In the above figure, is the signal used to precharge the and lines before every read operation. The transistor labelled EQ is the equalization transistor to ensure equal voltages on and lines after precharge. SE is the sense enable signal used to sense the voltage difference between the and lines.
As mentioned earlier, the access time of the memory mainly depends on the performance of the sense amplifier. In contrast with the simple sense amplifier shown earlier, Figure 30.42 shows an amplifier which is somewhat complicated to improve the performance.
is the signal used to precharge the 
and 
lines before every read operation. The transistor labelled EQ is the equalization transistor to ensure equal voltages on 
