sentences:  Considering the 1 gate, during the ϕ1 clock high time (also known as the precharge time) the output C precharges up to V(ϕ1)−Vth, where Vth represents the threshold of the precharge transistor.During the next quarter clock cycle (the sample time), when ϕ1 is low and ϕ2 is high, C either stays high (if A or B are low) or C gets discharged low (if A and B are high).The A and B inputs must be stable throughout this sample time.