JPS55165016A - Piezoelectric filter - Google Patents

Piezoelectric filter

Info

Publication number
JPS55165016A
JPS55165016A JP7276779A JP7276779A JPS55165016A JP S55165016 A JPS55165016 A JP S55165016A JP 7276779 A JP7276779 A JP 7276779A JP 7276779 A JP7276779 A JP 7276779A JP S55165016 A JPS55165016 A JP S55165016A
Authority
JP
Japan
Prior art keywords
electrodes
piezoelectric
piezoelectric filter
electrode
sprious
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
JP7276779A
Other languages
Japanese (ja)
Inventor
Jiro Inoue
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.)
NOTO DENSHI KOGYO KK
Original Assignee
NOTO DENSHI KOGYO KK
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 NOTO DENSHI KOGYO KK filed Critical NOTO DENSHI KOGYO KK
Priority to JP7276779A priority Critical patent/JPS55165016A/en
Publication of JPS55165016A publication Critical patent/JPS55165016A/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 elements; Electromechanical resonators
    • H03H9/46—Filters
    • H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
    • H03H9/56—Monolithic crystal filters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

PURPOSE:To improve the symmetry of filtering characteristics and sprious performance, by providing concaves on the piezoelectric plate between the input and output electrodes, in a three-terminal type piezoelectric filter. CONSTITUTION:An input electrode 2 and an output electrode 3 are formed to one surface of a piezoelectric porcelain plate 1 and an electrode 4 being a pair with the electrodes 2, 3 is formed on another surface, to constitute the three-terminal type piezoelectric filter. In this piezoelectric filter, a concave 5 of channel shape in the cross section, for example, is provided with the piezoelectric plate between the electrodes 2 and 3. Thus, the stray capacitance between the electrodes 2, 3 is reduced, and the symmetry of the filtering characteristics and the sprious performance are improved and the bottom level can remarkably be lowered.
JP7276779A 1979-06-08 1979-06-08 Piezoelectric filter Pending JPS55165016A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7276779A JPS55165016A (en) 1979-06-08 1979-06-08 Piezoelectric filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7276779A JPS55165016A (en) 1979-06-08 1979-06-08 Piezoelectric filter

Publications (1)

Publication Number Publication Date
JPS55165016A true JPS55165016A (en) 1980-12-23

Family

ID=13498849

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7276779A Pending JPS55165016A (en) 1979-06-08 1979-06-08 Piezoelectric filter

Country Status (1)

Country Link
JP (1) JPS55165016A (en)

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