A new fast and accurate current-mode folding amplifier

In this paper we present a current mode saw-tooth folding amplifier with a minimal number of current mirrors in the signal path from input to output. This minimizes the delays imposed by current mirrors on the speed of the amplifier. The amplifier has a full scale delay of 5.9ns which is more than four times faster than presented in previous literature. The operation is verified in simulation using LFoundry 150nm process in Cadence Tools.