GB468809A - Television transmitter - Google Patents

Television transmitter

Info

Publication number
GB468809A
GB468809A GB14021/36A GB1402136A GB468809A GB 468809 A GB468809 A GB 468809A GB 14021/36 A GB14021/36 A GB 14021/36A GB 1402136 A GB1402136 A GB 1402136A GB 468809 A GB468809 A GB 468809A
Authority
GB
United Kingdom
Prior art keywords
signals
zero
amplifier
synchronizing signals
reduce
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
GB14021/36A
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB468809A publication Critical patent/GB468809A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • H04N5/0675—Arrangements or circuits at the transmitter end for mixing the synchronising signals with the picture signal or mutually

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)

Abstract

468,809. Television. RADIOAKT.- GES. D. S. LOEWE. May 18, 1936, No. 14021. Convention date, May 18, 1935. [Classes 40 (iii) and 40 (v)] The synchronizing signals in a transmitter of positive films are produced by a margin of increased brilliance and an amplitude filter 27, connected to the output of the photo-electric amplifier 26, passes only the synchronizing signals, which are used to reduce the aerial current to zero irrespective of the amount by which their potential exceeds the threshold value of the filter. The transmitting-valve 16 is modulated at two grids, of which the first 17 modulates by the image signals and the second 20 reduces the current to zero during the synchronizing signals, and the effect of the latter overcomes any effect of the former. According to modifications, the signals passing the amplitude filter are amplified separately and applied to the lead 4, carrying the output from the amplifier 26, and the amplified synchronizing signals so predominate that they always reduce the aerial current to zero, Fig. 1b (not shown) ; the signals passing the amplitude filter are returned to a special controlling-grid in the last valve 14 of the amplifier 26 to produce a peak of emission, which exceeds the image signals and is sufficient to reduce the aerial current to zero.
GB14021/36A 1935-05-18 1936-05-18 Television transmitter Expired GB468809A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE468809X 1935-05-18

Publications (1)

Publication Number Publication Date
GB468809A true GB468809A (en) 1937-07-13

Family

ID=6540916

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14021/36A Expired GB468809A (en) 1935-05-18 1936-05-18 Television transmitter

Country Status (2)

Country Link
GB (1) GB468809A (en)
NL (1) NL45263C (en)

Also Published As

Publication number Publication date
NL45263C (en)

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