A differential transmission line driver with supplemental current sources
that overcome switching anomalies and EMU issues when the logic state of
the driver is switching. During a logic transition, a current source,
that is directed to the output of the driver, may be prevented from
delivering its current. The present invention provides a supplemental
current that is active during this transition period to supply the
missing current. The present disclosure also details a common mode
circuit that maintains a stable common mode output level to help control
EMI issues when the power supply for the driver changes.