专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明专利

JPS54109355A MECHANICAL FILTER 失效
公开(公告)号：JPS54109355A
公开(公告)日：1979-08-27
申请号：JP1625978
申请日：1978-02-15
申请人： FUJITSU LTD
发明人： KASAI YOSHIHIKO , GOUNJI TAKU , KATSUBE YOSHIO
IPC分类号： H03H9/46 , H03H9/50
摘要： PURPOSE:To manufacture easily a filter of high precision by setting lengths of mechanical resonators of a filter, arranged on the same plane with length directions of resonators made in parallel, to values different in coupler bending mode and by coupling resonators by one coupler. CONSTITUTION:The mechanical filter which has piezoelectric magnetic plates P1 to P2 equipped and bending vibration converting resonators R1 to R8 arranged on the same plane with their length directions made in parallel is provided with coupling elements C1 to C6 anc skip couplers C7 and C8 in a longitudinal elastic mode coupling respective resonators R1 to R8. Among those couplers C1 to C6, the lengths of couplers between resonators R2 and R3, and R6 and R7 are selected between the primary and secondary ones of bending mode resonance, and those of couplers between resonators R3 and R4, R4 and R5, and R5 and R6 are between those between the secondary and tertiary of bending mode resonance to expand the selective ranges of diameters and lengths of couplers, to that couplers C3 and C4 will be realized by one coupler.

IPRDB