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公开(公告)号：US3456214A
公开(公告)日：1969-07-15
申请号：US3456214D
申请日：1967-04-06
Applicant: BELL TELEPHONE LABOR INC
Inventor： BIES FRANK R
CPC classification number: H03H9/542
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公开(公告)号：US3566314A
公开(公告)日：1971-02-23
申请号：US3566314D
申请日：1968-02-27
Applicant: BELL TELEPHONE LABOR INC
Inventor： BIES FRANK R
CPC classification number: H03H9/0095 , H03H9/542
Abstract: IN A CRYSTAL FILTER HAVING A PLURALITY OF PASSBANDS, RESISTANCES OF PREDETERMINED VALUE AS DERIVATED FROM AND RELATED TO SPECIFIC CIRCUIT PARAMETERS ARE INSERTED IN SERIES AND IN PARALLEL WITH THE CRYSTAL UNITS TO MAINTAIN THE PASSBANDS AND THE ATTENUATION BETWEEN THE PASSBANDS FLAT AND CONSTANT AND TO HOLD THE ATTENTUATION RATIO BETWEEN ALL OF THE PASSBANDS AND THE REGIONS OUTSIDE OF THE PASSBANDS AT A FIXED, PREDETERMINED LEVEL.
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3.发明授权Tee-network having single centertapped high-q inductor in its series branches and a low-q inductor in shunt 失效Tee网络在其串联分支中具有单个高密度电感器，在分流器中具有低Q电感器
公开(公告)号：US3344369A
公开(公告)日：1967-09-26
申请号：US37300864
申请日：1964-06-05
Applicant: BELL TELEPHONE LABOR INC
Inventor： BIES FRANK R , SYKES ROGER A
IPC: H03H9/54
CPC classification number: H03H9/542
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公开(公告)号：US2406796A
公开(公告)日：1946-09-03
申请号：US52776444
申请日：1944-03-23
Applicant: BELL TELEPHONE LABOR INC
Inventor： BIES FRANK R
CPC classification number: H03H9/542 , H03H9/0095
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