DE489942C - Circuit for either the transmission of audio frequencies or modulated unattenuated waves - Google Patents
Circuit for either the transmission of audio frequencies or modulated unattenuated wavesInfo
- Publication number
- DE489942C DE489942C DES81647D DES0081647D DE489942C DE 489942 C DE489942 C DE 489942C DE S81647 D DES81647 D DE S81647D DE S0081647 D DES0081647 D DE S0081647D DE 489942 C DE489942 C DE 489942C
- Authority
- DE
- Germany
- Prior art keywords
- circuit
- tube
- modulated
- waves
- transmission
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/12—Modulator circuits; Transmitter circuits
-
- 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
- H03C1/20—Amplitude modulation by means of discharge device having at least three electrodes carrier applied to control grid modulating signal applied to anode
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Devices For Supply Of Signal Current (AREA)
Description
Die Erfindung betrifft eine einfache Schaltung, um wahlweise mittels eines Telephonie-Röhrensenders mit Modulatorröhre Gesprochenes oder modulierte ungedämpfte Wellen aussenden zu können. Man erhält so einen Röhrensender, der gleich gut für die Zwecke der Übertragung der Sprache, Musik o. dgl. und für die Zwecke der Zeichengebung benutzbar ist.The invention relates to a simple circuit to selectively by means of a telephony tube transmitter to be able to emit spoken or modulated undamped waves with a modulator tube. You get one like that Tube transmitter that works equally well for the purpose of transmitting speech, music or the like. and can be used for the purposes of signaling.
Gemäß der Erfindung ordnet man einen in seiner einen Stellung das Gitter der Modulatorröhre mit dem Besprechungskreis und in seiner anderen Stellung das Gitter der Modulatorröhre mit einem zur Erzeugung ungedämpfter hörfrequenter Schwingungen ausschließlich elektrisch mit dem Anodenkreis in Rückkopplung geschalteten Schwingungskreis verbindenden Umschalter an.According to the invention, the grid of the modulator tube is arranged in its one position with the discussion group and in its other position the grid of the Modulator tube with one for generating undamped auditory frequency vibrations exclusively Oscillating circuit electrically connected in feedback with the anode circuit connecting switch on.
Die Abbildung veranschaulicht das Schema einer zur Ausübung des erfindungsgemäßen Verfahrens anwendbaren einfachen Schaltung, bei der die Modulierung durch die sogenannte Anodensteuerung bewirkt wird. Mit 1 ist die Hochspannungs- oder Anodenstromquelle, mit 2 die Niederspannungs- oder Heizstromquelle, mit 3 die Hochfrequenzschwingungen erzeugende Röhre und mit 4 die Modulatorröhre bezeichnet. 5 ist eine in der Verbindungsleitung der Anoden der Röhren 3 und 4 liegende Drosselspule, 6 ein Übertragungswandler, 7 ein einstellbarer Kondensator, 8 ein vergleichsweise hoher Widerstand mit Überbrückungskondensator zum Zwecke, das Gitter der Modulatorröhre 4 negativ zu laden und 9 der Besprechungskreis mit einem Mikrophon ι ο und einer Stromquelle 11. Erfindungsgemäß ist in der Gitterzuleitung der Modulatorröhre 4 ein Umschalter 12 angeordnet, der die Ausnutzung des Senders wahlweise für Telephonie- und für Telegraphiezwecke ermöglicht.The figure illustrates the scheme of a for practicing the invention Method applicable simple circuit in which the modulation by the so-called Anode control is effected. With 1 is the high voltage or anode power source, with 2 the low-voltage or heating current source, with 3 the high-frequency oscillations generating tube and 4 denotes the modulator tube. 5 is one in the connecting line the anodes of the tubes 3 and 4 lying choke coil, 6 a transmission converter, 7 an adjustable capacitor, 8 a comparatively high resistance with a bypass capacitor for the purpose of that Grid of the modulator tube 4 negative load and 9 the meeting circle with one Microphone ι ο and a power source 11. According to the invention a changeover switch 12 is arranged in the grid feed line of the modulator tube 4, the utilization of the transmitter either for telephony and for telegraphy purposes enables.
Befindet sich der bewegliche Teil des Umschalters 12 in der gezeichneten Stellung, so ist das Gitter der Modulatorröhre· 4 mit dem Besprechungskreis 9 verbunden, und man hat einen Telephoniesender, dessen Hochfrequenzgenerator 3 durch Anodensteuerung gemäß der durch Besprechung der Membran des Mikrophons 10 hervorgerufenen hörfrequenten Wellenzüge moduliert wird. Die Röhre 4 wirkt hierbei als Verstärker des Mikrophonstromes und ändert ihm entsprechend die Anodenspannung und damit die Leistung der Röhre 3.If the movable part of the switch 12 is in the position shown, so the grid of the modulator tube x 4 is connected to the conference circuit 9, and one has a telephone transmitter whose high frequency generator 3 is controlled by anode according to FIG the hearing frequencies caused by the discussion of the membrane of the microphone 10 Wave trains is modulated. The tube 4 acts here as an amplifier of the microphone current and accordingly changes the anode voltage and thus the output of the tube 3.
Beim Umlegen des Schalters 12 wird die Modulatorröhre 4 zum Erzeuger von Schwingungen, deren Frequenz durch die Konstanten des Schwingungskreises bestimmt istWhen the switch 12 is flicked, the modulator tube 4 is used to generate vibrations, whose frequency is determined by the constants of the oscillation circuit
und beispielsweise mittels des Kondensators 7 geregelt werden kann. Die an den Klemmen der im Zuge der Anodenleitung liegenden Wicklung des Wandlers 6 entstehende Spannung überlagert sich der von der Anodenstromquelle gelieferten Spannung, und die in der .Röhre 3 erzeugten Schwingungen werden mit ungedämpften Wellen von der eingestellten Frequenz moduliert, so daß also jetzt ein Telegraphiesender vorliegt.and can be regulated, for example, by means of the capacitor 7. The ones on the clamps the voltage generated in the course of the anode line winding of the transducer 6 superimposed on the voltage supplied by the anode power source, and the Vibrations generated in the tube 3 are set with undamped waves from the Frequency modulated so that there is now a telegraph transmitter.
Man kann, ohne das Wesen der Erfindung zu verlassen, die beispielsweise veranschaulichte Schaltung in verschiedener Weise für die Ausübung des neuen Verfahrens abändern, bei dem eine Rückkopplung zwischen den Gitter- und Anodenkreisen der gewöhnlich für Telephoniezwecke benutzten 'Modulatorröhre diese für hörfrequente Schwingungen selbsterregend macht und bei dem man die Wellenlänge dieser Schwingungen durch Wahl der elektromagnetischen Konstanten des von der Röhre selbsterregten Kreises einstellen kann.One can without departing from the essence of the invention that exemplified Modify the circuit in various ways to carry out the new procedure, where a feedback between the grid and anode circuits is common for telephony purposes' modulator tubes used these for auditory frequency oscillations self-exciting and in which one determines the wavelength of these vibrations by choosing the electromagnetic constants of the self-excited circuit of the tube.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US99740A US1755386A (en) | 1925-08-10 | 1926-04-05 | Vacuum-tube generator system |
US423308A US2006440A (en) | 1926-04-05 | 1930-01-25 | Vacuum tube generator system |
Publications (1)
Publication Number | Publication Date |
---|---|
DE489942C true DE489942C (en) | 1930-01-22 |
Family
ID=26796434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES81647D Expired DE489942C (en) | 1926-04-05 | 1926-08-10 | Circuit for either the transmission of audio frequencies or modulated unattenuated waves |
Country Status (3)
Country | Link |
---|---|
US (1) | US2006440A (en) |
DE (1) | DE489942C (en) |
NL (1) | NL20201C (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2439844A (en) * | 1943-10-29 | 1948-04-20 | Bendix Aviat Corp | Amplifier and oscillator circuit |
BE468182A (en) * | 1944-04-04 | |||
US2421468A (en) * | 1944-08-25 | 1947-06-03 | Rca Corp | Selective transmitting, receiving, and oscillator circuit |
US2459281A (en) * | 1945-01-08 | 1949-01-18 | Rca Corp | Two-way radio equipment for lifeboat service |
FR960967A (en) * | 1945-02-06 | 1950-04-28 | ||
US2453269A (en) * | 1945-05-21 | 1948-11-09 | Automatic Elect Lab | Printing telegraph system |
US2515254A (en) * | 1946-12-11 | 1950-07-18 | Paul W Nosker | Remote-control system |
US2991357A (en) * | 1959-08-31 | 1961-07-04 | Gen Electric | Amplitude modulated radio frequency transmitter |
US4418416A (en) * | 1981-04-06 | 1983-11-29 | Bell Telephone Laboratories, Incorporated | Frequency modulation transmitter for voice or data |
-
0
- NL NL20201D patent/NL20201C/xx active
-
1926
- 1926-08-10 DE DES81647D patent/DE489942C/en not_active Expired
-
1930
- 1930-01-25 US US423308A patent/US2006440A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
NL20201C (en) | |
US2006440A (en) | 1935-07-02 |
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