These multiplication and summation operations are very easy to implement precisely and quickly in {HEAD ~ digital form} using {TAIL ~ a simple microprocessor}, whereas analog multipliers are notoriously non linear and unstable 
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These multiplication and summation operations are very easy to implement precisely and quickly in { HEAD ~ digital form } using { TAIL ~ a simple microprocessor } , whereas analog multipliers are notoriously non linear and unstable
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH