JPS5597722A - Elastic surface wave device - Google Patents

Elastic surface wave device

Info

Publication number
JPS5597722A
JPS5597722A JP505379A JP505379A JPS5597722A JP S5597722 A JPS5597722 A JP S5597722A JP 505379 A JP505379 A JP 505379A JP 505379 A JP505379 A JP 505379A JP S5597722 A JPS5597722 A JP S5597722A
Authority
JP
Japan
Prior art keywords
converter
surface wave
elastic surface
center frequency
output
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.)
Pending
Application number
JP505379A
Other languages
Japanese (ja)
Inventor
Katsuhide Tsukamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP505379A priority Critical patent/JPS5597722A/en
Publication of JPS5597722A publication Critical patent/JPS5597722A/en
Pending 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
    • H03H9/6423—Means for obtaining a particular transfer characteristic
    • H03H9/6426—Combinations of the characteristics of different 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
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination of undesirable effects
    • H03H9/02842—Means for compensation or elimination of undesirable effects of reflections
    • H03H9/0285—Means for compensation or elimination of undesirable effects of reflections of triple transit echo
    • 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
    • H03H9/14597—Matching SAW transducers to external electrical circuits

Abstract

PURPOSE:To obtain filter characteristics with a small shape factor and deep trap by providing a 2nd converter differing in center frequency at a position where no interference with an elastic surface wave generated by a 1st converter is caused. CONSTITUTION:On the surface of piezoelectric body 1, 1st input elastic surface wave converter 2 is provided and on a propagation path for an elastic surface wave generated by converter 2, 1st output elastic surface wave converter 3 is provided. Further, 2nd elastics surface wave converter 4 is provided where the elastic surface wave of converter 2 does not interfere. Although center frequency f1 of 1st converter 2 is not equal to center frequency f2 of 2nd converter 4, they are coupled through matching circuits 6 and 7 respectively and then connected to signal sourse 5. An output appears in load 8 connected to 1st output elastic surface wave converter 3.
JP505379A 1979-01-19 1979-01-19 Elastic surface wave device Pending JPS5597722A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP505379A JPS5597722A (en) 1979-01-19 1979-01-19 Elastic surface wave device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP505379A JPS5597722A (en) 1979-01-19 1979-01-19 Elastic surface wave device

Publications (1)

Publication Number Publication Date
JPS5597722A true JPS5597722A (en) 1980-07-25

Family

ID=11600649

Family Applications (1)

Application Number Title Priority Date Filing Date
JP505379A Pending JPS5597722A (en) 1979-01-19 1979-01-19 Elastic surface wave device

Country Status (1)

Country Link
JP (1) JPS5597722A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000070758A1 (en) * 1999-05-14 2000-11-23 Kabushiki Kaisha Toshiba Surface acoustic wave device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000070758A1 (en) * 1999-05-14 2000-11-23 Kabushiki Kaisha Toshiba Surface acoustic wave device
US6462633B1 (en) 1999-05-14 2002-10-08 Kabushiki Kaisha Toshiba Surface acoustic wave device including parallel connected main and sub-filters

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