CH231616A - Device in which a simultaneous tuning of oscillation circuits, the resonance frequencies of which must differ by a constant amount, takes place by means of the same and adjustable means. - Google Patents

Device in which a simultaneous tuning of oscillation circuits, the resonance frequencies of which must differ by a constant amount, takes place by means of the same and adjustable means.

Info

Publication number
CH231616A
CH231616A CH231616DA CH231616A CH 231616 A CH231616 A CH 231616A CH 231616D A CH231616D A CH 231616DA CH 231616 A CH231616 A CH 231616A
Authority
CH
Switzerland
Prior art keywords
differ
takes place
same
resonance frequencies
constant amount
Prior art date
Application number
Other languages
German (de)
Inventor
Gloeilampenfabrieken N Philips
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of CH231616A publication Critical patent/CH231616A/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00—Variable inductances or transformers of the signal type
    • H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
    • H01F21/06—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by movement of core or part of core relative to the windings as a whole
    • H01F21/065—Measures for obtaining a desired relation between the position of the core and the inductance
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/18—Modifications of frequency-changers for eliminating image frequencies
    • 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

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
CH231616D 1940-10-16 1942-02-17 Device in which a simultaneous tuning of oscillation circuits, the resonance frequencies of which must differ by a constant amount, takes place by means of the same and adjustable means. CH231616A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL231616X 1940-10-16

Publications (1)

Publication Number Publication Date
CH231616A true CH231616A (en) 1944-03-31

Family

ID=19779997

Family Applications (1)

Application Number Title Priority Date Filing Date
CH231616D CH231616A (en) 1940-10-16 1942-02-17 Device in which a simultaneous tuning of oscillation circuits, the resonance frequencies of which must differ by a constant amount, takes place by means of the same and adjustable means.

Country Status (6)

Country Link
US (1) US2363101A (en)
BE (1) BE450074A (en)
CH (1) CH231616A (en)
FR (1) FR894036A (en)
GB (1) GB605807A (en)
NL (2) NL99230B (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899654A (en) * 1959-08-11 Variable inductance device
US2474761A (en) * 1942-07-15 1949-06-28 Hartford Nat Bank & Trust Co Coil having a slidable core and method of establishing the ratio between the maximumand minimum inductance thereof
US3052860A (en) * 1945-09-17 1962-09-04 Iii Francis M Walters Radio frequency choke
US2505791A (en) * 1946-02-27 1950-05-02 Zenith Radio Corp Inductance tuning apparatus
US2477749A (en) * 1946-04-04 1949-08-02 Aladdin Ind Inc Inductor tuning system
US2528167A (en) * 1948-03-23 1950-10-31 Rca Corp Band-spread tuning inductance device
US2496058A (en) * 1948-05-22 1950-01-31 Rca Corp Permeability tuner
US2621324A (en) * 1948-07-21 1952-12-09 Rca Corp Permeability tuned variable inductance
US2565261A (en) * 1948-09-11 1951-08-21 Rca Corp Permeability tuning system for superheterodyne receiver
US2533810A (en) * 1949-08-13 1950-12-12 Aladdin Ind Inc Wide band calibrated tuner and inductor for use therewith
US2645718A (en) * 1950-06-06 1953-07-14 Rca Corp Variable inductance structure
US2750495A (en) * 1951-11-20 1956-06-12 Motorola Inc Receiver which tunes by adjusting magnetic core antenna
US2979655A (en) * 1957-09-19 1961-04-11 Magnaflux Corp Method and apparatus for detecting flaws
US3017589A (en) * 1958-05-13 1962-01-16 Int Resistance Co Differential transformer
DE3618953A1 (en) * 1986-06-05 1987-12-10 Electronic Werke Deutschland AMPLITUDE COIL FOR THE LINE STAGE OF A TELEVISION RECEIVER

Also Published As

Publication number Publication date
US2363101A (en) 1944-11-21
NL99230B (en)
NL56233C (en)
BE450074A (en)
FR894036A (en) 1944-12-12
GB605807A (en) 1948-07-30

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