JPS5624820A - Piezoelectric unit - Google Patents

Piezoelectric unit

Info

Publication number
JPS5624820A
JPS5624820A JP10037079A JP10037079A JPS5624820A JP S5624820 A JPS5624820 A JP S5624820A JP 10037079 A JP10037079 A JP 10037079A JP 10037079 A JP10037079 A JP 10037079A JP S5624820 A JPS5624820 A JP S5624820A
Authority
JP
Japan
Prior art keywords
delay time
group delay
time characteristics
piezoelectric material
vibration part
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
JP10037079A
Other languages
Japanese (ja)
Inventor
Takamichi Kitajima
Junichi Nishino
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 JP10037079A priority Critical patent/JPS5624820A/en
Publication of JPS5624820A publication Critical patent/JPS5624820A/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
    • H03H9/54—Filters comprising resonators of piezo-electric or electrostrictive material
    • H03H9/56—Monolithic crystal filters

Abstract

PURPOSE:To control group delay time characteristics by sticking or press-contacting an elastic body to at least one surface side vibration part of a piezoelectric substrate. CONSTITUTION:Silicone rubber pieces 19, 20, 21 and 22 are provided where there are cavities provided to protect the vibration of filter element 1. Consequently, group delay time characteristics can freely be controlled by adequately suppressing the vibration part. This provides the same effect with that obtained when a piezoelectric material high in Q is used while another piezoelectric material low in Q is also used.
JP10037079A 1979-08-06 1979-08-06 Piezoelectric unit Pending JPS5624820A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10037079A JPS5624820A (en) 1979-08-06 1979-08-06 Piezoelectric unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10037079A JPS5624820A (en) 1979-08-06 1979-08-06 Piezoelectric unit

Publications (1)

Publication Number Publication Date
JPS5624820A true JPS5624820A (en) 1981-03-10

Family

ID=14272156

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10037079A Pending JPS5624820A (en) 1979-08-06 1979-08-06 Piezoelectric unit

Country Status (1)

Country Link
JP (1) JPS5624820A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994001931A1 (en) * 1992-07-07 1994-01-20 Tdk Corporation Piezoelectric ceramic filter circuit and piezoelectric ceramic filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994001931A1 (en) * 1992-07-07 1994-01-20 Tdk Corporation Piezoelectric ceramic filter circuit and piezoelectric ceramic filter
US5850166A (en) * 1992-07-07 1998-12-15 Tdk Corporation Piezoelectric ceramic filter circuit and piezoelectric ceramic filter

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