公开(公告)号：US5315653A

公开(公告)日：1994-05-24

申请号：US880213

申请日：1992-05-05

申请人： Marco Siligoni ,  Vanni Saviotti ,  Maria L. Marcioni

发明人： Marco Siligoni ,  Vanni Saviotti ,  Maria L. Marcioni

IPC分类号： H02J1/00 ,  H04M19/00 ,  H04Q3/42

CPC分类号： H04M19/005

摘要： An electronic interface circuit between a telephone subscriber line and a telephone main exchange is disclosed which forms, with the main exchange battery, a supply bridge for the telephone line, with limitation of the line current to a predetermined threshold value. The voltage/current characteristic of the supply bridge is balanced for lower values of the line current than the threshold current and is unbalanced whenever the line current attains said threshold current.

摘要翻译： 公开了电话用户线路和电话主交换机之间的电子接口电路，其与主交换电池形成用于电话线路的供电桥，线路电流的限制为预定阈值。 电源电桥的电压/电流特性与线路电流的值相比阈值电流平衡，每当线电流达到所述阈值电流时，电压/电流特性就会不平衡。