FR2235532A1 - Adjustable frequency piezo-electric filter - material resonance is obtained by exciting through range of impedance modes - Google Patents

Adjustable frequency piezo-electric filter - material resonance is obtained by exciting through range of impedance modes

Info

Publication number
FR2235532A1
FR2235532A1 FR7324074A FR7324074A FR2235532A1 FR 2235532 A1 FR2235532 A1 FR 2235532A1 FR 7324074 A FR7324074 A FR 7324074A FR 7324074 A FR7324074 A FR 7324074A FR 2235532 A1 FR2235532 A1 FR 2235532A1
Authority
FR
France
Prior art keywords
electrodes
range
exciting
adjustable frequency
resonance
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.)
Granted
Application number
FR7324074A
Other languages
French (fr)
Other versions
FR2235532B1 (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.)
BRUNOT MICHEL FR
Original Assignee
BRUNOT MICHEL FR
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 BRUNOT MICHEL FR filed Critical BRUNOT MICHEL FR
Priority to FR7324074A priority Critical patent/FR2235532A1/en
Publication of FR2235532A1 publication Critical patent/FR2235532A1/en
Application granted granted Critical
Publication of FR2235532B1 publication Critical patent/FR2235532B1/fr
Granted 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
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/58—Multiple crystal filters
    • H03H9/60—Electric coupling means therefor
    • 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
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/56—Monolithic crystal filters
    • H03H9/566—Electric coupling means therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

Resonance over a range of frequencies is dependent on the state of impedance or admittance of the parallelpiped shaped piezo-electric block, frequency of operation rising through the low inductance to short circuit, to capacitative, to open circuit, to high inductive states. Four electrodes are utilised, the practical shape of which would be in the form of a disc having, on one face, centre and annular electrodes and a single disc electrode on the other face. The electrodes (2) and (3) provide excitation of the quartz, lithium niobate or tantalate, and electrodes (4) and (5) the resonance regulation by means of reactance variation.
FR7324074A 1973-06-29 1973-06-29 Adjustable frequency piezo-electric filter - material resonance is obtained by exciting through range of impedance modes Granted FR2235532A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7324074A FR2235532A1 (en) 1973-06-29 1973-06-29 Adjustable frequency piezo-electric filter - material resonance is obtained by exciting through range of impedance modes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7324074A FR2235532A1 (en) 1973-06-29 1973-06-29 Adjustable frequency piezo-electric filter - material resonance is obtained by exciting through range of impedance modes

Publications (2)

Publication Number Publication Date
FR2235532A1 true FR2235532A1 (en) 1975-01-24
FR2235532B1 FR2235532B1 (en) 1979-01-26

Family

ID=9121839

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7324074A Granted FR2235532A1 (en) 1973-06-29 1973-06-29 Adjustable frequency piezo-electric filter - material resonance is obtained by exciting through range of impedance modes

Country Status (1)

Country Link
FR (1) FR2235532A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083237A2 (en) * 1981-12-29 1983-07-06 Fujitsu Limited Ceramic resonator, and ceramic filter using the ceramic resonator
EP0088548A2 (en) * 1982-02-22 1983-09-14 Fujitsu Limited Piezoelectric resonators
FR2625854A1 (en) * 1988-01-07 1989-07-13 Korbashov Jury PIEZOELECTRIC CERAMIC RESONATOR WITH CONTROLLED RESONANCE FREQUENCY
WO2004093315A1 (en) * 2003-04-17 2004-10-28 Koninklijke Philips Electronics N.V. Method of, and circuit for, broadening the frequency band of frequency dependent loads
EP3496273A1 (en) * 2017-12-07 2019-06-12 Infineon Technologies AG Tunable acoustic resonator element, filter circuit and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3047823A (en) * 1959-05-07 1962-07-31 Panoramic Radio Products Inc Tunable piezo-electric crystal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3047823A (en) * 1959-05-07 1962-07-31 Panoramic Radio Products Inc Tunable piezo-electric crystal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
UE US IEE SPECTRUM , VOL. 7, NO 8, AOUT 1970 ARTICLE DE G.S. MOSCHYTZ : INTRODUCTORLESS FILTERS : A SURVEY : I. ELECTROMECHANICAL FILTERS", PAGES 30-36 *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0083237A2 (en) * 1981-12-29 1983-07-06 Fujitsu Limited Ceramic resonator, and ceramic filter using the ceramic resonator
EP0083237A3 (en) * 1981-12-29 1985-04-24 Fujitsu Limited Ceramic resonator, and ceramic filter using the ceramic resonator
EP0088548A2 (en) * 1982-02-22 1983-09-14 Fujitsu Limited Piezoelectric resonators
EP0088548A3 (en) * 1982-02-22 1985-07-31 Fujitsu Limited Piezoelectric resonators
FR2625854A1 (en) * 1988-01-07 1989-07-13 Korbashov Jury PIEZOELECTRIC CERAMIC RESONATOR WITH CONTROLLED RESONANCE FREQUENCY
WO2004093315A1 (en) * 2003-04-17 2004-10-28 Koninklijke Philips Electronics N.V. Method of, and circuit for, broadening the frequency band of frequency dependent loads
US10840887B2 (en) 2017-12-07 2020-11-17 Infineon Technologies Ag System and method for a radio frequency filter
EP3506499A3 (en) * 2017-12-07 2019-10-09 Infineon Technologies AG Tunable resonator element, filter circuit and method
EP3496273A1 (en) * 2017-12-07 2019-06-12 Infineon Technologies AG Tunable acoustic resonator element, filter circuit and method
US10931262B2 (en) 2017-12-07 2021-02-23 Infineon Technologies Ag Tunable resonator element, filter circuit and method
US10965274B2 (en) 2017-12-07 2021-03-30 Infineon Technologies Ag System and method for a radio frequency filter
US10979021B2 (en) 2017-12-07 2021-04-13 Infineon Technologies Ag System and method for a radio frequency filter
US11005451B2 (en) 2017-12-07 2021-05-11 Infineon Technologies Ag Acoustically coupled resonator notch and bandpass filters
US11005449B2 (en) 2017-12-07 2021-05-11 Infineon Technologies Ag Acoustically coupled resonator notch and bandpass filters
US11012051B2 (en) 2017-12-07 2021-05-18 Infineon Technologies Ag System and method for a radio frequency filter
US11018652B2 (en) 2017-12-07 2021-05-25 Infineon Technologies Ag Tunable resonator element, filter circuit and method
US11057018B2 (en) 2017-12-07 2021-07-06 Infineon Technologies Ag Acoustically coupled resonator notch and bandpass filters
US11245381B2 (en) 2017-12-07 2022-02-08 Infineon Technologies Ag System and method for a radio frequency filter

Also Published As

Publication number Publication date
FR2235532B1 (en) 1979-01-26

Similar Documents

Publication Publication Date Title
GB1058198A (en) Electric wave filters
FR2477803B1 (en)
GB956837A (en) Improvements in or relating to mechanical filters for low-frequencies
JPS5323589A (en) Crystal vibrator
JPS5252597A (en) Bend type piezoelectric vibrator
FR2235532A1 (en) Adjustable frequency piezo-electric filter - material resonance is obtained by exciting through range of impedance modes
GB1276766A (en) Arrangement for ultrasonic generators
ES354924A1 (en) Low temperature-frequency coefficient lithium tantalate cuts and devices utilizing same
ES366488A1 (en) Crystal filters
Budreau et al. Frequency synthesizer using acoustic surface-wave filters
GB587399A (en) Improvements in crystal oscillation circuits
JPS5636216A (en) Composite piezo-vibrator
SU502482A1 (en) Electromechanical filter on surface acoustic waves
JPS52142948A (en) Piezoelectric ceramic filter
JPS51126785A (en) Frequency-adjusting method of thickness-shear-crystal vibration use cr ystal piece
JPS51118981A (en) Frequency regulator of bending piez/-electric oscillator
JPS5264857A (en) Voltage control quartz crystal oscillator
SU1109883A1 (en) Crystal filter
JPS5332690A (en) Tuning fork type piezoelectric vibrator
RU4874U1 (en) FREQUENCY-MODULATED QUARTZ GENERATOR
JPS5333667A (en) Time regulating element for electronic watches
JPS6453607A (en) Magnetostatic wave delaying line type oscillator
JPS5726905A (en) Fm demodulation circuit
SU506013A1 (en) A device for powering a stable voltage with a higher frequency load that is remote to a considerable distance from the frequency converter
JPS5552623A (en) Piezo-vibrator

Legal Events

Date Code Title Description
ST Notification of lapse