However, in the solid state circuit, {HEAD ~ the ratio} is sufficient to cause {TAIL ~ adequate second harmonic distortion} in each stage 
is sufficient to cause
However , in the solid state circuit , { HEAD ~ the ratio } is sufficient to cause { TAIL ~ adequate second harmonic distortion } in each stage
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH