A first circuit is coupled to {HEAD ~ the oscillator} and arranged for receiving {TAIL ~ an externally provided clock signal} at a first input node 
A first circuit is coupled to { HEAD ~ the oscillator } and arranged for receiving { TAIL ~ an externally provided clock signal } at a first input node
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH