The effect of a replica-amp gain enhancement technique on the settling time of a two-stage op-amp is analyzed. It is found that since the added poles and zeros are comparable to the closed-loop bandwidth, there is only a small effect on the settling time. This analytical result is confirmed by both SPICE simulation and test-chip measurements
Published in:
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
(Volume:42
,
Issue:
3
)
Date of Publication: Mar 1995