TW225059B - Piezo-electric ceramic filter circuit and piezo-electric ceramic filter - Google Patents

Piezo-electric ceramic filter circuit and piezo-electric ceramic filter

Info

Publication number
TW225059B
TW225059B TW082105138A TW82105138A TW225059B TW 225059 B TW225059 B TW 225059B TW 082105138 A TW082105138 A TW 082105138A TW 82105138 A TW82105138 A TW 82105138A TW 225059 B TW225059 B TW 225059B
Authority
TW
Taiwan
Prior art keywords
electric ceramic
piezo
ceramic filter
dfo
filter circuit
Prior art date
Application number
TW082105138A
Other languages
Chinese (zh)
Inventor
Katashi Momiyama
Ikuo Kato
Original Assignee
Tdk Corp
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 Tdk Corp filed Critical Tdk Corp
Priority claimed from PCT/JP1993/000922 external-priority patent/WO1994001931A1/en
Application granted granted Critical
Publication of TW225059B publication Critical patent/TW225059B/en

Links

Abstract

In this invention, a plurality of piezo electric ceramic filters having different central frequency are connected cascaded. The absolute value of frequency difference dFo of the central frequency of the piezo electric ceramic filters is denoted by 3 dFo 3, when the insertion loss is less than 3dB, the pass band width is BW3, at this condition the relation of o<徭FoBW3 < 0.8 can be satisfied. By this way, the insertion loss can be decreased and the group delay character can be improved.
TW082105138A 1993-07-05 1993-06-28 Piezo-electric ceramic filter circuit and piezo-electric ceramic filter TW225059B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1993/000922 WO1994001931A1 (en) 1992-07-07 1993-07-05 Piezoelectric ceramic filter circuit and piezoelectric ceramic filter

Publications (1)

Publication Number Publication Date
TW225059B true TW225059B (en) 1994-06-11

Family

ID=51454278

Family Applications (1)

Application Number Title Priority Date Filing Date
TW082105138A TW225059B (en) 1993-07-05 1993-06-28 Piezo-electric ceramic filter circuit and piezo-electric ceramic filter

Country Status (1)

Country Link
TW (1) TW225059B (en)

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