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