Post-manufacture compensation for a sensing offset can be provided, at
least in part, by selectively exposing one of a pair of cross-coupled
transistors in a sense amplifier to a bias voltage selected to cause a
compensating shift in a characteristic of the exposed transistor. In
designs susceptible to post-manufacture data dependent creep in a device
characteristic, such exposure may be advantageously provided in situ by
causing the sense amplifier to sense values purposefully skewed toward a
predominate value selected to cause the compensating shift. In some
realizations, an on-chip test block is employed to identify and
characterize sensing mismatch. Typically, the techniques described herein
may be employed to address sensing offsets that have developed
post-manufacture due to a data-dependent effect. However, in some
realizations, the techniques described herein may be used to address a
sensing offset arising at least in part from other or additional sources.