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DE304361C - - Google Patents

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Publication number
DE304361C
DE304361C DENDAT304361D DE304361DA DE304361C DE 304361 C DE304361 C DE 304361C DE NDAT304361 D DENDAT304361 D DE NDAT304361D DE 304361D A DE304361D A DE 304361DA DE 304361 C DE304361 C DE 304361C
Authority
DE
Germany
Prior art keywords
circles
harmonics
cathode tube
those
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.)
Active
Application number
DENDAT304361D
Other languages
German (de)
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.)
Publication of DE304361C publication Critical patent/DE304361C/de
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/08—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance
    • H03B5/10—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising lumped inductance and capacitance active element in amplifier being vacuum tube

Landscapes

  • Control Of High-Frequency Heating Circuits (AREA)
  • Transmitters (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Description

Bei allen Schaltungen der Kathodenröhre zur Schwingungserzeugung entstehen im Schwingungskreise Oberschwingungen, was daran erkannt wird, daß die Stromkurve von der Sinusform abweicht. Diese Oberschwingungen können störende Wirkungen haben. Bei Sendern der drahtlosen Telegraphic ζ. Β., bei denen die Antenne als erregter Kreis mit der Röhre verbunden ist, werden sie in den RaumWith all circuits of the cathode tube for the generation of vibrations arise in the oscillation circuits Harmonics, which is recognized by the fact that the current curve deviates from the sinusoidal shape. These harmonics can have disruptive effects. For wireless telegraphic transmitters ζ. Β., At which the antenna is connected to the tube as an excited circle, they are in the room

ίο ausgestrahlt und bilden dann eine erhebliche Störung für in der Nähe befindliche Empfangsstationen. Gemäß der Erfindung werden besondere Mittel angewendet, um die Oberschwingungen aus den Kreisen, in denen sie nicht erwünscht sind, fernzuhalten.ίο broadcast and then form a substantial Interference for nearby receiving stations. According to the invention are particular Means applied to the harmonics from the circles in which they are are not wanted to keep away.

Ein solches Mittel ist z. B. in Fig. ι der Zeichnung dargestellt. Bei der direkten Schal tung des Röhrensenders wird parallel zu den Anschlußpunkten der Röhrenkopplung A und B ein geschlossener Schwingungskreis S geschaltet und dieser auf die Grundschwingung abgestimmt. Er bildet dann für diese einen unendlich hohen Widerstand und absorbiert daher keine Energie. Für die entstehenden Oberschwingungen aber bildet er einen Kurzschluß, so daß diese nicht zur Antenne gelangen. Wird dieser Kreis auf Wellenlängen geeicht, so kann er zugleich als Wellenmesser dienen.Such a means is e.g. B. shown in Fig. Ι of the drawing. In the direct scarf device of the tube transmitter, a closed oscillation circuit S is connected in parallel to the connection points of the tube coupling A and B and this is tuned to the fundamental oscillation. It then forms an infinitely high resistance for them and therefore does not absorb any energy. However, it forms a short circuit for the harmonics produced so that they do not reach the antenna. If this circle is calibrated for wavelengths, it can also serve as a wave meter.

Ein anderes Mittel zeigt Fig. 2, wobei dieselbe Röhrenschaltung zugrunde gelegt ist. In diesem Falle werden in die Antenne ein oder mehrere geschlossene Schwingungskreise S1, S2 eingeschaltet, die auf die am meisten hervortretenden Oberschwingungen einzeln abgestimmt sind und für diese einen unendlich hohen Widerstand darstellen, nicht aber für die Grundfrequenz. Die Oberschwingungen gelangen daher nicht zur Ausstrahlung.Another means is shown in FIG. 2, the same tube circuit being used as a basis. In this case, one or more closed oscillation circuits S 1 , S 2 are switched into the antenna, which are individually tuned to the most prominent harmonics and represent an infinitely high resistance for them, but not for the fundamental frequency. The harmonics are therefore not emitted.

Claims (2)

Patent- Ansprüche:Patent claims: 1. KathodenrÖhrengenerator- (Sender-) Schaltung, dadurch gekennzeichnet, daß zur Fernhaltung entstehender Oberschwingungen aus den Kreisen, in denen sie nicht erwünscht sind, auf die Hauptschwingung abgestimmte geschlossene Hilfskreise parallel oder auf die Oberwellen einzeln abgestimmte Hilfskreise in Serie zu jenen Kreisen oder zu den zu ihnen führenden Leitungsbahnen geschaltet sind.1. Cathode tube generator (transmitter) circuit, characterized in that to keep harmonic oscillations away from the circles in which they are not are desired on the main vibration Matched closed auxiliary circuits in parallel or individually matched to the harmonics Auxiliary circles in series to those circles or to those leading to them Conductor paths are switched. 2. Kathodenröhrenschaltung nach Anspruch i, dadurch gekennzeichnet, daß ein auf die Grundschwingung abgestimmter Schutzkreis auf Wellenlängen geeicht und dadurch als Wellenmesser benutzbar ist.2. cathode tube circuit according to claim i, characterized in that a Protective circle tuned to the fundamental vibration, calibrated to wavelengths and can therefore be used as a wave meter. Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
DENDAT304361D 1917-12-22 Active DE304361C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1621992X 1917-12-22

Publications (1)

Publication Number Publication Date
DE304361C true DE304361C (en)

Family

ID=7737419

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT304361D Active DE304361C (en) 1917-12-22

Country Status (3)

Country Link
US (1) US1621992A (en)
DE (1) DE304361C (en)
GB (1) GB147850A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE852560C (en) * 1948-11-13 1952-10-16 Siemens Ag Circuit arrangement for filtering out harmonics
DE973679C (en) * 1952-07-25 1960-04-28 Telefunken Gmbh Circuit arrangement for suppressing the emission of the harmonics of an oscillator of a VHF receiver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438382A (en) * 1945-05-05 1948-03-23 Rca Corp Oscillation generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE852560C (en) * 1948-11-13 1952-10-16 Siemens Ag Circuit arrangement for filtering out harmonics
DE973679C (en) * 1952-07-25 1960-04-28 Telefunken Gmbh Circuit arrangement for suppressing the emission of the harmonics of an oscillator of a VHF receiver

Also Published As

Publication number Publication date
US1621992A (en) 1927-03-22
GB147850A (en) 1921-09-08

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