{HEAD ~ The first circuit} uses the clock signal received at {TAIL ~ the first input node} to control the frequency of the oscillator 
{ HEAD ~ The first circuit } uses the clock signal received at { TAIL ~ the first input node } to control the frequency of the oscillator
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH