AT212380B - Band stretch circuit - Google Patents

Band stretch circuit

Info

Publication number
AT212380B
AT212380B AT457758A AT457758A AT212380B AT 212380 B AT212380 B AT 212380B AT 457758 A AT457758 A AT 457758A AT 457758 A AT457758 A AT 457758A AT 212380 B AT212380 B AT 212380B
Authority
AT
Austria
Prior art keywords
circuit
stretch circuit
band stretch
band
induction
Prior art date
Application number
AT457758A
Other languages
German (de)
Original Assignee
Minerva Radio W Wohleber & Co
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 Minerva Radio W Wohleber & Co filed Critical Minerva Radio W Wohleber & Co
Priority to AT457758A priority Critical patent/AT212380B/en
Application granted granted Critical
Publication of AT212380B publication Critical patent/AT212380B/en

Links

Landscapes

  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



    Banddehnungs Schaltung    
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 sator, nur an einen Teil der Selbstinduktion gelegt wird. Das ergibt eine ausserordentliche Vereinfachung der Schaltung, sowohl in bezug auf die benötigten Schaltelemente, wie auch in bezug auf die Anzahl der Schaltkontakte, Wie die Schaltung im einzelnen auszuführen ist, wird im folgenden beispielsweise dargelegt. 



   Fig. 1 zeigt die Schaltung eines Schwingkreises, wobei   z. B.   mit diesem das 16 m Band bestrichen werden soll. In dieser Fig. 1 ist L die Spule, welche eine Anzapfung bei beispielsweise 2 Windungen besitzt, An diesem Anzapfungspunkt liegt über   einem Verkürzungs-Kondensator Cs   der Drehkondensator   Cy,   mit welchem die Abstimmung erfolgt. Parallel zur Spule L liegt noch ein Kondensator Cp, der den Beginn des Kurzwellenbandes bestimmt, während das Ende des Kurzwellenbandes durch die Grösse der Selbstinduktion L festgelegt ist.

   Es ist klar ersichtlich, dass der durch Cs verkürzte Drehkondensator   Cv. der im   übrigen nur mit einem kleinen Teil (2 Windungen) der vorhandenen SelbstinduktionL parallel geschaltet ist, beim Durchdrehen nur geringen Einfluss auf die Resonanzfrequenz des Schwingkreises haben wird. Er soll auch nur die Resonanzfrequenz des Schwingkreises soweit verschieben, als dies für den Empfang 
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   <Desc / Clms Page number 1>
 



    Band stretch circuit
 EMI1.1
 

 <Desc / Clms Page number 2>

 sator, is only applied to part of the self-induction. This results in an extraordinary simplification of the circuit, both in terms of the required switching elements and in terms of the number of switching contacts. How the circuit is to be implemented in detail is set out below, for example.



   Fig. 1 shows the circuit of a resonant circuit, with z. B. with this the 16 m tape is to be coated. In this FIG. 1, L is the coil, which has a tap with, for example, 2 turns. At this tap point, via a shortening capacitor Cs, the variable capacitor Cy, with which the tuning takes place. Parallel to the coil L there is also a capacitor Cp which determines the beginning of the shortwave band, while the end of the shortwave band is determined by the magnitude of the self-induction L.

   It can be clearly seen that the variable capacitor Cv, shortened by Cs. which is connected in parallel with only a small part (2 turns) of the existing self-induction L, will only have a small influence on the resonance frequency of the oscillating circuit when it is spinning. It should also only shift the resonance frequency of the oscillating circuit as far as this is necessary for reception
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Claims (1)

<Desc/Clms Page number 3> Mittel nur einem Teil der Selbstinduktion des Schwingungskreises bzw. nur einem Teil der Kapaziraa des Schwingungskreises parallel geschaltet ist. <Desc / Clms Page number 3> Means only part of the self-induction of the oscillation circuit or only part of the capacitance of the oscillation circuit is connected in parallel.
AT457758A 1958-06-28 1958-06-28 Band stretch circuit AT212380B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT457758A AT212380B (en) 1958-06-28 1958-06-28 Band stretch circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT457758A AT212380B (en) 1958-06-28 1958-06-28 Band stretch circuit

Publications (1)

Publication Number Publication Date
AT212380B true AT212380B (en) 1960-12-12

Family

ID=3565727

Family Applications (1)

Application Number Title Priority Date Filing Date
AT457758A AT212380B (en) 1958-06-28 1958-06-28 Band stretch circuit

Country Status (1)

Country Link
AT (1) AT212380B (en)

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