An offset-tolerant current-sampling-based sense amplifier for Sub-100nA-cell-current nonvolatile memory

In this study, the authors propose a new offset tolerant current-sampling-based SA (CSB-SA) to achieve 7x faster read speed than previous SAs for sensing small
ICELL
. A fabricated 90nm 512Kb OTP macro, using the CSB-SA and our CMOS-logic compatible OTP cell, achieves 26ns macro random access time for reading sub-200nA
lCELL
. Measurements also confirmed that this 90nm CSB-SA could achieve sub-100nA sensing.