GB419441A - Improvements in or relating to television and the like systems - Google Patents

Improvements in or relating to television and the like systems

Info

Publication number
GB419441A
GB419441A GB4169/33A GB416933A GB419441A GB 419441 A GB419441 A GB 419441A GB 4169/33 A GB4169/33 A GB 4169/33A GB 416933 A GB416933 A GB 416933A GB 419441 A GB419441 A GB 419441A
Authority
GB
United Kingdom
Prior art keywords
condenser
signals
grid
current
anode current
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
GB4169/33A
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB4169/33A priority Critical patent/GB419441A/en
Priority to US710424A priority patent/US2176663A/en
Priority to FR768471D priority patent/FR768471A/en
Priority to DEE51585D priority patent/DE764492C/en
Publication of GB419441A publication Critical patent/GB419441A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

419,441. Television. ELECTRIC & MUSICAL INDUSTRIES, Ltd., Blyth Road, Hayes, Middlesex, BROWNE, C. O., 29, Monk's Drive, West Acton, London,. and HARDWICK, J., 66, Drayton Gardens, West Drayton, Middlesex. Feb. 10, 1933, No. 4169. [Classes 40 (iii) and 40 (v).] Differences in the amplitude of synchronizing signals are reduced and ground noises and similar disturbances below a certain maximum are eliminated. Synchronizing signals applied to the grid of a valve 9 cause grid current to charge a condenser 8 sufficiently to stop the flow of anode current. Disturbances which are not of sufficient value to cause a flow of anode current are thus eliminated. The synchronizing-signals are always of sufficient amplitude to cause grid current, and the signals appearing in the anode circuit are therefore limited to a uniform amplitude. These are applied through a condenser 18 to the screen grid of a blocking oscillator 20 to start the flow of anode current which is reinforced by positive back-coupling through a transformer 23. When grid-current begins, a condenser 25 is charged and stops the anode current. A condenser 27, which has been discharged by the anode current, then begins to charge up again. The voltage, across the condenser are applied to a television apparatus through a terminal 28. The framing impulses are longer than the line-control signals, and are separated by a resistance 15 in series wth the valve 9 and shunted by a condenser 16 which has a low impedance to short impulses but a high impedance to long impulses. The framing signals are applied to a separate blocking oscillator 29.
GB4169/33A 1933-02-10 1933-02-10 Improvements in or relating to television and the like systems Expired GB419441A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB4169/33A GB419441A (en) 1933-02-10 1933-02-10 Improvements in or relating to television and the like systems
US710424A US2176663A (en) 1933-02-10 1934-02-09 Television and the like system
FR768471D FR768471A (en) 1933-02-10 1934-02-10 Improvements to television and analog systems
DEE51585D DE764492C (en) 1933-02-10 1934-02-11 Circuit arrangement for television receivers in which synchronous characters for line and picture changes of different duration are separated from the picture signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4169/33A GB419441A (en) 1933-02-10 1933-02-10 Improvements in or relating to television and the like systems

Publications (1)

Publication Number Publication Date
GB419441A true GB419441A (en) 1934-11-12

Family

ID=9772001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4169/33A Expired GB419441A (en) 1933-02-10 1933-02-10 Improvements in or relating to television and the like systems

Country Status (4)

Country Link
US (1) US2176663A (en)
DE (1) DE764492C (en)
FR (1) FR768471A (en)
GB (1) GB419441A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE740117C (en) * 1936-04-03 1943-10-12 Telefunken Gmbh Circuit arrangement for the production of steep impulses from impulses with rounded edges
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)
DE754957C (en) * 1936-06-19 1954-06-21 Lorenz C Ag Circuit arrangement for separating the synchronization characters from the icons in television receivers
DE959113C (en) * 1951-06-16 1957-02-28 Interessengemeinschaft Fuer Ru Circuit for the separation of synchronization pulses from a composite signal with the aid of a biased diode

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972011C (en) * 1935-06-12 1959-05-06 Fernseh Gmbh Double-sided amplitude sieve
US2432151A (en) * 1943-01-18 1947-12-09 Hammond Laurens Amplifying system
US2786197A (en) * 1946-03-29 1957-03-19 Sperry Rand Corp Ranging system
US2547621A (en) * 1946-05-09 1951-04-03 Honeywell Regulator Co Electronic amplifier for motor controls
US2564554A (en) * 1947-10-09 1951-08-14 Rca Corp Background control and synchronizing signal separating circuit
US2794913A (en) * 1948-11-16 1957-06-04 Western Union Telegraph Co Facsimile recording amplifier
US2616964A (en) * 1949-05-19 1952-11-04 Philco Corp Synchronizing separator for television receivers
US2739182A (en) * 1950-02-02 1956-03-20 Avco Mfg Corp Single-tube control circuit for horizontal and vertical deflecting systems of a television receiver
US2724050A (en) * 1952-04-23 1955-11-15 Gen Dynamics Corp Pulse separation circuit
US2739237A (en) * 1952-07-11 1956-03-20 Jr Joseph J Stone Amplifier circuit
GB745015A (en) * 1953-08-25 1956-02-15 Mullard Radio Valve Co Ltd Improvements in or relating to circuit arrangements
US2886704A (en) * 1957-05-29 1959-05-12 Raytheon Mfg Co Amplitude limiting circuits

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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)
DE740117C (en) * 1936-04-03 1943-10-12 Telefunken Gmbh Circuit arrangement for the production of steep impulses from impulses with rounded edges
DE754957C (en) * 1936-06-19 1954-06-21 Lorenz C Ag Circuit arrangement for separating the synchronization characters from the icons in television receivers
DE959113C (en) * 1951-06-16 1957-02-28 Interessengemeinschaft Fuer Ru Circuit for the separation of synchronization pulses from a composite signal with the aid of a biased diode

Also Published As

Publication number Publication date
US2176663A (en) 1939-10-17
DE764492C (en) 1952-03-06
FR768471A (en) 1934-08-07

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