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ApplicationNo. 838333 filed on 04/08/1997
US Classes:725/121, Return path333/126, For providing frequency separation333/134, Utilizing long line element725/126, Detail of use of two-way spectrum725/127, Network component (e.g., filter, tap, splitter, amplifier, repeater, etc.)725/128Diplex filter
ExaminersPrimary: Peng, John K.
Assistant: Miller, John
Attorney, Agent or Firm
Foreign Patent References
International ClassesH04H 001/00
AbstractA cable television system employs two-way communication between a headend and at least one subscriber terminal. The two-way communication is provided by having separate frequency bands for each communication path. The frequency bands do not overlap and the higher frequency band is used for subscriber terminal to headend transmissions. A line amplifier is provided that employs two diplex filters each connected to both a forward and reverse amplifier. The high pass portions of the diplex filters are formed from both lumped and distributed components.