DE755140C - Television receiving circuit for the reintroduction of the average picture brightness - Google Patents

Television receiving circuit for the reintroduction of the average picture brightness

Info

Publication number
DE755140C
DE755140C DER85803D DER0085803D DE755140C DE 755140 C DE755140 C DE 755140C DE R85803 D DER85803 D DE R85803D DE R0085803 D DER0085803 D DE R0085803D DE 755140 C DE755140 C DE 755140C
Authority
DE
Germany
Prior art keywords
voltage
tube
grid
anode
image
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
DER85803D
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Priority claimed from GB2537433A external-priority patent/GB413894A/en
Application granted granted Critical
Publication of DE755140C publication Critical patent/DE755140C/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)
  • Direct Current Feeding And Distribution (AREA)
  • Details Of Television Scanning (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Picture Signal Circuits (AREA)
  • Television Systems (AREA)

Description

Es ist vorgeschlagen worden, beim Fernsehen die sog. Gieichstromkomponente des von der Photogene des Senders gelieferten Stroms, die der mittleren Bildhelligkeit entspricht, nicht mitzuübertragen, sondern auf der Empfangsseite der Bildwiedergabeeinrichtung eine Gleichspannung zuzuführen, die von Hand laufend derart eingestellt wird, so daß im Empfangsbild die mittlere Bildhelligkeit ίο wenigstens annähernd richtig wiedergegeben wird. Es ist ferner vorgeschlagen worden, inIt has been proposed that the so-called DC component of the current supplied by the photogen of the transmitter, which corresponds to the average image brightness, should not be transmitted with television, but rather to supply a DC voltage on the receiving side of the image display device, which is continuously set by hand in such a way that the Received image the mean image brightness ίο is reproduced at least approximately correctly. It has also been suggested in

Abhängigkeit von beim Sender erfolgenden periodischen Unterbrechungen des Photozellenstroms durch selbsttätige Mittel auf der Empfangsseite eine Spannung zu erzeugen, die der sog. Gleichstromkomponente auf der Senderseite entspricht, und diese Spannung zusammen mit den übertragenen Wechselspannungskomponenten des Bildes der Bildwiedergabeeinrichtung zuzuführen.Depending on the periodic interruptions of the photocell current at the transmitter to generate a voltage by automatic means on the receiving side, which corresponds to the so-called direct current component on the Corresponding to the transmitter side, and this voltage together with the transmitted AC voltage components of the image to the image display device.

Die Erfindung besteht nun darin, zur Wiedereinführung der mittleren BildhelligkeitThe invention now consists in reintroducing the average image brightness

in den aus den Wechselkomponenten der Helligkeitsverteilung bestehenden Bildstrom in Abhängigkeit von den Bildsignalspannungen, die den hellsten Bildstellen entsprechen, eine Spannung zu erzeugen, die zu den übertragenen Wechselkomponenten des Bildinhalts addiert wird. Es wird dabei von der näherungsweise gültigen Voraussetzung ausgegangen, daß die mittlere Bildhelligkeit proportional den in der Weißrichtung liegenden maximalen Spannungsamplituden ist, gerechnet von der Nullachse der übertragenen Bildwechselspannungen aus.in the image stream consisting of the alternating components of the brightness distribution in Dependence on the image signal voltages that correspond to the brightest image areas, to generate a voltage that contributes to the transmitted alternating components of the image content is added. It is based on the approximately valid requirement, that the mean image brightness is proportional to that lying in the white direction is the maximum voltage amplitudes, calculated from the zero axis of the transmitted alternating image voltages the end.

Die Abb. ι stellt eine Ausführungsform der Erfindung bei einer Fernsehempfangseinrichtung mit Braunscher Röhre dar. Darin bedeutet io einen Hochfrequenzverstärker einschließlich einer Gleichrichterstufe, welche die aus den Wechselkomponenten des BiIdinhalts und aus Synchronimpulsen, die in der sog. Schwarzrichtung liegen mögen und sich vom Bildinhalt durch ihre Amplitude unterscheiden, bestehende Spannung liefert. Die in diesem Fall unter der Spannung der dunkelsten z5 Bildstelle liegenden Synchronimpulse beeinflussen die mit entsprechenden Vo>rspannungen an ihren Eingangsröhren ausgerüsteten Sägezahngeneratoren 16 und 18, die in den Ablenkspulen: ιγ und 19 der Kathodenstrahlröhre 13 sägezahnförmige Ströme für den Zeilen- und den Bildwechsel erzeugen. Am Widerstand 11 tritt das gesamte aus den Wechselkomponenten der Bildhelligkeitsverteilung und aus den Synchronimpulsen bestehende Signalgemisch auf. Dieses wird dem mit Kondensatoren und mit einem Gitterableitwiderstand versehenen Gitterkreis der Verstärkerröhre 21 zugeführt, und zwar so, daß die in der Weißrichtung liegenden Bildamplituden das Gitterpotential der Röhre zunächst in positiver Richtung verlagern. Dies soll in der Rohre 21 zu einem Gitterstrom führen, der die im Gitterkreis liegenden Kondensatoren auflädt, die sich dann über den Gitterableitwiderstand langsam wieder entladen. Das mittlere Anodenpotential der Röhre 21 steigt dabei dann an, wenn die Aufladung der Kondensatoren im Gitterkreis so weit vor sich geht, daß die maximalen Bildamplituden z. B. gerade die Gitterspannung Null erzeugen. An der Anode der Röhre 21 tritt ebenfalls der gesamte aus den Wechselkomponenten der Bildhelligkeitsverteilung und den Synchronimpulsen bestehende Spannungsverlauf auf. Da jedoch der Widerstand 23 und der Kondensator 24 für alle an der Anode der Röhre auftretenden Wechselspannungskomponenten als Siebkette wirken, sind im Punkt 22 also praktisch nur noch die Gleichspannungs-Schwankungen der Anode der Röhre 21 vorhanden. An den Punkt 22 wird aber gleichzeitig über den bereits erwähnten Kondensator 24 die am Anzapfpunkt des Widerstands 11 herrschende gesamte Signalspannung übertragen, SO' daß an der mit diesem Punkt verbundenen Steuerelektrode 12 derBraunschen Röhre sowohl die Wechselspannungskomponenten des Bildinhalts als auch eine die mittlere Bildhelligkeit näherungsweise wiedergebende Gleichspannung wirksam ist. Daher zeichnet der Kathodenstrahl 14 auf dem Leuchtschirm 15 das Empfangsbild mit Einschluß der mittleren Bildhelligkeit fast naturgetreu auf.The Fig. Ι shows an embodiment of the invention in a television receiving device with a Braunschweig tube. Therein io means a high-frequency amplifier including a rectifier stage, which consists of the alternating components of the picture content and sync pulses that may lie in the so-called black direction and differ from the picture content differ in their amplitude, supply existing voltage. In this case, the synchronous pulses, which are under the voltage of the darkest z5 image area, influence the sawtooth generators 16 and 18, which are equipped with corresponding pre-voltages at their input tubes, which generate sawtooth-shaped currents in the deflection coils: ιγ and 19 of the cathode ray tube 13 for the line and image changes . The entire signal mixture consisting of the alternating components of the image brightness distribution and the synchronizing pulses occurs at the resistor 11. This is fed to the grid circuit of the amplifier tube 21, which is provided with capacitors and a grid leakage resistor, in such a way that the image amplitudes lying in the white direction initially shift the grid potential of the tube in the positive direction. This should lead to a grid current in the tube 21, which charges the capacitors located in the grid circuit, which then slowly discharge again via the grid bleeder resistor. The mean anode potential of the tube 21 rises when the charging of the capacitors in the grid circle goes so far that the maximum image amplitudes z. B. just generate the grid voltage zero. The entire voltage curve consisting of the alternating components of the image brightness distribution and the synchronizing pulses also occurs at the anode of the tube 21. However, since the resistor 23 and the capacitor 24 act as a chain of filters for all AC voltage components occurring at the anode of the tube, practically only the DC voltage fluctuations of the anode of the tube 21 are present at point 22. At the point 22, however, the entire signal voltage prevailing at the tapping point of the resistor 11 is simultaneously transmitted via the aforementioned capacitor 24, SO 'that both the AC voltage components of the image content and an approximate average image brightness at the control electrode 12 of the Braun tube connected to this point DC voltage is effective. The cathode ray 14 therefore records the reception image on the fluorescent screen 15, including the mean image brightness, almost true to life.

Die Abb. 2 veranschaulicht eine Ausführungsform, bei der zur Bildwiedergabe eine im Anodenkreis einer Verstärkerröhre 26 liegende Glimmlampe 25 benutzt wird. Im übrigen entspricht die Anordnung derjenigen nach Anspruch i, und insbesondere gilt auch hinsichtlich der im Punkt 22 wirksamen Spannungen das an Hand der Abb. 1 Gesagte. Der Strom durch die Glimmlampe 25 ist dabei den Spannungen im Punkt 22 proportional, so daß also das mit einer mechanischen Vorrichtung zur Bildzusammensetzung erzeugte Empfangsbild die mittlere Bildhelligkeit ebenfalls fast naturgetreu egthält.Fig. 2 illustrates an embodiment in which a Glow lamp 25 located in the anode circuit of an amplifier tube 26 is used. Otherwise the arrangement corresponds to that according to claim i, and in particular also applies with regard to the stresses effective in point 22 what has been said on the basis of Fig. 1. The current through the glow lamp 25 is the Tensions at point 22 proportional, so that with a mechanical device for image composition, the reception image also produced almost the average image brightness true to nature.

Claims (3)

Patentansprüche:Patent claims: i. Fernsehempfangsschaltung zur Wiedereinführung der mittleren Bildhelligkeit in einen Spannungsverlauf, der nur die Wechselkomponenten der Helligkeitsverteilung enthält, dadurch gekennzeichnet, daß zu den insgesamt übertragenen Wechselkomponenten eine Spannung hinzugefügt wird, die von den den übertragenen hellsten Bildstellen 'entsprechenden elektrischen Werten abgeleitet wird.i. Television receiving circuit for the reintroduction of the average picture brightness into a voltage curve that only contains the alternating components of the brightness distribution contains, characterized in that a voltage is added to the alternating components transmitted as a whole the corresponding of the brightest image areas transmitted ' electrical values is derived. 2. Anordnung nach Anspruch i, gekennzeichnet durch eine in ihrem Eingangskreis mit Kondensatoren und Gitterableitwiderstand versehene Röhre (21), der das gesamte empfangene Signalgemisch derart zugeführt wird, daß die weißen Bildstellen das Gitterpotential in positiver Richtung verlagern, somit eine Aufladung der Gitterkondensatoren erzeugen und dadurch an ihrer Anode eine zusätzliche Gleichspannung hervorrufen, die an einer geeigneten Stelle des Anodenkreises (im Punkt 22) als der mittleren Bildhelligkeit entsprechende Spannung zu den Wechselkomponenten hinzugefügt wird.2. Arrangement according to claim i, characterized through a tube (21) provided in its input circuit with capacitors and a grid leakage resistor, the entire received composite signal is fed in such a way that the white image areas shift the grid potential in a positive direction, thus generating a charge of the grid capacitors and thereby cause an additional DC voltage at their anode, which is applied to a suitable Place the anode circle (at point 22) as the voltage corresponding to the mean image brightness to the alternating components will be added. 3. Einrichtung nach Anspruch 2, dadurch gekennzeichnet, daß an dem im Anodenkreis der Gleichrichterröhre (21) liegenden Kontakt (22), an welchem die der mittleren Bildhelligkeit entsprechende Spannung zu den Wechselkomponenten3. Device according to claim 2, characterized in that the im Anode circle of the rectifier tube (21) lying contact (22), on which the corresponding to the mean image brightness Voltage to the interchangeable components hinzugefügt wird, entweder die Steuerelektrode (12) einer Braunschen Röhre (13) oder das Steuergitter einer Verstärkerröhre (26) angeschlossen ist, die in ihrem Anodenkreis eine Bildwiedergabeglimmlampe (25) enthält.is added, either the control electrode (12) of a Braun tube (13) or the control grid of an amplifier tube (26) is connected, which is shown in its anode circuit contains an image display glow lamp (25). Zur Abgrenzung des Erfmdungsgegenstarids vom Stand der Technik sind im Erteilungsverfahren folgende Druckschriften in Betracht gezogen worden:To delimit the contradiction of the invention From the state of the art, the following publications are considered in the granting procedure been drawn: Deutsche Patentschrift Nr. 482 874; österreichische Patentschrift Nr. 113936.German Patent No. 482 874; Austrian patent specification No. 113936. Hierzu 1 Blatt Zeichnungen1 sheet of drawings ©5750 2.53© 5750 2.53
DER85803D 1931-09-26 1932-09-03 Television receiving circuit for the reintroduction of the average picture brightness Expired DE755140C (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
DE755140C true DE755140C (en) 1953-03-09

Family

ID=31950339

Family Applications (2)

Application Number Title Priority Date Filing Date
DER85803D Expired DE755140C (en) 1931-09-26 1932-09-03 Television receiving circuit for the reintroduction of the average picture brightness
DER88042D Expired DE648195C (en) 1931-09-26 1933-05-30 Arrangement for the generation of a current with a saw tooth shape for the magnetic deflection of cathode rays

Family Applications After (1)

Application Number Title Priority Date Filing Date
DER88042D Expired DE648195C (en) 1931-09-26 1933-05-30 Arrangement for the generation of a current with a saw tooth shape for the magnetic deflection of cathode rays

Country Status (6)

Country Link
US (1) US2289914A (en)
BE (12) BE391266A (en)
DE (2) DE755140C (en)
FR (3) FR699544A (en)
GB (2) GB408656A (en)
NL (2) NL61555B (en)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE402568A (en) * 1933-04-13
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
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
BE418067A (en) * 1935-10-25
US2140004A (en) * 1936-02-03 1938-12-13 Rca Corp Electrical oscillation generator
GB479113A (en) * 1936-04-29 1938-01-31 Alan Dower Blumlein Improvements in or relating to thermionic valve circuits particularly for use in television
GB479760A (en) * 1936-08-10 1938-02-10 Baird Television Ltd Improvements in or relating to television and like systems
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
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
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
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

Citations (2)

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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

Patent Citations (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

Also Published As

Publication number Publication date
BE377922A (en)
BE395907A (en)
FR39840E (en) 1932-03-24
US2289914A (en) 1942-07-14
BE398015A (en)
DE648195C (en) 1937-07-24
BE390958A (en)
BE389285A (en)
FR699544A (en) 1931-02-16
NL61555B (en)
BE371688A (en)
BE390395A (en)
GB408656A (en) 1934-04-09
BE393588A (en)
GB401990A (en) 1933-11-23
BE396560A (en)
BE387822A (en)
FR741099A (en) 1933-02-04
BE391266A (en)
BE371659A (en)
NL39554C (en)

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