FR2321802A1 - FILTER TAKING ADVANTAGE OF ACOUSTIC SURFACE WAVES - Google Patents

FILTER TAKING ADVANTAGE OF ACOUSTIC SURFACE WAVES

Info

Publication number
FR2321802A1
FR2321802A1 FR7625074A FR7625074A FR2321802A1 FR 2321802 A1 FR2321802 A1 FR 2321802A1 FR 7625074 A FR7625074 A FR 7625074A FR 7625074 A FR7625074 A FR 7625074A FR 2321802 A1 FR2321802 A1 FR 2321802A1
Authority
FR
France
Prior art keywords
taking advantage
surface waves
acoustic surface
filter taking
filter
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
FR7625074A
Other languages
French (fr)
Other versions
FR2321802B1 (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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken 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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2321802A1 publication Critical patent/FR2321802A1/en
Application granted granted Critical
Publication of FR2321802B1 publication Critical patent/FR2321802B1/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
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02858—Means for compensation or elimination of undesirable effects of wave front distortion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14517—Means for weighting
    • H03H9/1452—Means for weighting by finger overlap length, apodisation

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
FR7625074A 1975-08-18 1976-08-18 FILTER TAKING ADVANTAGE OF ACOUSTIC SURFACE WAVES Granted FR2321802A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3423475A GB1512686A (en) 1975-08-18 1975-08-18 Acoustic surface wave devices

Publications (2)

Publication Number Publication Date
FR2321802A1 true FR2321802A1 (en) 1977-03-18
FR2321802B1 FR2321802B1 (en) 1982-03-12

Family

ID=10363100

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7625074A Granted FR2321802A1 (en) 1975-08-18 1976-08-18 FILTER TAKING ADVANTAGE OF ACOUSTIC SURFACE WAVES

Country Status (5)

Country Link
JP (1) JPS5224444A (en)
CA (1) CA1089083A (en)
DE (1) DE2635192C2 (en)
FR (1) FR2321802A1 (en)
GB (1) GB1512686A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2412984A1 (en) * 1977-12-21 1979-07-20 Tektronix Inc Acoustic surface wave device - has converter with overlapping sections and has two collector conductors with sections oblique to propagation direction

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1585087A (en) * 1976-07-29 1981-02-25 Plessey Co Ltd Surface acoustic wave filters
US4205285A (en) * 1978-11-03 1980-05-27 Gte Laboratories Incorporated Acoustic surface wave device
JPS5654114A (en) * 1979-10-11 1981-05-14 Nec Corp Reed screen shape converter of elastic surface wave
CN114611533B (en) * 2022-01-28 2022-12-06 金陵科技学院 Interdigital unilateral inclined weighted surface acoustic wave type Morlet wavelet processor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2133821A1 (en) * 1971-04-17 1972-12-01 Marconi Co Ltd
FR2281005A1 (en) * 1974-08-02 1976-02-27 Philips Nv FILTER TAKING ADVANTAGE OF ACOUSTIC SURFACE WAVES
DE2542854A1 (en) * 1974-09-26 1976-04-15 Plessey Handel Investment Ag ACOUSTIC SURFACE WAVE FILTER

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2133821A1 (en) * 1971-04-17 1972-12-01 Marconi Co Ltd
FR2281005A1 (en) * 1974-08-02 1976-02-27 Philips Nv FILTER TAKING ADVANTAGE OF ACOUSTIC SURFACE WAVES
DE2542854A1 (en) * 1974-09-26 1976-04-15 Plessey Handel Investment Ag ACOUSTIC SURFACE WAVE FILTER

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2412984A1 (en) * 1977-12-21 1979-07-20 Tektronix Inc Acoustic surface wave device - has converter with overlapping sections and has two collector conductors with sections oblique to propagation direction

Also Published As

Publication number Publication date
JPS5753003B2 (en) 1982-11-10
DE2635192C2 (en) 1985-08-08
FR2321802B1 (en) 1982-03-12
CA1089083A (en) 1980-11-04
JPS5224444A (en) 1977-02-23
DE2635192A1 (en) 1977-03-03
GB1512686A (en) 1978-06-01

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Legal Events

Date Code Title Description
ST Notification of lapse