Ringing signal detector

Details Ringing signal detector Ringing signal detector

1978-02-09

1980-01-15

Konick, Bernard

H04M 126

Patent

active

041840534

ABSTRACT:
A ringing signal detector, which comprises a series diode clipper automatically biased by an input signal, a DC converter for converting the output of the series diode clipper to a DC level, a DC level detector for detecting the converted DC level to detect whether the input signal is a ringing signal or a dial pulse signal, thereby generating an output only when the input signal is the ringing signal.

REFERENCES:
patent: 3723656 (1973-03-01), Curtis et al.
patent: 3783193 (1974-01-01), Lee
patent: 4081617 (1978-03-01), Clark

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