{TAIL ~ Signal B} is inverted by inverter 326 and subsequently presented to {HEAD ~ the inhibit input} of one shot 312 and the s input of one shot 313 
{ TAIL ~ Signal B } is inverted by inverter 326 and subsequently presented to { HEAD ~ the inhibit input } of one shot 312 and the s input of one shot 313
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH