TY - GEN
T1 - 1.2V constant-gm rail-to-rail CMOS Op-Amp input stage with new overlapped transition regions technique for ECG amplifier
AU - Lee, Boram
AU - Higman, Ted
PY - 2013
Y1 - 2013
N2 - The conventional technique of overlapped transition regions for producing a constant transconductance rail to rail Op-Amp input stage can only tolerate a limited amount of voltage shifting. This is limited by the minimum Vgs required for active mode operation of transistors. In this paper, we present a novel overlapped transition regions technique that overcomes the limitation of the conventional technique. This new overlapped transition regions technique has no voltage shifting limit. For both N-type and P-type conventional complementary differential input pairs, one source follower and one MOSFET are added to control the saturation point of current of input pairs. For 1.2V single supply voltage, simulation results demonstrate ±3.71% of overall transconductance variation. Cadence SPECTRE simulator and TSMC 0.25-μm CMOS technology are used to layout and simulate this work.
AB - The conventional technique of overlapped transition regions for producing a constant transconductance rail to rail Op-Amp input stage can only tolerate a limited amount of voltage shifting. This is limited by the minimum Vgs required for active mode operation of transistors. In this paper, we present a novel overlapped transition regions technique that overcomes the limitation of the conventional technique. This new overlapped transition regions technique has no voltage shifting limit. For both N-type and P-type conventional complementary differential input pairs, one source follower and one MOSFET are added to control the saturation point of current of input pairs. For 1.2V single supply voltage, simulation results demonstrate ±3.71% of overall transconductance variation. Cadence SPECTRE simulator and TSMC 0.25-μm CMOS technology are used to layout and simulate this work.
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U2 - 10.1109/EMBC.2013.6610284
DO - 10.1109/EMBC.2013.6610284
M3 - Conference contribution
C2 - 24110471
AN - SCOPUS:84886532405
SN - 9781457702167
VL - 2013
T3 - Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
SP - 3451
EP - 3454
BT - Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
T2 - 2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2013
Y2 - 3 July 2013 through 7 July 2013
ER -