Patent ID: 8154936

Claim:
A system comprising a storage subsystem, said storage subsystem, comprising: a first set of storage cells for storing data; a second set of storage cells for storing data; a first set of reference storage cells with a discharge rate lower than the discharge rate of said first set and second set of storage cells; a second set of reference storage cells with a discharge rate lower than the discharge rate of said first set and second set of storage cells; and a differential sensing block (DSB); the arrangement being such that when data is required to be read from said first set of storage cells, the output of said first set of storage cells is coupled to one input of said DSB and the output of said second set of reference storage cells is coupled to the other input of said DSB, and when data is required to be read from said second set of storage cells, the output of said second set of storage cells is coupled to one input of said DSB while the output of said first set of reference storage cells is coupled to the other input of said DSB.