The pump up circuit may be configured to generate {TAIL ~ a pump} up signal in response to {HEAD ~ the data signal}, and the control signal 
The pump up circuit may be configured to generate { TAIL ~ a pump } up signal in response to { HEAD ~ the data signal } , and the control signal
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH