A circuit produces an output binary floating point number approximating with high accuracy the inverse of an input binary floating point number D in accordance with the expression (1/D).apprxeq.[(1/A)-C]+[C-(B/A.sup.2)], where the number A is a low accuracy approximation of D, and B is substantially...http://www.google.de/patents/US4823301?utm_source=gb-gplus-sharePatent US4823301 - Method and circuit for computing reciprocals
