GB401990A - Improvements in or relating to television and like systems - Google Patents

Improvements in or relating to television and like systems

Info

Publication number
GB401990A
GB401990A GB15496/33A GB1549633A GB401990A GB 401990 A GB401990 A GB 401990A GB 15496/33 A GB15496/33 A GB 15496/33A GB 1549633 A GB1549633 A GB 1549633A GB 401990 A GB401990 A GB 401990A
Authority
GB
United Kingdom
Prior art keywords
valve
circuit
shunt
condenser
output
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
GB15496/33A
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 claimed from GB2537433A external-priority patent/GB413894A/en
Publication of GB401990A publication Critical patent/GB401990A/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
    • H04N5/14—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
    • H04N5/165—Circuitry for reinsertion of dc and slowly varying components of signal; Circuitry for preservation of black or white level to maintain the black level constant
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
    • H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
    • H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
    • H03K4/26—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor
    • H03K4/39—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as an amplifier
    • H03K4/43—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth current is produced through an inductor using a tube operating as an amplifier combined with means for generating the driving pulses
    • 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
    • H04N3/02—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only
    • H04N3/04—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only having a moving aperture also apertures covered by lenses
    • 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
    • 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
    • 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
    • H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
    • H04N3/34—Elemental scanning area oscillated rapidly in direction transverse to main scanning direction
    • 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
    • H04N3/36—Scanning of motion picture films, e.g. for telecine
    • 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
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/3147—Multi-projection systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Television Systems (AREA)
  • Picture Signal Circuits (AREA)
  • Details Of Television Scanning (AREA)

Abstract

401,990. Television. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London.-(Assignees of Bedford, A. V.; 118, East Palmer Avenue, Collingswood, New Jersey, U.S.A.) May 29, 1933, No. 15496. Convention date, May 28, 1932. [Classes 40 (iii) and 40 (v).] In the production of a saw-tooth current 33 for deflecting the ray 16.in a cathode-ray tube 10, a feed-back circuit 36, associated with a valve 32, compensates distortion of the wave form. Short impulses at the picture frequency, for example 24 cycles per second, are produced by a positively back-coupled valve 23, with a condenser 25 in its grid circuit, which is charged during each impulse to block the valve until the charge has leaked through a resistance 27. A network 30 in the output of the valve gives rise to a voltage wave 31, which would produce a saw-tooth wave in the output of the valve 32 in the absence of distortion due to the non- linear charging characteristic of the condenser 28, current passing through a resistance 34, distributed capacity in the output circuit, the inductive load, and the characteristic of the valve. The distortion is counteracted by negative reaction through an impedance network 36 in the cathode circuit of the valve. Other networks including an inductance shunt and a capacity shunt, or only an inductance shunt or a capacity shunt may be used, Fig. 4 (not shown). A second circuit 20 produces a similar current 40 at the line frequency. The oscillator may comprise a valve which periodically discharges a condenser, Fig. 5 (not shown).
GB15496/33A 1931-09-26 1933-05-29 Improvements in or relating to television and like systems Expired GB401990A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US565226A US2289914A (en) 1931-09-26 1931-09-26 Television system
US401990XA 1932-05-28 1932-05-28
GB2537433A GB413894A (en) 1933-09-13 1933-09-13 Improvements in or relating to television systems

Publications (1)

Publication Number Publication Date
GB401990A true GB401990A (en) 1933-11-23

Family

ID=31950339

Family Applications (2)

Application Number Title Priority Date Filing Date
GB25079/32A Expired GB408656A (en) 1931-09-26 1932-09-08 Improvements in or relating to television and like systems
GB15496/33A Expired GB401990A (en) 1931-09-26 1933-05-29 Improvements in or relating to television and like systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB25079/32A Expired GB408656A (en) 1931-09-26 1932-09-08 Improvements in or relating to television and like systems

Country Status (6)

Country Link
US (1) US2289914A (en)
BE (12) BE371688A (en)
DE (2) DE755140C (en)
FR (3) FR699544A (en)
GB (2) GB408656A (en)
NL (2) NL39554C (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740131C (en) * 1935-10-25 1943-10-13 Opta Radio Ag Arrangement for generating deflection voltages for deflecting the cathode ray in Braun tubes using a tilt generator
DE741454C (en) * 1934-12-20 1943-11-11 Telefunken Gmbh Arrangement for generating a saegezahnfoermigen current curve, especially for the magnetic deflection of cathode rays for oscilloscope and television purposes
DE741537C (en) * 1938-01-11 1943-11-12 Fernseh Gmbh Switching arrangement for automatic elimination of the distortions that occur with electromagnetic beam deflection
DE755117C (en) * 1936-09-15 1951-07-26 Fernseh Gmbh Arrangement for generating an anode voltage for electron beam tubes by rectifying a tilting oscillation serving for electromagnetic beam deflection
DE763072C (en) * 1936-02-03 1952-06-05 Marconi Wireless Telegraph Co Feedback, intermittently self-locking oscillation generator with an RC element in the grid circle (blocking oscillator)
DE763069C (en) * 1935-02-28 1953-02-09 Rca Corp Circuit arrangement for phase shifting pulses
DE758006C (en) * 1939-02-26 1953-02-16 Telefunken Gmbh Electric saw tooth generator with a parallel resonance circuit, which consists of a deflection coil and its own capacitance, and a transformer-type voltage feedback-coupled tube
DE889309C (en) * 1935-02-06 1953-09-10 Telefunken Gmbh Circuit arrangement for generating a sawtooth-shaped current curve for the magnetic deflection of cathode rays, in particular for television purposes
DE755243C (en) * 1935-05-25 1954-12-13 Opta Radio A G Arrangement for deflecting the cathode ray in cathode ray tubes by slow charging and sudden non-linear discharge of a capacitor
DE755231C (en) * 1936-08-10 1958-04-24 Fernseh Gmbh Arrangement for generating time-proportional deflection currents
DE973547C (en) * 1936-04-29 1960-03-24 Emi Ltd Circuit arrangement for generating saegezahnfoermiger currents

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE402568A (en) * 1933-04-13
DE1018098B (en) * 1935-08-06 1957-10-24 Fernseh Gmbh Arrangement for the synchronization of several broadcasting points from a central point for television and image transmissions
DE755706C (en) * 1936-11-27 1954-11-29 Opta Radio A G Method for generating line characters and alternating picture characters in television broadcasters
DE741785C (en) * 1937-11-29 1943-11-17 Fernseh Gmbh Method for the transmission of television pictures whose brightness range is less than the available modulation range
DE756444C (en) * 1939-05-13 1953-01-19 Aeg Arrangement for the linearization of tilting oscillations consisting of parts of an exponential curve
US2548436A (en) * 1946-01-25 1951-04-10 Hazeltine Corp Television receiver background control circuit
US2564554A (en) * 1947-10-09 1951-08-14 Rca Corp Background control and synchronizing signal separating circuit
BE518173A (en) * 1950-06-25
DE1022683B (en) * 1953-01-08 1958-01-16 Cie Generale D Electricite Soc Amplifier with time-variable, frequency-dependent amplification and phase rotation characteristics
DE1274624B (en) * 1955-01-07 1968-08-08 Friedrich Herz Method for deflecting the cathode ray in television by means of sinusoidal voltages derived line and image deflection voltages
US3293483A (en) * 1962-01-08 1966-12-20 Siemens Ag Radiation controlled electron radiation source

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT113936B (en) * 1926-10-19 1929-08-10 Siemens Ag Device for limiting the amplitude.
DE482874C (en) * 1927-01-03 1929-09-21 Gen Electric Receiving arrangement for high-frequency signal currents with automatic limitation of the signal volume

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741454C (en) * 1934-12-20 1943-11-11 Telefunken Gmbh Arrangement for generating a saegezahnfoermigen current curve, especially for the magnetic deflection of cathode rays for oscilloscope and television purposes
DE889309C (en) * 1935-02-06 1953-09-10 Telefunken Gmbh Circuit arrangement for generating a sawtooth-shaped current curve for the magnetic deflection of cathode rays, in particular for television purposes
DE763069C (en) * 1935-02-28 1953-02-09 Rca Corp Circuit arrangement for phase shifting pulses
DE755243C (en) * 1935-05-25 1954-12-13 Opta Radio A G Arrangement for deflecting the cathode ray in cathode ray tubes by slow charging and sudden non-linear discharge of a capacitor
DE740131C (en) * 1935-10-25 1943-10-13 Opta Radio Ag Arrangement for generating deflection voltages for deflecting the cathode ray in Braun tubes using a tilt generator
DE763072C (en) * 1936-02-03 1952-06-05 Marconi Wireless Telegraph Co Feedback, intermittently self-locking oscillation generator with an RC element in the grid circle (blocking oscillator)
DE973547C (en) * 1936-04-29 1960-03-24 Emi Ltd Circuit arrangement for generating saegezahnfoermiger currents
DE755231C (en) * 1936-08-10 1958-04-24 Fernseh Gmbh Arrangement for generating time-proportional deflection currents
DE755117C (en) * 1936-09-15 1951-07-26 Fernseh Gmbh Arrangement for generating an anode voltage for electron beam tubes by rectifying a tilting oscillation serving for electromagnetic beam deflection
DE741537C (en) * 1938-01-11 1943-11-12 Fernseh Gmbh Switching arrangement for automatic elimination of the distortions that occur with electromagnetic beam deflection
DE758006C (en) * 1939-02-26 1953-02-16 Telefunken Gmbh Electric saw tooth generator with a parallel resonance circuit, which consists of a deflection coil and its own capacitance, and a transformer-type voltage feedback-coupled tube

Also Published As

Publication number Publication date
FR741099A (en) 1933-02-04
NL61555B (en)
NL39554C (en) 1936-12-15
BE396560A (en)
BE398015A (en)
GB408656A (en) 1934-04-09
DE755140C (en) 1953-03-09
BE391266A (en)
BE371688A (en) 1930-09-30
BE377922A (en)
US2289914A (en) 1942-07-14
BE390395A (en)
BE387822A (en)
BE389285A (en)
FR39840E (en) 1932-03-24
BE395907A (en)
BE393588A (en)
FR699544A (en) 1931-02-16
BE371659A (en) 1930-08-30
DE648195C (en) 1937-07-24
BE390958A (en)

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