-
公开(公告)号：US20120069990A1
公开(公告)日：2012-03-22
申请号：US12885906
申请日：2010-09-20
IPC分类号： H04M1/78
CPC分类号： H04M1/745 , H04M3/005 , H04M3/18 , H04M2201/80
摘要： A device includes a plurality of subscriber line interface circuits and a shared protection device. Each subscriber line interface circuit has a voltage input terminal and first and second interface line terminals. The shared protection device is coupled to the interface line terminals and operable to sense a negative reference voltage representing a most negative one of the voltages present on the voltage input terminals and to provide overvoltage protection responsive to a voltage on at least one of the interface line terminals exceeding the negative reference voltage.
摘要翻译： 一种设备包括多个用户线接口电路和共享保护设备。 每个用户线接口电路具有电压输入端和第一和第二接口线端子。 共享保护装置耦合到接口线路终端并且可操作以感测代表电压输入端子上存在的最大负电压的负参考电压，并且响应于至少一个接口线路上的电压提供过电压保护 端子超过负参考电压。
-
公开(公告)号：US08705728B2
公开(公告)日：2014-04-22
申请号：US12885906
申请日：2010-09-20
IPC分类号： H04M1/00
CPC分类号： H04M1/745 , H04M3/005 , H04M3/18 , H04M2201/80
摘要： A device includes a plurality of subscriber line interface circuits and a shared protection device. Each subscriber line interface circuit has a voltage input terminal and first and second interface line terminals. The shared protection device is coupled to the interface line terminals and operable to sense a negative reference voltage representing a most negative one of the voltages present on the voltage input terminals and to provide overvoltage protection responsive to a voltage on at least one of the interface line terminals exceeding the negative reference voltage.
摘要翻译： 一种设备包括多个用户线接口电路和共享保护设备。 每个用户线接口电路具有电压输入端和第一和第二接口线端子。 共享保护装置耦合到接口线路终端并且可操作以感测代表电压输入端子上存在的最大负电压的负参考电压，并且响应于至少一个接口线路上的电压提供过电压保护 端子超过负参考电压。
-
搜索结果
2 条记录 (耗时 0.008 秒)