Optionally, difference signal E 246 is processed by digital filter 254, such as an infinite impulse response filter, to amplify, smooth, or otherwise manipulate difference signal E 246 to produce control signal 256 for adjusting the waveform shape in accordance with {TAIL ~ the method} described in {HEAD ~ Blankenship U.S} 
Optionally , difference signal E 246 is processed by digital filter 254 , such as an infinite impulse response filter , to amplify , smooth , or otherwise manipulate difference signal E 246 to produce control signal 256 for adjusting the waveform shape in accordance with { TAIL ~ the method } described in { HEAD ~ Blankenship U.S }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD