Line receiver circuit with large common mode range for differential input signals
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United States of America Patent
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May 22, 2001
Grant Date -
N/A
app pub date -
Feb 24, 2000
filing date -
Aug 25, 1997
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A line receiver circuit for receiving differential digital signals from a symmetrical transmission line comprises a first differential input stage (1) adapted to receive and process differential signals having a common mode voltage within a first common mode voltage range, and a second differential input stage (2) adapted to receive and process differential signals having a common mode voltage within a second common mode voltage range. Means (N5, N6) detect an operating condition of said first input stage (1) which operating condition depends on a common mode input voltage at said inputs of said first input stage. Means (P1, N7, N8) are provided for enabling said second input stage depending on said detected operating condition of said first input stage.
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