Line circuit
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United States of America Patent
Stats
-
Feb 2, 1982
Grant Date -
N/A
app pub date -
Apr 21, 1980
filing date -
May 10, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A line circuit comprising a terminal for connection of a wire of a subscriber's line for applying thereto a line current which is determined by the impedance of the subscriber's line and an alternating current which is superimposed on the line current, the circuit further comprising an amplifier and a current injection circuit connected to the output of the amplifier for supplying a portion of the line current, determined by the impedance of the current injection circuit, the amplifier supplying the remaining portion of the line current.
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