A capacitor is coupled to the source of {TAIL ~ current} to receive {HEAD ~ current} therefrom, thereby forming an integrating circuit 
A capacitor is coupled to the source of { TAIL ~ current } to receive { HEAD ~ current } therefrom , thereby forming an integrating circuit
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH