AT97521B - Circuit for multiple transmission and multiple reception using radio frequency waves. - Google Patents

Circuit for multiple transmission and multiple reception using radio frequency waves.

Info

Publication number
AT97521B
AT97521B AT97521DA AT97521B AT 97521 B AT97521 B AT 97521B AT 97521D A AT97521D A AT 97521DA AT 97521 B AT97521 B AT 97521B
Authority
AT
Austria
Prior art keywords
circuit
radio frequency
frequency waves
reception
transmission
Prior art date
Application number
Other languages
German (de)
Original Assignee
Huth Erich F Gmbh
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 Huth Erich F Gmbh filed Critical Huth Erich F Gmbh
Application granted granted Critical
Publication of AT97521B publication Critical patent/AT97521B/en

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  • Transmitters (AREA)
  • Electronic Switches (AREA)

Description

  

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   kopplungsschaltung zusammen   mit dem zwischen Anoden und Glühfaden   hebenden   Schwingungskreis in bekannter Weise als Schwingungserzeuger. Die Gitter 7 und die Anoden 6 sind durch einen Widerstand   1.   a verbunden, dem eine Kapazität 16 parallel geschaltet ist und der als   Ableitungswiderstand   wirkt, wobei mit dem Widerstand in Reihe eine Spule 17 liegt, welche die Sekundärspule eines Transformators bildet. Der Transformator weist z. B. drei Primärspulen 18, 19, 20 auf, deren jede in einem Zeichengeberkreis mit Wechselstromquelle von Audionfrequenz 24 bzw. 25 oder 26 und Taste 21 bzw. 20 bzw.   23 liegt.   Je nach der Zahl der Zeichengeberkreise ist die Zahl der Primärwindungen des Transformators zu wählen.

   Wenn der Generator 26 einen Strom von   Audionfrequenz   300 und der Generator 25 von 420 und Generator 24 von 570 gibt, so wird beim   Schliessen   der Taste   23   die Amplitude der von der Antenne 1 ausgestrahlten Energie 300mal in der Sekunde variiert, indem sie vorzugsweise einer harmonischen oder Sinuswellenform folgt. Ähnlich wird durch die Taste 22 die Amplitude   420mal   in der Sekunde und durch Taste 21 die Amplitude 570malin der Sekunde variiert.

   Wenn zwei oder alle drei dieser Tasten gleichzeitig geschlossen werden, so wird die   Amplitudenkurve   der von Antenne 1 ausgestrahlten Energie eine zusammengesetzte, die von den zwei oder drei Sinuswellenkurven der zwei oder drei beteiligtenFrequenzen und aus der eben zufällig zwischen den Generatoren 24, 25, 26 bestehenden Phasenbezichung gebildet wird. 



   In Fig. 2 ist der zur   Schwingungserzeugung dien nde   Teil des Schaltung der gleiche, wie bei Eig. 1, 
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 geberkreis ein besonderer   Transformator   vorgesehen. In Fig. 2 sind 2 Zeichengeberkreise angeordnet, die aber durch die   Transformatoren 3J'bzw. 32   an den   Sehwingungserzeuger   angesehlossen sind. Ferner 
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   Coupling circuit together with the oscillation circuit lifting between the anodes and the filament in a known manner as a vibration generator. The grids 7 and the anodes 6 are connected by a resistor 1. a, to which a capacitance 16 is connected in parallel and which acts as a leakage resistor, with a coil 17 in series with the resistor, which forms the secondary coil of a transformer. The transformer has z. B. three primary coils 18, 19, 20, each of which is located in a character generator circuit with an alternating current source of audio frequency 24 or 25 or 26 and key 21 or 20 or 23. The number of primary turns of the transformer is to be selected depending on the number of signaling circuits.

   If the generator 26 gives a current of audio frequency 300 and the generator 25 of 420 and generator 24 of 570, when the button 23 is closed, the amplitude of the energy emitted by the antenna 1 is varied 300 times a second, preferably by a harmonic or Sine waveform follows. Similarly, key 22 varies the amplitude 420 times per second and key 21 varies the amplitude 570 times per second.

   If two or all three of these keys are closed at the same time, the amplitude curve of the energy emitted by antenna 1 becomes a composite of the two or three sine wave curves of the two or three frequencies involved and that which just happens to exist between the generators 24, 25, 26 Phase designation is formed.



   In Fig. 2, the part of the circuit serving to generate vibrations is the same as in Eig. 1,
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 encoder circuit a special transformer is provided. In Fig. 2 2 signal generator circuits are arranged, but the transformers 3J'bzw. 32 are attached to the visual vibration generator. Further
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AT97521D 1917-09-22 1921-08-29 Circuit for multiple transmission and multiple reception using radio frequency waves. AT97521B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US97521XA 1917-09-22 1917-09-22

Publications (1)

Publication Number Publication Date
AT97521B true AT97521B (en) 1924-07-25

Family

ID=21739485

Family Applications (1)

Application Number Title Priority Date Filing Date
AT97521D AT97521B (en) 1917-09-22 1921-08-29 Circuit for multiple transmission and multiple reception using radio frequency waves.

Country Status (1)

Country Link
AT (1) AT97521B (en)

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