Subscriber circuit link interface for an automatic telephone exchange
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United States of America Patent
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-
Jun 21, 1988
Grant Date -
N/A
app pub date -
May 20, 1985
filing date -
May 18, 1984
priority date (Note) -
Expired
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Abstract
The interface of the invention comprises a power supply circuit (16) which is a symmetrical amplifier circuit, and a hybrid circuit (29) controlling the power supply circuit in DC and in AC. The hybrid includes a phase shifter circuit (44, 45) simulating long lines. Application: private telephony.
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