By taking current from or into the bit lines according to the previously stored information the voltage ratios are changed at {HEAD ~ the outputs} by which {TAIL ~ a data output driver} is controlled 
By taking current from or into the bit lines according to the previously stored information the voltage ratios are changed at { HEAD ~ the outputs } by which { TAIL ~ a data output driver } is controlled
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH