A Process Variation Tolerant Self-Compensating Sense Amplifier Design

Lithography related CD variations, fluctuations in dopant density, oxide thickness and parametric variations of devices are identified as major challenges in ITRS. Due to growth in size of embedded SRAMs as well as usage of sense amplifier based signaling techniques, process variation in sense amplifiers lead to significant loss of yield. In this paper, we present a process variation tolerant self-compensating sense amplifier design, using an active compensation circuitry. Results from statistical simulation in a 32nm process show that the proposed active compensation is highly effective in restoring yield at a level comparable to that of sense amplifiers without significant process variations.