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