DE551783C - Transmitter circuit with screen grid tubes, in which the modulation voltage is fed to the screen grid electrode - Google Patents

Transmitter circuit with screen grid tubes, in which the modulation voltage is fed to the screen grid electrode

Info

Publication number
DE551783C
DE551783C DER80541D DER0080541D DE551783C DE 551783 C DE551783 C DE 551783C DE R80541 D DER80541 D DE R80541D DE R0080541 D DER0080541 D DE R0080541D DE 551783 C DE551783 C DE 551783C
Authority
DE
Germany
Prior art keywords
screen grid
fed
transmitter circuit
modulation voltage
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
DER80541D
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
Publication date
Priority to DER80541D priority Critical patent/DE551783C/en
Application granted granted Critical
Publication of DE551783C publication Critical patent/DE551783C/en
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
    • H03C1/24—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to different grid

Landscapes

  • Transmitters (AREA)

Description

Die Erfindung betrifft einen Sender für draht lose Signale. Es sind Senderschaltungen mit Schirmgitterröhren bekannt geworden, bei welchen der Schirmgitterelektrode eine Modulätionsspannung zugeführt wird.The invention relates to a transmitter for wireless signals. There are transmitter circuits with Screen grid tubes have become known in which the screen grid electrode has a modulation voltage is fed.

Die Erfindung beschreibt eine Schaltung, bei der die Anwendung von Modulationsdrosselspulen mit einem schweren Eisenkern nicht erforderlich ist und zugleich der Vorteil einer gewöhnlichen Anodenspannungs-Modulationsschaltung ausgenützt wird, welcher darin besteht, daß die der Generatorröhre parallel liegende Modulationsröhre als Belastungsausgleich auf die Energiequelle wirkt. Erfindungsgemäß ist die Schirmgitterelektrode über einen hochohmigen Widerstand mit der Anode eines Modulationsrohres verbunden, die ihrerseits über einem Widerstand an der Anodenspannungsquelle der Schirmgitterröhre liegt. Die Erfindung ist an einem Ausführungsbeispiel in der Abbildung dargestellt. The invention describes a circuit in which the use of modulating reactors having a heavy iron core is not required and at the same time has the advantage of a ordinary anode voltage modulation circuit is used, which consists in that the modulation tube lying parallel to the generator tube as a load compensation acts on the energy source. According to the invention, the screen grid electrode has a high resistance Resistance connected to the anode of a modulation tube, which in turn is connected to the anode voltage source via a resistor the screen grid tube lies. The invention is shown in one embodiment in the figure.

Die Vierelektrodenröhre 1 erzeugt in bekannter Weise Schwingungen, deren Frequenz durch die Konstanten des an die Anode 2 und die Kathode 3 angeschlossenen Kreises bestimmt wird. Dieser Kreis enthält den Schwingkreis, bestehend aus der Spule 4 und dem Drehkondensator 5, die über die Hochspannungswicklung 6 eines Gleichstromgenerators 27 parallel geschaltet wird. Dieser Schwingkreis ist mit einer Induktanz 7 gekoppelt, die in der Antenne 8G liegt.The four-electrode tube 1 generates vibrations in a known manner, the frequency of which is determined by the constants of the circuit connected to the anode 2 and the cathode 3. This circuit contains the oscillating circuit, consisting of the coil 4 and the variable capacitor 5, which is connected in parallel via the high-voltage winding 6 of a direct current generator 27. This resonant circuit is coupled to an inductor 7, which is an 8-G in the antenna.

Der Gitterkreis von 1 besteht aus einer Hochfrequenzspule 9 in Reihe mit dem Kondensator 10, zu dem ein hoher Widerstand 11 im Nebenschluß liegt, welche Drossel 9 über den Widerstand 12 an Steuergitter 13 und Kathode 3 angeschlossen ist. Zur Aufrechterhaltung der Schwingungen ist zwischen Gitter 13 und das 4-0 eine Ende der Spule 4 der Kondensator 14 geschaltet. The grid circle of Figure 1 consists of a high frequency coil 9 in series with the capacitor 10, to which a high resistance 11 in Shunt is which choke 9 via the resistor 12 to the control grid 13 and cathode 3 connected. To maintain the vibrations is between the grid 13 and the 4-0 one end of the coil 4 of the capacitor 14 is connected.

Die Modulationsfrequenzen werden durch ein Mikrophon 15 geliefert, das zwischen dem Steuergitter 17 und der Kathode 18 des Modulationsfrequenzverstärkers 19 in Reihe mit dem Widerstand 16 liegt.The modulation frequencies are supplied by a microphone 15 which is placed between the Control grid 17 and the cathode 18 of the modulation frequency amplifier 19 is in series with the resistor 16.

Die an der Anode 20 erscheinende Modulationsfrequenz wird der Raumladungselektrode 21 der Röhre 1 über einen Widerstand 22 zugeführt. Zur Verhinderung des Übertretens der am Gitter 21 auftretenden hochfrequenten Schwingungen in dem Modulationsverstärker 19 dient der Kondensator 23.The modulation frequency appearing at the anode 20 becomes the space charge electrode 21 is fed to the tube 1 via a resistor 22. To prevent the violation of the high-frequency oscillations occurring at the grating 21 in the modulation amplifier 19 the capacitor 23 is used.

Der Anodenraumstrom in der Röhre 19 wird von der Hochspannungswicklung 6 über einen Widerstand 24 entnommen. Der Heizstrom wird direkt von der Batterie 20 entnommen, wenn der Schalter 26 geschlossen ist. Diese Stromquelle 25 liefert auch den Strom für die Maschine 27. 29 ist ein Heizwiderstand, 30 eine Sicherung, 31 ein Kondensator parallel zur Wicklung 6.The anode space current in the tube 19 is from the high-voltage winding 6 via a Resistance 24 removed. The heating current is taken directly from the battery 20, when switch 26 is closed. This power source 25 also supplies the power for the Machine 27. 29 is a heating resistor, 30 is a fuse, 31 is a capacitor in parallel with Winding 6.

Bei geschlossenem Schalter 26 wird der Motor 27 in Betrieb gesetzt. Gleichzeitig werden die Heizfäden beheizt und hohe Spannung den Anoden von der Wicklung 6 zugeführt, während die Widerstände 16 und 12 die erforderliche Vorspannung für die Steuerelektroden liefern. Wegen der Kopplung zwischen dem Anoden- und Kathodenkreis der Generator röhre 1 werden Schwingungen erzeugt, deren' Frequenz durch den Schwingkreis 4, 5 bestimmt wird. Diese Schwingungen werden durch das Mikrophon 15 moduliert und dann die so modulierte Energie
strahlt.When the switch 26 is closed, the motor 27 is put into operation. At the same time, the filaments are heated and high voltage is supplied to the anodes from the winding 6, while the resistors 16 and 12 supply the necessary bias voltage for the control electrodes. Because of the coupling between the anode and cathode circuit of the generator tube 1, vibrations are generated whose 'frequency is determined by the resonant circuit 4, 5. These vibrations are modulated by the microphone 15 and then the energy so modulated
shine.

von der Antenne 8, yG ausge-from the antenna 8, y G

Claims (1)

Patentanspruch :Claim: Senderschaltung mit Schirmgitterröhre, bei welcher der Schirmgitterelektrode die Modulationsspannung zugeführt wird, dadurch gekennzeichnet, daß die Schirmgitterelektrode über einen hochohmigen Widerstand mit der Anode eines Modulationsrohres verbunden ist, die ihrerseits über einem Widerstand an der Anodenspannungsquelle der Schirmgitterröhre liegt.Transmitter circuit with screen grid tube, in which the screen grid electrode is the Modulation voltage is supplied, characterized in that the screen grid electrode is connected to the anode of a modulation tube via a high-resistance resistor, which in turn is connected via a resistor at the anode voltage source of the screen grid tube. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DER80541D Transmitter circuit with screen grid tubes, in which the modulation voltage is fed to the screen grid electrode Expired DE551783C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER80541D DE551783C (en) Transmitter circuit with screen grid tubes, in which the modulation voltage is fed to the screen grid electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER80541D DE551783C (en) Transmitter circuit with screen grid tubes, in which the modulation voltage is fed to the screen grid electrode

Publications (1)

Publication Number Publication Date
DE551783C true DE551783C (en) 1932-06-04

Family

ID=7416308

Family Applications (1)

Application Number Title Priority Date Filing Date
DER80541D Expired DE551783C (en) Transmitter circuit with screen grid tubes, in which the modulation voltage is fed to the screen grid electrode

Country Status (1)

Country Link
DE (1) DE551783C (en)

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