Circuit arrangement for suppressing interference signals on the

Details Circuit arrangement for suppressing interference signals on the Circuit arrangement for suppressing interference signals on the

1986-06-11

1987-10-20

Rubinson, Gene Z.

Telephonic communications

With usage measurement

Call charge metering or monitoring

379405, H04Q 1104, H04Q 324

Patent

active

047019476

ABSTRACT:
A circuit arrangement for suppressing interference signals on the receiving arm of a subscriber line circuit is constructed from electronic components and thus comprises no speech transformers. The receiving arm of the subscriber line circuit (SLIC) is connected to a two-pole filter circuit (ZF) which consists of the parallel arrangement of a parallel--and a series--resonance circuit (LP,CP and LS,CS), the resonance frequency of which corresponds to the frequency of the signals which are fed-in for the transmission of charge pulses and which charge pulses can manifest themselves as interference signals when reflected without the provision of the described measures.

REFERENCES:
patent: 3097266 (1963-07-01), Luscher
patent: 3941935 (1976-03-01), Vicentini et al.

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