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