ALTERABLE-LATENT IMAGE MONOLITHIC MEMORY

摘要

A monolithic latent image memory is one having a plurality of bistable memory cells. Selected bistable memory cells include AC impedance means which are responsive at the transition from non-sustaining voltage level to an operating level so as to set the selected memory cells to a first predetermined state and thus provide a monolithic memory which is capable of functioning in a read-only and a read-write mode. The read-only state is selectively alterable by employing an AC impedance means which is multi-valued.