AT212380B - Band stretch circuit - Google Patents
Band stretch circuitInfo
- 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
Links
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Description
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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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Band stretch circuit
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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)
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) |
-
1958
- 1958-06-28 AT AT457758A patent/AT212380B/en active
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