PT91838A - Transdutor com variacao da sobreposicao dos dedos para filtros de ondas acusticas de superficie - Google Patents

Transdutor com variacao da sobreposicao dos dedos para filtros de ondas acusticas de superficie

Info

Publication number
PT91838A
PT91838A PT91838A PT9183889A PT91838A PT 91838 A PT91838 A PT 91838A PT 91838 A PT91838 A PT 91838A PT 9183889 A PT9183889 A PT 9183889A PT 91838 A PT91838 A PT 91838A
Authority
PT
Portugal
Prior art keywords
wav
overview
transducer
finger
filters
Prior art date
Application number
PT91838A
Other languages
English (en)
Other versions
PT91838B (pt
Inventor
Kimon Anemogiannis
Folkhard Mueller
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of PT91838A publication Critical patent/PT91838A/pt
Publication of PT91838B publication Critical patent/PT91838B/pt

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
    • H03H9/02—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
    • H03H9/14526—Finger withdrawal

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Coils Or Transformers For Communication (AREA)
PT91838A 1988-09-29 1989-09-28 Transdutor com variacao da sobreposicao dos dedos para filtros de ondas acusticas de superficie PT91838B (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3833101A DE3833101A1 (de) 1988-09-29 1988-09-29 Wandler mit weglasswichtung fuer oberflaechenwellenfilter

Publications (2)

Publication Number Publication Date
PT91838A true PT91838A (pt) 1990-03-30
PT91838B PT91838B (pt) 1995-07-18

Family

ID=6363993

Family Applications (1)

Application Number Title Priority Date Filing Date
PT91838A PT91838B (pt) 1988-09-29 1989-09-28 Transdutor com variacao da sobreposicao dos dedos para filtros de ondas acusticas de superficie

Country Status (8)

Country Link
EP (1) EP0436566B1 (pt)
JP (1) JPH03502868A (pt)
DE (2) DE3833101A1 (pt)
DK (1) DK12991D0 (pt)
ES (1) ES2016182A6 (pt)
GR (1) GR890100594A (pt)
PT (1) PT91838B (pt)
WO (1) WO1990003691A1 (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9802487D0 (sv) 1998-07-09 1998-07-09 Sandvik Ab Cemented carbide insert with binder phase enriched surface zone
JP3371849B2 (ja) 1999-04-28 2003-01-27 株式会社村田製作所 Ｓａｗ共振子、複合ｓａｗフィルタ及びｓａｗフィルタ

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254387A (en) * 1977-10-06 1981-03-03 U.S. Philips Corporation Acoustic wave devices
JPS57202114A (en) * 1981-06-05 1982-12-10 Hitachi Ltd Band pass filter
JPS5834047A (ja) * 1981-08-25 1983-02-28 坂井　康男 砕石機
US4506239A (en) * 1982-10-25 1985-03-19 Motorola, Inc. Compound surface acoustic wave matched filters
US4491758A (en) * 1983-05-03 1985-01-01 R F Monolithics, Inc. Surface wave device with oversampled withdrawal weighting
JPS63253712A (ja) * 1987-04-10 1988-10-20 Hitachi Ltd 弾性表面波バンドパスフイルタ

Also Published As

Publication number Publication date
PT91838B (pt) 1995-07-18
DK12991A (da) 1991-01-25
EP0436566B1 (de) 1993-03-10
WO1990003691A1 (de) 1990-04-05
GR890100594A (el) 1990-10-31
JPH03502868A (ja) 1991-06-27
DE3833101A1 (de) 1990-04-05
DE58903756D1 (de) 1993-04-15
EP0436566A1 (de) 1991-07-17
ES2016182A6 (es) 1990-10-16
DK12991D0 (da) 1991-01-25

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Legal Events

Date Code Title Description
MM3A Annulment or lapse

Free format text: LAPSE DUE TO NON-PAYMENT OF FEES

Effective date: 19960930