DE967256C - Circuit arrangement for obtaining the amplitudes of a synchronizing pulse which exceed a certain minimum value - Google Patents

Circuit arrangement for obtaining the amplitudes of a synchronizing pulse which exceed a certain minimum value

Info

Publication number
DE967256C
DE967256C DEE2372D DEE0002372D DE967256C DE 967256 C DE967256 C DE 967256C DE E2372 D DEE2372 D DE E2372D DE E0002372 D DEE0002372 D DE E0002372D DE 967256 C DE967256 C DE 967256C
Authority
DE
Germany
Prior art keywords
grid
minimum value
exceed
obtaining
circuit arrangement
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
DEE2372D
Other languages
German (de)
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
Original Assignee
EMI 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 filed Critical EMI Ltd
Application granted granted Critical
Publication of DE967256C publication Critical patent/DE967256C/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
    • H04N5/08—Separation of synchronising signals from picture signals

Description

In Betracht gezogene Druckschriften:Considered publications:

Deutsche Patentschrift Nr. 459 150;German Patent No. 459 150;

österreichische Patentschrift Nr. 126 709;Austrian Patent No. 126 709;

französische Patentschrift Nr. 40 289, 2. Zus. zur franz. Patentschrift Nr. 711446, französische Patentschrift Nr. 40 750, 3. Zus. zur franz. Patentschrift Nr. 711 446;French patent specification No. 40 289, 2nd addition to the French Patent No. 711446, French Patent No. 40 750, 3rd addition to the French U.S. Patent No. 711,446;

Lehrbuch der drahtlosen Telegraphie von J. Zenneckund H. Rukop, 5. A. 1925, S. 841;Textbook of wireless telegraphy by J. Zenneck and H. Rukop, 5th A. 1925, p. 841;

Die Elektronenröhren von H. A. Möller, 1929, Verlag von Franz Vieweg, S. 136 bis 141.The electron tubes by H. A. Möller, 1929, published by Franz Vieweg, pp. 136 to 141.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

' 709 742/5+ 10.57'709 742/5 + 10.57

Claims (1)

PATENTANSPRUCH:PATENT CLAIM: Schaltungsanordnung, insbesondere für Fernsehzwecke, zur Gewinnung der einen bestimmten Mindestwert überschreitenden Amplitudenanteile eines Synchronisierimpulses und zur Unterdrückung der diesen Mindestwert nicht erreichenden Impulsamplituden unter Verwendung einer Röhre, an deren Steuergitter die Synchronisierimpulse über einen in Reihe mit dem Steuergitter angeordneten Kondensator mit positiver Polarität liegen, und eines parallel zur Gitterkathodenstrecke liegenden Widerstandes, dadurch gekennzeichnet, daß die negative Gitterspannung, die notwendig ist, um den Anodenstrom vollständig zu unterbrechen, kleiner ist als die Amplitude der Synchronisierimpulse und daß der Gitterkondensator und der Gitterwiderstand derart bemessen sind, daß jedes Maximum eines Synchronisierimpulses durch den von ihm ausgelösten Gitterstrom in der Röhre' den Kondensator auf eine so hohe Spannung auflädt und die Aufladespannung nur so langsam absinkt, daß zwischen den Synchronisierimpulsen kein Anodenstrom fließt.Circuit arrangement, in particular for television purposes, for obtaining the one specific Amplitude components of a synchronization pulse that exceed the minimum value and for Suppression of the pulse amplitudes that do not reach this minimum value using a tube, on whose control grid the synchronizing impulses via one in series with the control grid arranged capacitor with positive polarity, and one in parallel to the grid cathode distance lying resistor, characterized in that the negative grid voltage, which is necessary to completely interrupt the anode current, is smaller than the amplitude of the synchronizing pulses and that the grid capacitor and the Grid resistance are dimensioned such that each maximum of a synchronizing pulse by the grid current it triggers in the tube 'raises the capacitor to such a high level The voltage is charging and the charging voltage only drops so slowly that between the synchronization pulses no anode current flows.
DEE2372D 1933-02-10 1934-02-11 Circuit arrangement for obtaining the amplitudes of a synchronizing pulse which exceed a certain minimum value Expired DE967256C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB967256X 1933-02-10

Publications (1)

Publication Number Publication Date
DE967256C true DE967256C (en) 1957-10-31

Family

ID=10805306

Family Applications (1)

Application Number Title Priority Date Filing Date
DEE2372D Expired DE967256C (en) 1933-02-10 1934-02-11 Circuit arrangement for obtaining the amplitudes of a synchronizing pulse which exceed a certain minimum value

Country Status (1)

Country Link
DE (1) DE967256C (en)

Cited By (1)

* 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE459150C (en) * 1922-07-21 1928-05-03 Radio Electr Soc Fr Method for interference-free reception for wireless transmission
FR711446A (en) * 1930-05-21 1931-09-09 Cfcmug Improvements to synchronized transmitting and receiving systems for television, telecine, telemechanics and other applications
AT126709B (en) * 1930-02-01 1932-02-10 Siemens Ag Receiving device for carrier current telegraphy, especially for pulse amplification with holding current.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE459150C (en) * 1922-07-21 1928-05-03 Radio Electr Soc Fr Method for interference-free reception for wireless transmission
AT126709B (en) * 1930-02-01 1932-02-10 Siemens Ag Receiving device for carrier current telegraphy, especially for pulse amplification with holding current.
FR711446A (en) * 1930-05-21 1931-09-09 Cfcmug Improvements to synchronized transmitting and receiving systems for television, telecine, telemechanics and other applications
FR40289E (en) * 1930-05-21 1932-06-08 Cfcmug Improvements to synchronized transmitting and receiving systems for television, telecine, telemechanics and other applications
FR40750E (en) * 1930-05-21 1932-08-22 Cfcmug Improvements to synchronized transmitting and receiving systems for television, telecine, telemechanics and other applications

Cited By (1)

* 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

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