifting network; by means of this circuit in conjunction with the resistancecapacity filter circuits, the phasing of the sinusoidal output voltage may be made independent of changes in the scanning frequencies.
GB20242/50A 1949-10-27 1950-08-15 Improvements in television scanning devices Expired GB677201A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR677201X 1949-10-27

Publications (1)

Publication Number Publication Date
GB677201A true GB677201A (en) 1952-08-13

Family

ID=9020319

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20242/50A Expired GB677201A (en) 1949-10-27 1950-08-15 Improvements in television scanning devices

Country Status (1)

Country Link
GB (1) GB677201A (en)

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