Electronic circuit capable of carrying out a succession of divisions at a high speed without an objectionable error

摘要

The electronic circuit for dividing a dividend (RR) by a divisor (RD) calculates an eventual quotient (Q). An approximate reciprocal (RC) of the divisor is read out of a memory (34) and multiplied in a first multiplication circuit (36) by the divisor to obtain a correction factor (C₁). A second multiplication circuit (37) multiplies the dividend by the approximate reciprocal to calculate a first provisional quotient. This is processed by a first adder circuit (61) and a first partial divider (64₁). The first partial provisional quotient (P₁) is modified into the first partial quotient (Q₁) with reference to the second provisional quotient in a first correction circuit (66₁). Likewise, an i-th partial quotient (Q₁) is successively produced from an i-th correction circuit (66₁) by modifying an i-th partial provisional quotient (P_i) with reference to an (i + 1)-th provisional quotient. The first through the N-th partial quotients (Q₁, Q2....QN) are synchronously produced as the eventual quotient (Q) from a synchronization circuit (105). The electronic circuit is capable for carrying out a division at a high speed.