must be selected which in this case is block 34 i 34 the block select line bs i the odd select line os i and the word line wl1 are all pulled high in order activate the related transistors b0 c11 and o1 even select line es i is pulled low to deactivate the even select transistor e1 bit line bl0 is connected to vss bit line bl1 to a sense amplifier not shown and bit line bl2 to vbl the current from the sense amplifier flows through block select transistor b1 cell c11 and then odd bit select transistor o1 to vss the buried n diffusion lines n00 and n01 are both connected to bit line bl0 through transistors b0 and o1 respectively thus the cell c10 has no effect since its drain and source are at the same voltage level bit line bl2 is connected to vbl which has the same voltage as the sense amplifier at bl1 the buried diffusion lines n10 and n11 are connected to bit line bl1 through transistors b1 and o2 respectively thus cell c12 has no effect since its drain and source are at the same voltage level buried diffusion bit line n20 is connected to vbl through transistor b2 as the voltage level at buried diffusion bit line n11 is connected.