Each of the capacitors is formed of {HEAD ~ a series circuit} of two substantially equal size individual capacitors forming {TAIL ~ a capacitor pair} 
Each of the capacitors is formed of { HEAD ~ a series circuit } of two substantially equal size individual capacitors forming { TAIL ~ a capacitor pair }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL