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1.发明授权Modulator having variable magnitude impedance for regulating the operating attenuation 失效具有可变幅度阻抗的调制器用于调节工作衰减
公开(公告)号：US3239780A
公开(公告)日：1966-03-08
申请号：US29862163
申请日：1963-07-30
Applicant: ERICSSON TELEFON AB L M
Inventor： PETER ECHARTI FRIEDRICH KARL
IPC: H03C1/54
CPC classification number: H03C1/545
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公开(公告)号：US3355678A
公开(公告)日：1967-11-28
申请号：US41096764
申请日：1964-11-13
Applicant: ERICSSON TELEFON AB L M
Inventor： PETER ECHARTI FRIEDRICH KARL
IPC: H03C1/54
CPC classification number: H03C1/545
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