Finally, FIG 7 shows {HEAD ~ a schematic} for adding {TAIL ~ the present invention} to an existing power supply 
for adding
Finally , FIG 7 shows { HEAD ~ a schematic } for adding { TAIL ~ the present invention } to an existing power supply
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH