FR1170849A - Dispositif de modulation perfectionné - Google Patents

Dispositif de modulation perfectionné

Info

Publication number
FR1170849A
FR1170849A FR1170849DA FR1170849A FR 1170849 A FR1170849 A FR 1170849A FR 1170849D A FR1170849D A FR 1170849DA FR 1170849 A FR1170849 A FR 1170849A
Authority
FR
France
Prior art keywords
modulation device
advanced modulation
advanced
modulation
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
Other languages
English (en)
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
Original Assignee
Marconis Wireless Telegraph 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 filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of FR1170849A publication Critical patent/FR1170849A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/16—Amplitude modulation by means of discharge device having at least three electrodes
    • H03C1/18—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid
    • H03C1/20—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to anode
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/16—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level
    • H04N5/18—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
    • H04N5/185—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit for the black level

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Amplitude Modulation (AREA)
  • Toys (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Television Receiver Circuits (AREA)
FR1170849D 1956-01-19 1957-01-11 Dispositif de modulation perfectionné Expired FR1170849A (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB342615X 1956-01-19
GB338864X 1956-01-20
GB70956X 1956-09-07

Publications (1)

Publication Number Publication Date
FR1170849A true FR1170849A (fr) 1959-01-19

Family

ID=27254956

Family Applications (2)

Application Number Title Priority Date Filing Date
FR1163605D Expired FR1163605A (fr) 1956-01-19 1956-12-26 Perfectionnements aux appareils de télévision
FR1170849D Expired FR1170849A (fr) 1956-01-19 1957-01-11 Dispositif de modulation perfectionné

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR1163605D Expired FR1163605A (fr) 1956-01-19 1956-12-26 Perfectionnements aux appareils de télévision

Country Status (5)

Country Link
US (2) US2907821A (fr)
CH (2) CH338864A (fr)
DE (1) DE1026353B (fr)
FR (2) FR1163605A (fr)
GB (2) GB799052A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1118257B (de) * 1958-10-17 1961-11-30 Fernseh Gmbh Schaltungsanordnung zur Amplitudenbegrenzung von Impulsen
US3535444A (en) * 1968-05-13 1970-10-20 Rca Corp Noise immune video circuits
GB1269246A (en) * 1969-11-01 1972-04-06 Marconi Co Ltd Improvements in or relating to television cameras

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USB452582I5 (fr) * 1935-02-25
GB515427A (en) * 1938-05-31 1939-12-05 Charles Leslie Faudell Improvements in or relating to television and like systems
US2583345A (en) * 1947-12-09 1952-01-22 Rca Corp Apparatus for modifying the transfer characteristics of a vacuum tube
GB661807A (en) * 1949-05-25 1951-11-28 John Edward Cope Television film scanning apparatus
GB665074A (en) * 1949-11-04 1952-01-16 British Telecomm Res Ltd Improvements in and relating to balanced modulators
US2717931A (en) * 1950-07-29 1955-09-13 Rca Corp Circuit for varying amplifier gain and frequency response with signal amplitude
US2728892A (en) * 1952-06-18 1955-12-27 Rca Corp Modulator circuit
US2794077A (en) * 1955-08-22 1957-05-28 Rca Corp Gain-modulated amplifier

Also Published As

Publication number Publication date
US2907821A (en) 1959-10-06
GB799052A (en) 1958-07-30
DE1026353B (de) 1958-03-20
US2944227A (en) 1960-07-05
CH338864A (fr) 1959-06-15
GB790338A (en) 1958-02-05
FR1163605A (fr) 1958-09-29
CH342615A (fr) 1959-11-30

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