DE324981C - Receiving device for electrical vibrations by means of a cathode tube coupled to an oscillation circuit - Google Patents
Receiving device for electrical vibrations by means of a cathode tube coupled to an oscillation circuitInfo
- Publication number
- DE324981C DE324981C DENDAT324981D DE324981DD DE324981C DE 324981 C DE324981 C DE 324981C DE NDAT324981 D DENDAT324981 D DE NDAT324981D DE 324981D D DE324981D D DE 324981DD DE 324981 C DE324981 C DE 324981C
- Authority
- DE
- Germany
- Prior art keywords
- cathode
- receiving device
- cathode tube
- oscillation circuit
- circuit
- 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
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/22—Circuits for receivers in which no local oscillation is generated
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Amplifiers (AREA)
Description
Bekannt ist die Benutzung des Audiöns zum Empfang von elektrischen Schwingungen, bekannt auch die Benutzung desselben in abgestimmten Schwingungskreisen, in welchem Falle der Anodenkreis des Audions Abstimmittel enthält. Die Selektivität derartiger Empfangseinrichtungen ist aber für viele Zwecke nicht ausreichend. Dieser Übelstand macht sich besonders dann geltend, ίο wenn die Schaltungen als Hochfrequenzverstärker, beispielsweise in Verbindung mit Ve1 hältnismäßig kleinen Antennenrahmen, verwendet werden sollen. Der Empfang einer einzigen Welle macht hierbei zwar auch bei den üblichen Schaltungen keine Schwierigkeiten. Bei mehreren verschiedenen Wellen tritt aber beim Suchen ein störendes Pfeifen im Empfänger auf, das die Arbeit des Aufnehmenden erheblich erschwert und das Auffinden leiser Stationen verhindert. Die Folge ist, daß die Schaltungen für ungeübte Bedienungen nur sehr schwer brauchbar sind.It is known to use the audio system to receive electrical vibrations, and it is also known to use the audio system in tuned vibration circuits, in which case the anode circuit of the audio system contains tuning means. The selectivity of such receiving devices is not sufficient for many purposes. This drawback becomes particularly contends ίο when the circuits as a high-frequency amplifier, for example in connection with Ve 1 tively small antenna frame to be used. The reception of a single wave does not cause any difficulties even with the usual circuits. With several different waves, however, an annoying whistling occurs in the receiver when searching, which makes the work of the recorder considerably more difficult and prevents quiet stations from being found. The result is that the circuits are very difficult to use for inexperienced operators.
Die Erfindung hat eine Schaltung zum Gegenstand, die mit einfachsten Abstimmmitteln eine vorzügliche Selektion verbindet. Erreicht wird dies dadurch, daß die Wechselspannung eines von den ankommenden Schwingungen irgendwie erregten Schwingungskreises sowohl in den Kreis »Kathode-Gitter«, wie auch in den Speisestromkreis »Kathode-Anode« eingeführt wird.The subject of the invention is a circuit with the simplest of tuning means an excellent selection connects. This is achieved in that the alternating voltage one of the oscillations somehow excited by the incoming oscillations both in the "cathode grid" circle, as is also introduced into the supply circuit »cathode-anode«.
Die Erfindung ist auf der Zeichnung in einer beispielsweisen Ausführungsform dargestellt. Der den variablen Kondensator 1 und die Selbstinduktion 2 enthaltende Schwingungskreis ist einerseits über Blockkondensatoren 3 und 4 mit der Kathode 5 und dem Gitter 6 der Vakuumröhre 7, anderseits über Widerstände oder Drosselspulen 8 und 9 mit der Anode 10 und der an der Kathode 5 liegenden Anodenstromquelle 11 verbunden. Die Art, wie der Schwingungskreis erregt wird, ist nebensächlich. Es kann beispielsweise eine Antenne an eine Selbstinduktion magnetisch oder galvanisch angcschlossen sein, so daß der Kreis also den Sekundärkreis eines gewöhnlichen Empfängers darstellt, oder es kann auch der Schwingungskreis selbst als Spulenantenne ausgebildet sein.The invention is shown in the drawing in an exemplary embodiment. The one containing the variable capacitor 1 and the self-induction 2 The oscillating circuit is connected to the cathode 5 via block capacitors 3 and 4 and the grid 6 of the vacuum tube 7, on the other hand via resistors or choke coils 8 and 9 with the anode 10 and the anode current source 11 connected to the cathode 5 tied together. The way in which the oscillation circuit is excited is irrelevant. It can For example, an antenna is magnetically or galvanically connected to a self-induction so that the circle thus represents the secondary circuit of an ordinary receiver, or it can also be the oscillation circuit even be designed as a coil antenna.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE324981T |
Publications (1)
Publication Number | Publication Date |
---|---|
DE324981C true DE324981C (en) | 1920-09-08 |
Family
ID=6182424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT324981D Expired DE324981C (en) | Receiving device for electrical vibrations by means of a cathode tube coupled to an oscillation circuit |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE324981C (en) |
-
0
- DE DENDAT324981D patent/DE324981C/en not_active Expired
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