Ringing signal detector
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United States of America Patent
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-
Jan 15, 1980
Grant Date -
N/A
app pub date -
Feb 9, 1978
filing date -
Feb 12, 1977
priority date (Note) -
Expired
status (Latency Note)
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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.
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