JPS5394155A - Elastic surface wave filter - Google Patents

Elastic surface wave filter

Info

Publication number
JPS5394155A
JPS5394155A JP772077A JP772077A JPS5394155A JP S5394155 A JPS5394155 A JP S5394155A JP 772077 A JP772077 A JP 772077A JP 772077 A JP772077 A JP 772077A JP S5394155 A JPS5394155 A JP S5394155A
Authority
JP
Japan
Prior art keywords
wave filter
surface wave
elastic surface
filter
decreasing
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
JP772077A
Other languages
Japanese (ja)
Other versions
JPS5947494B2 (en
Inventor
Takeshi Hazama
Jun Yamada
Hitoshi Yanagihara
Yoshihiko Noro
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP772077A priority Critical patent/JPS5947494B2/en
Publication of JPS5394155A publication Critical patent/JPS5394155A/en
Publication of JPS5947494B2 publication Critical patent/JPS5947494B2/en
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
    • H03H9/46—Filters
    • H03H9/64—Filters using surface acoustic waves

Landscapes

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

Abstract

PURPOSE:To eliminate the unnecessary secondary effect by decreasing the electrode logarithm as well as to realize a small size for the filter by improving the group delay characteristics.
JP772077A 1977-01-28 1977-01-28 surface acoustic wave filter Expired JPS5947494B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP772077A JPS5947494B2 (en) 1977-01-28 1977-01-28 surface acoustic wave filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP772077A JPS5947494B2 (en) 1977-01-28 1977-01-28 surface acoustic wave filter

Publications (2)

Publication Number Publication Date
JPS5394155A true JPS5394155A (en) 1978-08-17
JPS5947494B2 JPS5947494B2 (en) 1984-11-19

Family

ID=11673555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP772077A Expired JPS5947494B2 (en) 1977-01-28 1977-01-28 surface acoustic wave filter

Country Status (1)

Country Link
JP (1) JPS5947494B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648708A (en) * 1979-09-28 1981-05-02 Hitachi Ltd Surface elastic wave filter
JPS5671620U (en) * 1979-11-02 1981-06-12
US4458221A (en) * 1981-09-11 1984-07-03 Tokyo Shibaura Denki Kabushiki Kaisha Surface acoustic wave filter
JPS60249412A (en) * 1984-04-09 1985-12-10 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Elastic surface wave electric filter and method of producingsame

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6692762B2 (en) 2017-02-13 2020-05-13 日本電産コパル電子株式会社 Torque sensor
JP6817841B2 (en) 2017-02-17 2021-01-20 日本電産シンポ株式会社 Reducer with electric motor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648708A (en) * 1979-09-28 1981-05-02 Hitachi Ltd Surface elastic wave filter
JPH0224050B2 (en) * 1979-09-28 1990-05-28 Hitachi Ltd
JPS5671620U (en) * 1979-11-02 1981-06-12
JPS641793Y2 (en) * 1979-11-02 1989-01-17
US4458221A (en) * 1981-09-11 1984-07-03 Tokyo Shibaura Denki Kabushiki Kaisha Surface acoustic wave filter
JPS60249412A (en) * 1984-04-09 1985-12-10 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Elastic surface wave electric filter and method of producingsame

Also Published As

Publication number Publication date
JPS5947494B2 (en) 1984-11-19

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