Electronic circuit capable of accurately carrying out a successi

Details Electronic circuit capable of accurately carrying out a successi Electronic circuit capable of accurately carrying out a successi

1985-02-07

1988-02-16

Malzahn, David H.

Boots, shoes, and leggings

G06F 752

Patent

active

047259744

ABSTRACT:
In an electronic circuit for dividing a dividend (RR) by a divisor (RD) to calculate an eventual quotient (Q) divisible into first through N-th partial quotients, each being represented by a g-ary number, 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 (C.sub.1). A second multiplication circuit (37) multiplies the dividend by the approximate reciprocal to calculate a first provisional quotient which is near to the eventual quotient and which is processed into a first partial provisional quotient (P.sub.1) and a second provisional quotient by a first adder circuit (61) and a second partial divider (64.sub.1), respectively. The first partial provisional quotient is modified into the first partial quotient Q.sub.1 with reference to the second provisional quotient in a first correction circuit (66.sub.1). Likewise, an i-th partial quotient (Q.sub.1) except the first partial quotient is successively produced from an i-th correction circuit (66.sub.i) by modifying an i-th partial provisional quotient (P.sub.i) with reference to an (i+1)-th provisional quotient. Thus, the first through the N-th partial quotients successively appear from the first through the N-th correction circuits and are synchronously produced as the eventual quotient from a synchronization circuit (105).

REFERENCES:
patent: 3828175 (1974-08-01), Amdahl et al.
patent: 4488247 (1984-12-01), Inagami et al.
patent: 4603397 (1986-07-01), Ohtsuki et al.
Singh, "High Speed Array-Assisted Binary-Decimal Divider", IBM Tech. Disclosure Bulletin, vol. 20, No. 3, Aug. 1977, pp. 1038-1040.

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