DE854057C - Overlay receiver with one-button operation and means for maintaining a constant frequency difference between the input and oscillator circuit - Google Patents

Overlay receiver with one-button operation and means for maintaining a constant frequency difference between the input and oscillator circuit

Info

Publication number
DE854057C
DE854057C DEP50139A DEP0050139A DE854057C DE 854057 C DE854057 C DE 854057C DE P50139 A DEP50139 A DE P50139A DE P0050139 A DEP0050139 A DE P0050139A DE 854057 C DE854057 C DE 854057C
Authority
DE
Germany
Prior art keywords
oscillator circuit
input
maintaining
button operation
frequency difference
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
Application number
DEP50139A
Other languages
German (de)
Inventor
Albert Lindscheid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DEP50139A priority Critical patent/DE854057C/en
Application granted granted Critical
Publication of DE854057C publication Critical patent/DE854057C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J3/00—Continuous tuning
    • H03J3/28—Continuous tuning of more than one resonant circuit simultaneously, the tuning frequencies of the circuits having a substantially constant difference throughout the tuning range

Landscapes

  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Transmission Devices (AREA)

Description

Bei fast-allen bisher bekannten Superschaltungen erfolgt der Gleichlauf durch elektrische Korrekturen in Form von festen Reihenkondensatoren hauptsächlich im Oszillatorkreis. Ausgehend davon, daß diesen bekannten Superschaltungen ein Parallellauffehler anhaftet, der selbst bei guten Konstruktionen ± q kHz beträgt (vgl. Fig. i), wird vorgeschlagen, durch eine Kombination der beiden bekannten Abstimmarten (Kondensator- und Permeabilitätsabstimmung) den Gleichlauffehler vollständig zu beseitigen, und zwar wie folgt: Zur Erzielung eines richtigen Gleichlaufes zwischen Eingangs- und Oszillatorkreis ist es erforderlich, daß der Frequenzabstand des Eingangs- und Oszillatorkreises um den Betrag der Zwischenfrequenz in jedem Moment erhalten bleibt. Bei der erfindungsgemäßen Anordnung wird der Eingangskreis durch einen Drehkondensator und der Oszillatorkreis, durch Verschieben des Eisenkernes abgestimmt (Fig. a). Den Eingangskreis kann man nun durch Einstellen des Drehkondensators um einen Drehwinkel a, auf eine bestimmte Frequenz fel abstimmen. Der Oszillatorkreis kann durch Verschieben des Eisenkernes um einen bestimmten Betrag nimm auf den Wert Eingangs- -f- Zwischenfrequenz = Oszillatorfrequenz fol abgestimmt werden. Verändert man den Drehkondensator des Eingangkreises um den Drehwinkel a", so ist der Eingangskreis auf die Frequenz f"2 abgestimmt, und man muß den Eisenkern des Oszillatorkreises um n. mm verschieben, um die Oszillatorfrequenz fo2=Eingangsfrequenz fez + Zwischenfrequenz zu erreichen.Almost all previously known supercircuits are synchronized mainly through electrical corrections in the form of fixed series capacitors in the oscillator circuit. Assuming that these known supercircuits are a parallel error adheres, which is ± q kHz even with good constructions (cf. Fig. i) suggested using a combination of the two known types of tuning (capacitor and permeability tuning) to completely eliminate the synchronization error, and as follows: To achieve correct synchronization between input and Oscillator circuit, it is necessary that the frequency spacing of the input and oscillator circuit by the amount of the intermediate frequency is maintained at every moment. In the inventive Arrangement, the input circuit is made up of a variable capacitor and the oscillator circuit, matched by moving the iron core (Fig. a). You can use the input circle now by setting the rotary capacitor by a rotation angle α to a specific one Tune frequency fel. The oscillator circuit can be adjusted by moving the iron core by a certain amount take the value input- -f- intermediate frequency = oscillator frequency fol be voted on. If you change the variable capacitor of the input circuit by the Angle of rotation a ", the input circuit is tuned to the frequency f" 2, and man must move the iron core of the oscillator circuit by n. mm, by the oscillator frequency fo2 = input frequency fez + intermediate frequency to be achieved.

Die Bedienung der beiden Kreise, also die Drehwinkeländerung (Kapazitätsänderung des Eingangskreises) und die Verschiebung des Eisenkernes (Induktivitätsänderung des Oszillatorkreises), soll durch einen Griff erfolgen (Einknopfbedienung). Damit ist gesagt, daß die Kreise mechanisch gekuppelt werden müssen, und zwar durch eine Kurvenscheibe auf der Drehkondensatorachse (s. Fig.3), so daß gleichzeitig mit der Drehwinkeländerung des Drehkondensators eine entsprechende Verschiebung des Eisenkernes erfolgt. Durch eine richtige Formgebung der Kurvenscheibe läßt es sich erreichen, daß zu jeder Drehwinkeländerung die Verschiebung des Eisenkernes so erfolgt, daß der Frequenzabstand in jedem Moment gleich der Zwischenfrequenz ist und somit ein iooo/oiger Gleichlauf erreicht wird.The operation of the two circles, i.e. the change in the angle of rotation (change in capacitance of the input circuit) and the displacement of the iron core (change in inductance of the oscillator circuit), should be done by a handle (one-button operation). In order to it is said that the circles must be coupled mechanically, by means of a Cam on the rotary capacitor axis (see Fig. 3), so that simultaneously with the Change in the angle of rotation of the rotary capacitor causes a corresponding shift in the iron core he follows. Correct shaping of the cam disc makes it possible to that for every change in the angle of rotation the shifting of the iron core takes place in such a way that the frequency spacing is equal to the intermediate frequency at every moment and thus a 100% synchronism is achieved.

Bei Verwendung eines 36o°-Drehkondensators läßt sich durch einen automatischen Umschalter zwischen i8o bis igo° und unter Ausnutzung der zweiten Hälfte der Kurvenscheibe das Langwellenband bestreichen.When using a 36o ° rotating capacitor, an automatic Toggle switch between i8o to igo ° and using the second half of the cam coat the long wave tape.

Claims (1)

PATENTANSPRUCH: Überlagerungsempfänger mit Einknopfbedienung und Mitteln zur Einhaltung einer konstanten Frequenzdifferenz zwischen Eingangskreis und Oszillatorkreis, dadurch gekennzeichnet, daß im Eingangskreis mittels Drehkondensators und im Oszillatorkreis mit Hilfe einer veränderbaren Induktivität abgestimmt wird und daß als mechanisches Kopplungsmittel zwischen den Antrieben beider Abstimmittel eine Kurvenscheibe vorgesehen ist, deren Formgebung entsprechend gewählt ist. Angezogene Druckschriften: USA.-Patentschrift Nr. i 577 613; französische Patentschrift Nr. 9oo 89z. PATENT CLAIM: Overlay receiver with one-button operation and means for maintaining a constant frequency difference between the input circuit and the oscillator circuit, characterized in that tuning is carried out in the input circuit by means of a variable capacitor and in the oscillator circuit with the aid of a variable inductance and that a cam is provided as a mechanical coupling means between the drives of both tuning means, whose shape is chosen accordingly. Cited references: U.S. Patent No. 1,577,613; French Patent No. 9oo 89z.
DEP50139A 1949-07-27 1949-07-27 Overlay receiver with one-button operation and means for maintaining a constant frequency difference between the input and oscillator circuit Expired DE854057C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP50139A DE854057C (en) 1949-07-27 1949-07-27 Overlay receiver with one-button operation and means for maintaining a constant frequency difference between the input and oscillator circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP50139A DE854057C (en) 1949-07-27 1949-07-27 Overlay receiver with one-button operation and means for maintaining a constant frequency difference between the input and oscillator circuit

Publications (1)

Publication Number Publication Date
DE854057C true DE854057C (en) 1952-10-30

Family

ID=7384206

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP50139A Expired DE854057C (en) 1949-07-27 1949-07-27 Overlay receiver with one-button operation and means for maintaining a constant frequency difference between the input and oscillator circuit

Country Status (1)

Country Link
DE (1) DE854057C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1223897B (en) * 1962-07-20 1966-09-01 Arthur Klemt Overlay receiver

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1577613A (en) * 1925-02-04 1926-03-23 Francis W Dunmore Radio receiving apparatus
FR900892A (en) * 1943-12-30 1945-07-11 Controle Soc Et Further development of tuning devices for frequency changing radio receivers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1577613A (en) * 1925-02-04 1926-03-23 Francis W Dunmore Radio receiving apparatus
FR900892A (en) * 1943-12-30 1945-07-11 Controle Soc Et Further development of tuning devices for frequency changing radio receivers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1223897B (en) * 1962-07-20 1966-09-01 Arthur Klemt Overlay receiver

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