Circuit arrangement for suppressing weighted noise in telephone connections through-connected according to the PCM principle

摘要

In the circuit arrangement according to the invention, a bit pattern comparator is provided which supplies an activation signal for a delay device when the binary value of the received PCM word is equal to or less than a very low preset binary value, and supplies a deactivation signal for the delay device when the binary value of the received PCM word is equal to or greater than a different, higher preset binary value. The output signal which is then emitted by the delay device passes on to a multiplexer for PCM words which, if the delay device is activated and operational, emits a >>zero<< value PCM word and, if the delay device is deactivated, through-connects the received PCM word directly for forwarding.