Analyser for a multifrequency code receiver operating on coded pulses

摘要

The invention relates to multifrequency signalling receivers. An analyser for a multifrequency signalling receiver comprises in particular a filter unit B1 connected to a comparator B2 itself connected to a supervisory logic unit B3, a decoder B5, a digital/analog converter B4, a digital comparator B6, an output code register B7 and a timer B8. Application to telephony. <IMAGE>