FR1044665A - Circuit oscillant modulé par la fréquence - Google Patents

Circuit oscillant modulé par la fréquence

Info

Publication number
FR1044665A
FR1044665A FR1044665DA FR1044665A FR 1044665 A FR1044665 A FR 1044665A FR 1044665D A FR1044665D A FR 1044665DA FR 1044665 A FR1044665 A FR 1044665A
Authority
FR
France
Prior art keywords
oscillating circuit
frequency modulated
modulated oscillating
frequency
circuit
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
Other languages
English (en)
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.)
VELGA ETS
Original Assignee
VELGA ETS
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 VELGA ETS filed Critical VELGA ETS
Application granted granted Critical
Publication of FR1044665A publication Critical patent/FR1044665A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/04—Microphones
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C3/00—Angle modulation
    • H03C3/10—Angle modulation by means of variable impedance
    • H03C3/28—Angle modulation by means of variable impedance using variable impedance driven mechanically or acoustically

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
FR1044665D 1950-04-22 1951-04-20 Circuit oscillant modulé par la fréquence Expired FR1044665A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH704473X 1950-04-22

Publications (1)

Publication Number Publication Date
FR1044665A true FR1044665A (fr) 1953-11-19

Family

ID=4530281

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1044665D Expired FR1044665A (fr) 1950-04-22 1951-04-20 Circuit oscillant modulé par la fréquence

Country Status (6)

Country Link
US (1) US2683861A (fr)
CH (1) CH291952A (fr)
DE (1) DE865324C (fr)
FR (1) FR1044665A (fr)
GB (1) GB704473A (fr)
NL (1) NL160670B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3061675A (en) * 1958-09-09 1962-10-30 Texas Instruments Inc Loud speaker improvement
US3057961A (en) * 1959-01-08 1962-10-09 Security First Nat Bank Self-correcting, high fidelity, sound reproducing apparatus
US3135920A (en) * 1959-10-12 1964-06-02 Rca Corp Frequency controlled oscillator
US3311703A (en) * 1963-05-21 1967-03-28 Carl E Grinstead Microphone with low frequency filter
DE1190042B (de) * 1963-08-01 1965-04-01 Peter Krehl Kondensator-Mikrophon in Hochfrequenzschaltung
DE1240128B (de) * 1964-08-01 1967-05-11 Sennheiser Electronic Hochfrequenzkondensatormikrophon mit einem Oszillator und einem angekoppelten, auf dessen Frequenz abgestimmten Schwingkreis, dessen Kapazitaet das Wandlerelement bildet
US3440348A (en) * 1965-06-26 1969-04-22 Shell Oil Co Multivibrator capacitor microphone circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1622039A (en) * 1925-05-02 1927-03-22 Frederick W Lee Apparatus for and method of reproducing sound
US1631583A (en) * 1926-02-12 1927-06-07 Ignatz Lauter Capacitatively-actuated loud speaker
US2008713A (en) * 1931-05-27 1935-07-23 Harvey C Hayes Sound detecting apparatus
US2311491A (en) * 1941-07-31 1943-02-16 Rca Corp Radio-acoustic apparatus
US2386049A (en) * 1943-03-09 1945-10-02 Gen Electric Apparatus for converting sound to frequency modulated currents

Also Published As

Publication number Publication date
CH291952A (de) 1953-07-15
NL160670B (nl)
DE865324C (de) 1953-02-02
US2683861A (en) 1954-07-13
GB704473A (en) 1954-02-24

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