A comparator circuit having reduced pulse width distortion includes a
differential amplifier operative to receive at least first and second
signals and to amplify a difference between the first and second signals.
The differential amplifier generates a difference signal at an output
thereof which is a function of the difference between the first and
second signals. An output stage is included in the comparator circuit for
receiving the difference signal and for generating an output signal of
the comparator circuit, the output signal being representative of the
difference signal, the output stage having a switching point associated
therewith. The comparator circuit further includes a voltage source
coupled to the output of the differential amplifier. The voltage source
is operative to generate a reference signal for establishing a
common-mode voltage of the difference signal generated by the
differential amplifier. The reference signal is substantially centered
about the switching point of the output stage and substantially tracks
the switching point over variations in process, voltage and/or
temperature conditions to which the comparator circuit is subjected.