A mixed matrix membrane is provided which comprises a continuous phase organic polymer and small pore molecular sieves dispersed therein. The method of the preferred embodiment can further include combining the first portion of the digital signature and the second portion of the digital signature; and delivering the digital signature to the first user device. Under the present invention, some sense amplifiers from either banks of sense amplifiers are repositioned to the area between the two adjacent memory sub-arrays thereby permitting the repositioned sense amplifiers to be shared.