JPS55135411A - Surface elastic wave filter circuit - Google Patents

Surface elastic wave filter circuit

Info

Publication number
JPS55135411A
JPS55135411A JP4305179A JP4305179A JPS55135411A JP S55135411 A JPS55135411 A JP S55135411A JP 4305179 A JP4305179 A JP 4305179A JP 4305179 A JP4305179 A JP 4305179A JP S55135411 A JPS55135411 A JP S55135411A
Authority
JP
Japan
Prior art keywords
elastic wave
input
surface elastic
wave filter
omega
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
JP4305179A
Other languages
Japanese (ja)
Inventor
Chikao Aoki
Nobuyoshi Sakamoto
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP4305179A priority Critical patent/JPS55135411A/en
Publication of JPS55135411A publication Critical patent/JPS55135411A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks

Landscapes

  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

PURPOSE:To realize the miniaturization of the element by securing the periodic delay time between the output and the input of the surface elastic wave filter and also performing the analog addition for the positive feedback amount and the external input for supply. CONSTITUTION:Input 6 passes through surface elastic wave filter 2 to receive the delay of one cycle or its integer-fold value, and is also beta-folded via amplifier 3 and then added to the input signal given from input terminal 1 to be input 6 of surface elastic wave 2. The transmission function is expressed as H'(omega)/(1-H'(omega)) between input terminal 1 and output terminal 7 of the surface elastic wave filter, thus securing the narrow band in comparison with transmission function H'(omega) of the single unit of filter 2.
JP4305179A 1979-04-11 1979-04-11 Surface elastic wave filter circuit Pending JPS55135411A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4305179A JPS55135411A (en) 1979-04-11 1979-04-11 Surface elastic wave filter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4305179A JPS55135411A (en) 1979-04-11 1979-04-11 Surface elastic wave filter circuit

Publications (1)

Publication Number Publication Date
JPS55135411A true JPS55135411A (en) 1980-10-22

Family

ID=12653073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4305179A Pending JPS55135411A (en) 1979-04-11 1979-04-11 Surface elastic wave filter circuit

Country Status (1)

Country Link
JP (1) JPS55135411A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002232256A (en) * 2001-02-05 2002-08-16 Masaki Kobayashi Surface acoustic wave filter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419633A (en) * 1977-07-11 1979-02-14 Westinghouse Canada Ltd Notch filter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5419633A (en) * 1977-07-11 1979-02-14 Westinghouse Canada Ltd Notch filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002232256A (en) * 2001-02-05 2002-08-16 Masaki Kobayashi Surface acoustic wave filter
JP4546652B2 (en) * 2001-02-05 2010-09-15 正樹 小林 Surface acoustic wave filter

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