Line driver for coupling a data transceiver to a line
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United States of America Patent
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N/A
Issued Date -
Mar 30, 2006
app pub date -
Sep 15, 2005
filing date -
Sep 15, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A line driver circuit couples a data transceiver to a line. The line driver includes a differential amplifier which receives a signal for transmission on the line. First and second feedback paths connect between outputs of the amplifier and inputs of the amplifier. A bridge couples the differential amplifier to the line. The bridge comprises two matching impedance and two secondary transformer winding. Each matching impedance is connected in series with a secondary transformer winding between the outputs of the amplifiers. Two feedback branches connect between internal nodes of the secondary windings and the inputs of the differential amplifier. The line driver circuit is less sensitive to accuracy of component values while providing an increased dynamic on the line for a given dynamic of the transceiver and a given attenuation of the received signal.
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