Electronic digital circuit for addition and subtraction - has shift register and four bit processing circuit operated by pulse generating control circuit for repeated operations

摘要

The electronic arithmetic processing circuit is used to perform both addition and subtraction of numbers in binary code. The processing circuitry is based upon a main circuit that has a shift register (25), two memory arrays and a four bit stage that can be switched between addition and subtraction. Alternatively, separate addition and subtraction circuits may be used. The processing arrangement can be used together with a pulse generating circuit that allows multiple additions and subtractions to be made. USE/ADVANTAGE - Simplifies process for repeated additions and subtractions.