In an IC implementing synchronous logic, a clock tree distributes a clock signal to {HEAD ~ many devices} within an IC such as registers, {TAIL ~ latches} and flip flops that are clocked by the clock signal 
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In an IC implementing synchronous logic , a clock tree distributes a clock signal to { HEAD ~ many devices } within an IC such as registers , { TAIL ~ latches } and flip flops that are clocked by the clock signal
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH