FR2433856A1 - Magnetostrictive resonator for oscillators and narrow band filters - has rod longitudinally vibrated by magnetostriction with reduced parasitic coupling and operates in range 10khz to 100khz - Google Patents

Magnetostrictive resonator for oscillators and narrow band filters - has rod longitudinally vibrated by magnetostriction with reduced parasitic coupling and operates in range 10khz to 100khz

Info

Publication number
FR2433856A1
FR2433856A1 FR7823959A FR7823959A FR2433856A1 FR 2433856 A1 FR2433856 A1 FR 2433856A1 FR 7823959 A FR7823959 A FR 7823959A FR 7823959 A FR7823959 A FR 7823959A FR 2433856 A1 FR2433856 A1 FR 2433856A1
Authority
FR
France
Prior art keywords
coils
rod
parasitic coupling
oscillators
magnetostriction
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.)
Withdrawn
Application number
FR7823959A
Other languages
French (fr)
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 FR7823959A priority Critical patent/FR2433856A1/en
Publication of FR2433856A1 publication Critical patent/FR2433856A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/62—Filters comprising resonators of magnetostrictive material

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)

Abstract

The device is for use in oscillators and narrow band filters and comprises a rod (R) excited to oscillate in a longitudinal mode by two coils (E3, E4) coaxially mounted on the rod (R) on respective sides of its juncture with a thin leaf support (S1) located at a vibration node. Parasitic coupling between the coils (E3, E4) is reduced by intermediate short circuit rings. The range of operation of the device is 10KH2 to 100KH2. Polarisation of the coils (E3, E4) is effected by adjacent magnets or passage of current through the coils. In an oscillator, the coils are connected respectively to the input and output of an amplifier such that parasitic coupling is applied as negative feedback. In the presence of the magnets the rod is vibrated by the phenomenon of longitudinal magnetostriction with a stable frequency (S) at the amplifier output determined by the length and nature of the rod. Two amplifiers are used to provide a filter of bandwidth 1/600 of the frequency used.
FR7823959A 1978-08-17 1978-08-17 Magnetostrictive resonator for oscillators and narrow band filters - has rod longitudinally vibrated by magnetostriction with reduced parasitic coupling and operates in range 10khz to 100khz Withdrawn FR2433856A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7823959A FR2433856A1 (en) 1978-08-17 1978-08-17 Magnetostrictive resonator for oscillators and narrow band filters - has rod longitudinally vibrated by magnetostriction with reduced parasitic coupling and operates in range 10khz to 100khz

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7823959A FR2433856A1 (en) 1978-08-17 1978-08-17 Magnetostrictive resonator for oscillators and narrow band filters - has rod longitudinally vibrated by magnetostriction with reduced parasitic coupling and operates in range 10khz to 100khz

Publications (1)

Publication Number Publication Date
FR2433856A1 true FR2433856A1 (en) 1980-03-14

Family

ID=9211865

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7823959A Withdrawn FR2433856A1 (en) 1978-08-17 1978-08-17 Magnetostrictive resonator for oscillators and narrow band filters - has rod longitudinally vibrated by magnetostriction with reduced parasitic coupling and operates in range 10khz to 100khz

Country Status (1)

Country Link
FR (1) FR2433856A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2753529A (en) * 1955-07-28 1956-07-03 Rca Corp Electromechanical resonator
CH337963A (en) * 1954-12-03 1959-04-30 Standard Telephon & Radio Ag Device with electromechanical resonator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH337963A (en) * 1954-12-03 1959-04-30 Standard Telephon & Radio Ag Device with electromechanical resonator
US2753529A (en) * 1955-07-28 1956-07-03 Rca Corp Electromechanical resonator

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