Capacitor CF and {HEAD ~ inductor LF} provides filtering of these pulses of current IL to produce {TAIL ~ a more steady flow} of current through resistor RL 
Capacitor CF and { HEAD ~ inductor LF } provides filtering of these pulses of current IL to produce { TAIL ~ a more steady flow } of current through resistor RL
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH