{HEAD ~ The second synthesizer} synthesizes {TAIL ~ the second order intermodulation component} of the first sub path and the input signal of the second sub path to generate a synthesizing signal 
synthesizes
{ HEAD ~ The second synthesizer } synthesizes { TAIL ~ the second order intermodulation component } of the first sub path and the input signal of the second sub path to generate a synthesizing signal
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL 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 OTH