{HEAD ~ a control voltage source} with {TAIL ~ a phase output} and a neutral output for supplying control voltage to said moment defining circuit and said level changing circuit 
with
{ HEAD ~ a control voltage source } with { TAIL ~ a phase output } and a neutral output for supplying control voltage to said moment defining circuit and said level changing circuit
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH