The non linear section is coupled in {TAIL ~ a feedback manner} with {HEAD ~ the quantized linear section} 
The non linear section is coupled in { TAIL ~ a feedback manner } with { HEAD ~ the quantized linear section }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD