Low power line selection circuit for a telephone
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United States of America Patent
Stats
-
Jun 26, 2001
Grant Date -
N/A
app pub date -
Oct 7, 1998
filing date -
Oct 7, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A line-powered circuit for connecting a telephone line to a telephone voice circuit comprised of a digital part and an analog part. The digital part is a logic circuit for generating a line connect signal that indicates a telephone line should be connected to the voice circuit. The power for operating the logic circuit is provided by the line voltage associated with the tip and ring leads of the telephone line. The analog part comprises a first switch means for connecting the voice circuit to the tip lead in response to the line connect signal, and a second switch means for connecting the voice circuit to a ring lead in response to the line connect signal.
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