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公开(公告)号：US3551838A
公开(公告)日：1970-12-29
申请号：US3551838D
申请日：1969-05-05
申请人： CESARE VALFRE
发明人： VALFRE CESARE
CPC分类号： H04B3/18
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公开(公告)号：US3684975A
公开(公告)日：1972-08-15
申请号：US3684975D
申请日：1970-07-10
申请人： CESARE VALFRE
发明人： VALFRE CESARE
CPC分类号： H04B3/16
摘要： A negative impedance amplifier for a transmission line having two transformers and an amplifier. The size of the transformers is reduced and the resulting losses are compensated by increasing the gain of the amplifier. A negative feedback loop also reduces losses. A capacitor circuit is placed on the line connections to permit remote feeding. The transformers can be connected to the amplifier to provide for either series type or parallel type connection to the line.
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3.发明授权Transistor negative impedance amplifier,stable in short circuit,particularly for telephone systems 失效晶体管负阻抗放大器，短路电路稳定，特别适用于电话系统
公开(公告)号：US3503002A
公开(公告)日：1970-03-24
申请号：US3503002D
申请日：1966-06-06
发明人： VALFRE CESARE
CPC分类号： H04B3/18
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