2018 Volume 15 Issue 10 Pages 20180332
An offset voltage suppressed sense amplifier (SA) with self-adaptive distribution transformation technique is proposed. By means of the peripheral assisted circuits, the offset voltage of the proposed SA will be automatically judged, and the most appropriate offset amount will be selected to narrow the distribution of the offset voltage in two stages. Moreover, the calibration results can be locked in the peripheral circuits by the initialization operation, thus, the calibration process is unnecessary for each read operation. Compared with the conventional voltage latch SA (VLSA) and the robust latch-type SA (RLSA), the simulation results show that the offset voltage of the proposed SA is reduced by 57.1% and 45.4%, respectively, at 1.2 V supply voltage with TT corner in TSMC 65-nm CMOS technology. Additionally, under the extreme conditions, it is also reduced by 49.9∼58.3% and 35.8∼47.9% compared with that of the VLSA and RLSA, respectively.
