a digital to analog {HEAD ~ converter} that converts the digital output signal into {TAIL ~ an analog output signal}, wherein 
a digital to analog { HEAD ~ converter } that converts the digital output signal into { TAIL ~ an analog output signal } , wherein
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH