BE493901A - - Google Patents

Info

Publication number
BE493901A
BE493901A BE493901DA BE493901A BE 493901 A BE493901 A BE 493901A BE 493901D A BE493901D A BE 493901DA BE 493901 A BE493901 A BE 493901A
Authority
BE
Belgium
Application number
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 BE493901A publication Critical patent/BE493901A/xx
Priority claimed from US235286A external-priority patent/US2737580A/en

Links

Classifications

    • 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
    • H03D7/06—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes
    • H03D7/08—Transference of modulation from one carrier to another, e.g. frequency-changing by means of discharge tubes having more than two electrodes the signals to be mixed being applied between the same two electrodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof
    • H03H7/0161—Bandpass filters
    • 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)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Circuits Of Receivers In General (AREA)
  • Superheterodyne Receivers (AREA)
BE493901D 1949-02-16 BE493901A (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL279489X 1949-02-16
NL2737580X 1950-07-08
US235286A US2737580A (en) 1949-02-16 1951-07-05 Mixing circuit for superheterodyne receivers
US554600A US2816222A (en) 1949-02-16 1955-12-01 Mixing circuit for superheterodyne receivers

Publications (1)

Publication Number Publication Date
BE493901A true BE493901A (fr)

Family

ID=32329976

Family Applications (2)

Application Number Title Priority Date Filing Date
BE504519D BE504519A (fr) 1949-02-16
BE493901D BE493901A (fr) 1949-02-16

Family Applications Before (1)

Application Number Title Priority Date Filing Date
BE504519D BE504519A (fr) 1949-02-16

Country Status (7)

Country Link
US (2) US2662171A (fr)
BE (2) BE493901A (fr)
CH (2) CH279489A (fr)
DE (2) DE914397C (fr)
FR (2) FR1015619A (fr)
GB (2) GB668238A (fr)
NL (5) NL88017C (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL89165C (fr) * 1949-02-16
US2737580A (en) * 1949-02-16 1956-03-06 Hartford Nat Bank & Trust Co Mixing circuit for superheterodyne receivers
NL189202B (nl) * 1954-07-14 Air Prod & Chem Werkwijze voor het bereiden van een polyurethaanschuim; trimethylhydroxyalkyl alkyleendiamine.
US2933599A (en) * 1955-04-05 1960-04-19 Hazeltine Research Inc Non-radiating autodyne frequency converter
DE1016775B (de) * 1956-05-18 1957-10-03 Telefunken Gmbh Selbstschwingende Mischstufe mit Triode fuer hohe Frequenzen, z.B. in Fernsehempfaengern mit Kanalschalter
US2950383A (en) * 1957-08-22 1960-08-23 Rca Corp Frequency converter with oscillator tuning inductor
US3018372A (en) * 1958-02-17 1962-01-23 Sarkes Tarzian High frequency tuner
US3207990A (en) * 1961-08-10 1965-09-21 Standard Kollsman Ind Inc Unilaterally-transmissive frequency-selective triode converter

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE369710C (de) * 1918-07-18 1923-02-22 Erich F Huth G M B H Dr Einrichtung zur Erzeugung und Verstaerkung von Schwingungen beliebiger Frequenz, insbesondere fuer drahtlose Telegraphie
FR628518A (fr) * 1927-01-15 1927-10-25 Procédé de changement de fréquence pour radiosignalisation et dispositif pour la réalisation de ce procédé
NL25668C (fr) * 1927-03-25
FR673718A (fr) * 1928-08-25 1930-01-18 Radiomodulation par les lampes à faible capacité intérieure
GB327710A (en) * 1929-01-09 1930-04-09 Gramophone Co Ltd Improvements in or relating to tuning devices for wireless receivers
US1818157A (en) * 1929-04-17 1931-08-11 Maurice M Phillips Radio receiving circuits
US1895091A (en) * 1930-08-19 1933-01-24 Hazeltine Corp Electric coupling circuit
US1957446A (en) * 1931-02-13 1934-05-08 Jennings B Dow Oscillator system
DE739095C (de) * 1932-04-16 1944-01-19 Opta Radio Ag Mischroehrenschaltung fuer UEberlagerungsempfaenger
US2058430A (en) * 1932-04-27 1936-10-27 Harold F Elliott Modulator and demodulator
US1927189A (en) * 1932-10-20 1933-09-19 Martin L Sory Automobile highway safety wall
US2010253A (en) * 1933-12-29 1935-08-06 Rca Corp Amplifier
US2051177A (en) * 1935-02-13 1936-08-18 Radio Patents Corp Electron coupled circuit
US2156809A (en) * 1937-03-04 1939-05-02 Stanley T Fredrickson Radio receiving system
US2231389A (en) * 1939-05-08 1941-02-11 Philips Nv Tunable oscillatory circuits
NL89165C (fr) * 1949-02-16

Also Published As

Publication number Publication date
DE914397C (de) 1954-07-01
US2816222A (en) 1957-12-10
FR61832E (fr) 1955-05-18
GB668238A (en) 1952-03-12
CH279489A (de) 1951-11-30
CH294959A (de) 1953-11-30
BE504519A (fr)
NL89165C (fr)
NL147897B (nl)
US2662171A (en) 1953-12-08
DE1011478B (de) 1957-07-04
FR1015619A (fr) 1952-10-16
NL144909B (nl)
NL88017C (fr)
NL83683C (fr)
GB683939A (en) 1952-12-10

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