Binary multiplier circuit converting decimal numbers directly - adds binary coded partial products before conversion to 8421 code

摘要

An electronic multiplier circuit forms the product by adding binary coded partial products. The multiplicands and the multiplier are converted into binary code using a fixed value circuit which converts the decimal numbers of the multiplicands and multiplier from 1-to-10 code directly into binary code. The fixed value circuit (1) has a dedicated drive line for each value of 1 to 9 of the decimal numbers. A first serial adder circuit (30) contains three accumulator-shift registers (6-8). USE/ADVANTAGE - Electronic multiplier circuit performs direct conversion into binary code then converts to 8421 code.