ES489418A1 - Perfeccionamientos en filtros acusticos de ondas superficia-les - Google Patents

Perfeccionamientos en filtros acusticos de ondas superficia-les

Info

Publication number
ES489418A1
ES489418A1 ES489418A ES489418A ES489418A1 ES 489418 A1 ES489418 A1 ES 489418A1 ES 489418 A ES489418 A ES 489418A ES 489418 A ES489418 A ES 489418A ES 489418 A1 ES489418 A1 ES 489418A1
Authority
ES
Spain
Prior art keywords
digital
center frequency
frequency
acoustic wave
wave 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.)
Expired
Application number
ES489418A
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.)
Siemens AG
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 ES489418A1 publication Critical patent/ES489418A1/es
Expired 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
    • H03H9/02—Details
    • H03H9/125—Driving means, e.g. electrodes, coils
    • H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14514—Broad band transducers
    • 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
    • H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
    • H03H9/14505—Unidirectional SAW transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Thermistors And Varistors (AREA)
  • Oscillators With Electromechanical Resonators (AREA)

Abstract

Perfeccionamientos en filtros acústicos de ondas superficiales con ondas acústicas cercanas a la superficie con un paso de amplitud F0 y una frecuencia media determinada de antemano f0 sobre un cuerpo de substrato piezoeléctrico con al menos dos estructuras digitales, que están previstas respectivamente como transformador de entrada, como transformador de salida, y, en caso de un resonador, como par selectivo reflector de ondas, de entre las cuales, al menos una de las estructuras digitales tiene un paso de amplitud ancho de banda F1 u al menos otras de las estructuras digitales, con una frecuencia media de f2 f0, tiene un paso de amplitud comparativamente estrecha de banda F2 F0, caracterizado porque, para evitar interferencias de paso de amplitud y del paso de fases (F0,O0) mediante reflexiones interdigitales con una señal de interferencia (FR), se mide desplazamiento la frecuencia media (f1) de la estructura digital de banda ancha (F1) con relación a la frecuencia media (f2) de la estructura digital al menos aproximadamente de banda 2 veces más estrecha (F2) en una magnitud de frecuencia (f) tal que uno de los puntos cero (fR1,2), dependientes de la posición de la frecuencia media (f1) de la estructura digital de banda ancha, de la señal de interferencia (FR) de las reflexiones interdigitales de la estructura digital de banda ancha (F1) se disponga al menos próxima al valor de la frecuencia media prevista de antemano (f0) del filtro.
ES489418A 1979-03-12 1980-03-11 Perfeccionamientos en filtros acusticos de ondas superficia-les Expired ES489418A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2909705A DE2909705C2 (de) 1979-03-12 1979-03-12 Akustische Oberflächenwellenanordnung

Publications (1)

Publication Number Publication Date
ES489418A1 true ES489418A1 (es) 1980-09-16

Family

ID=6065190

Family Applications (1)

Application Number Title Priority Date Filing Date
ES489418A Expired ES489418A1 (es) 1979-03-12 1980-03-11 Perfeccionamientos en filtros acusticos de ondas superficia-les

Country Status (11)

Country Link
US (1) US4325037A (es)
EP (1) EP0016979B1 (es)
JP (2) JPS55130219A (es)
AT (1) ATE4077T1 (es)
BR (1) BR8001429A (es)
CA (1) CA1137183A (es)
DE (1) DE2909705C2 (es)
ES (1) ES489418A1 (es)
HU (1) HU181685B (es)
SU (1) SU1346060A3 (es)
YU (1) YU67080A (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3438246A1 (de) * 1984-10-18 1986-04-24 Siemens AG, 1000 Berlin und 8000 München Akustisches wellenfilter
NO855284L (no) * 1985-01-18 1986-07-21 Siemens Ag Filter som arbeider med akustiske boelger.
NO855285L (no) * 1985-01-22 1986-07-23 Siemens Ag Filter som arbeider med akustiske boelger.
JPH0646692B2 (ja) * 1986-01-10 1994-06-15 株式会社日立製作所 弾性表面波共振子
US4731595A (en) * 1986-01-24 1988-03-15 Rf Monolithics, Inc. Resonator structure
DE19638627B4 (de) * 1996-09-20 2007-09-27 Epcos Ag Oberflächenwellen(OFW)-Filter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3582838A (en) * 1966-09-27 1971-06-01 Zenith Radio Corp Surface wave devices
US3550045A (en) * 1969-06-25 1970-12-22 Zenith Radio Corp Acoustic surface wave filter devices
GB1328343A (en) * 1969-09-17 1973-08-30 Mullard Ltd Electro mechanical filters
DE2132985C3 (de) * 1971-07-02 1981-06-04 Siemens AG, 1000 Berlin und 8000 München Piezoelektrisches Filter nach dem Oberflächenwellenprinzip
US3987376A (en) * 1974-03-22 1976-10-19 Hazeltine Corporation Acoustic surface wave device with harmonic coupled transducers
GB1529941A (en) * 1975-01-15 1978-10-25 Mullard Ltd Electrical filters including coupled resonators
DE2610183A1 (de) * 1975-03-12 1976-09-23 Murata Manufacturing Co Wellenfilter mit akustischer oberflaechenleitung
DE2615719A1 (de) * 1976-04-09 1977-10-27 Siemens Ag Filter nach dem oberflaechenwellenprinzip

Also Published As

Publication number Publication date
JPS55130219A (en) 1980-10-08
DE2909705C2 (de) 1984-09-06
EP0016979B1 (de) 1983-07-06
HU181685B (en) 1983-11-28
JPH026670Y2 (es) 1990-02-19
EP0016979A1 (de) 1980-10-15
BR8001429A (pt) 1980-11-11
ATE4077T1 (de) 1983-07-15
CA1137183A (en) 1982-12-07
JPS6312931U (es) 1988-01-28
YU67080A (en) 1983-06-30
US4325037A (en) 1982-04-13
SU1346060A3 (ru) 1987-10-15
DE2909705A1 (de) 1980-09-18

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