Circuits and methods for implementing a residue amplifier are provided. In some embodiments, circuits for implementing a residue amplifier are provided, the circuits comprising: a first capacitor configured to be charged to an input voltage level and that discharges from the input voltage level to a reference voltage level; a comparator having a first input coupled to the first capacitor, a second input coupled to a reference voltage source, and an output that indicates when the charge on the first capacitor is above the reference voltage level; and a second capacitor configured to be charged to an output voltage based on the output of the comparator.