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