Similarly to the turned on first forward direction switching element Tr F1, the control switching element Tr C is also turned on by {HEAD ~ the start pulse Vst} in {TAIL ~ the initial interval Ts}, so that the discharging voltage Vss is applied to the first reset node QB1 
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Similarly to the turned on first forward direction switching element Tr F1 , the control switching element Tr C is also turned on by { HEAD ~ the start pulse Vst } in { TAIL ~ the initial interval Ts } , so that the discharging voltage Vss is applied to the first reset node QB1
OTH OTH OTH 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 HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH