{HEAD ~ Each pipeline} includes a sample and hold {TAIL ~ circuit} that samples the programming voltage when the pipeline begins a write operation 
hold
{ HEAD ~ Each pipeline } includes a sample and hold { TAIL ~ circuit } that samples the programming voltage when the pipeline begins a write operation
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH