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