An Offset-Tolerant Fast-Random-Read Current-Sampling-Based Sense Ampli fier for S

Abstract

Decreasing read cell current has become a major trend in nonvolatile memory (NVM ). However, a reduced leaves the operation of the sense ampli fier (SAs) vulnerable to bitline (BL) level offset and SA input offset. Thus, small- NVMs suffer from slow read speed or lo w read yield. In this study, we propose a new current-sampling-based SA (CSB-SA) to suppress the offset due to device mismatch, while maintaining tolerance for insuf ficient precha rge time. These features enable CSB-SA to achieve a re