JPS56128011A - Surface elastic wave filter - Google Patents

Surface elastic wave filter

Info

Publication number
JPS56128011A
JPS56128011A JP3141980A JP3141980A JPS56128011A JP S56128011 A JPS56128011 A JP S56128011A JP 3141980 A JP3141980 A JP 3141980A JP 3141980 A JP3141980 A JP 3141980A JP S56128011 A JPS56128011 A JP S56128011A
Authority
JP
Japan
Prior art keywords
sequence
phase
negative
surface elastic
electrodes
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
JP3141980A
Other languages
Japanese (ja)
Inventor
Yuji Higuchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP3141980A priority Critical patent/JPS56128011A/en
Publication of JPS56128011A publication Critical patent/JPS56128011A/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
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02818—Means for compensation or elimination 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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves
    • H03H9/6489—Compensation of undesirable effects

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To remove an electrical leakage wave by constituting a filter so that electric signals applied to two reed screen electrodes are made a negative-phase-sequence to each other, and also surface elastic waves made by the respective reed scrren electrodes are made same as above. CONSTITUTION:Reed screen electrodes 2, 3 and 10, 11 constitute two sets of surface elastic wave filters. These filters are connected as if connection to the electrical signal source 8 and the load 6 were a negative-phase-sequence, but the output signals are added by a positive-phase-sequence since the electrode 2 among the electrodes 2, 3, 10, 11 is a negative-phase-sequence. As a result, electrical leakage waves 12, 13 become a negative-phase-sequence, and are offset. The leakage waves 15, 16 are also all the same.
JP3141980A 1980-03-11 1980-03-11 Surface elastic wave filter Pending JPS56128011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3141980A JPS56128011A (en) 1980-03-11 1980-03-11 Surface elastic wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3141980A JPS56128011A (en) 1980-03-11 1980-03-11 Surface elastic wave filter

Publications (1)

Publication Number Publication Date
JPS56128011A true JPS56128011A (en) 1981-10-07

Family

ID=12330732

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3141980A Pending JPS56128011A (en) 1980-03-11 1980-03-11 Surface elastic wave filter

Country Status (1)

Country Link
JP (1) JPS56128011A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157315A (en) * 1983-12-22 1985-08-17 ノ−ザン・テレコム・リミテツド Surface sound wave element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157315A (en) * 1983-12-22 1985-08-17 ノ−ザン・テレコム・リミテツド Surface sound wave element

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