in step , after the pulse is made to rise, counting a number of {TAIL ~ pulses} of the remaining one of the first clock signal and {HEAD ~ the clock signal} generated in step , 
in step , after the pulse is made to rise , counting a number of { TAIL ~ pulses } of the remaining one of the first clock signal and { HEAD ~ the clock signal } generated in step ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH