Differential cascode current mode driver
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United States of America Patent
Stats
-
Aug 10, 2004
Grant Date -
Jul 3, 2003
app pub date -
Feb 14, 2003
filing date -
Apr 16, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A current mode driver includes a tail current device, a differential pair of input transistors, cascode output transistors, and pre-charge circuits to charge cascode nodes between the differential pair of input transistors and the cascode output transistors. The current mode driver is driven by CMOS drivers that alternately turn the input transistors on and off. A wide-swing bias circuit provides bias voltages for the current mode driver. This bias voltage for the tail current device is closely matched to provide current matching between the bias circuit and the current mode driver.
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