Electronic computation circuit for addition and subtraction - contains two input shift registers with crossover feedback, tetrad addition and subtraction stages, reset circuit

摘要

The electronic computation circuit forms its numerical results serially. It contains two input shift registers (1,2) with crossover feedback, a tetrad addition stage (4) and a tetrad subtraction stage (5). For further processing of a previous result as the first summand or minuend the result is transferred by clock transfer from one shift register into the other. One stage of te circuit (17) produces one or two additional high pulses after performing its single or double operation. These pulses are used to reset flip-flops and a pulse counter stage. USE/ADVANTAGE - Is suitable only for addition and subtraction. Is improved, including control mechanism, compared to earlier version.