To understand these considerations, it is important to remember that the circuit of FIG 2 is being provided as {TAIL ~ an improved substitute} for {HEAD ~ the circuit} of FIG 1 
To understand these considerations , it is important to remember that the circuit of FIG 2 is being provided as { TAIL ~ an improved substitute } for { HEAD ~ the circuit } of FIG 1
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH