To improve {HEAD ~ accuracy} of {TAIL ~ the measurements} where an analogue to digital converter is used the current signal, and optionally the supply voltage signal, is perturbed by a Quantisation Error Dispersion signal 
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To improve { HEAD ~ accuracy } of { TAIL ~ the measurements } where an analogue to digital converter is used the current signal , and optionally the supply voltage signal , is perturbed by a Quantisation Error Dispersion signal
OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL 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