An integrator circuit (110) is provided including an amplifier element
(170) configured to receive an input signal at an input node, amplify the
input signal, and provide an amplified input signal at an output node; a
feedback capacitor element (175) connected between the output node and
the input node; and a current matching circuit (120) connected to the
output node, and configured to sense an output voltage of the amplifier
element and to provide a supplemental current (I.sub.M) to the input node
that is less than or equal to a feedback current (I.sub.F) charging the
feedback capacitor element. This supplemental current is substantially
equal and opposite in polarity to a feedback current when the output
voltage satisfies a set criterion.