| 摘要 |
Binary arithmetic member for adding and subtracting binary numbers, in which the input register and the accumulator have connected between them a control-device comprising a sensing circuit for sensing the least significant bit place, where the binary number to be added or subtracted has a bit value "1," whose outputs corresponding to the respective bit places of the binary number are connected to the corresponding inputs of the accumulator so that under the control of a starting pulse that bistable flip-flop of the accumulator changes its state which ordinally corresponds to said least significant bit place where the binary number to be added or subtracted has a bit value "1," said control-device comprising furthermore a gate circuit which, together with the sensing circuit, satisfies a given logical equation, so that a simple arithmetic member is obtained. A special device is provided for adding to or subtracting from the result in the accumulator an additional binary number 1 when the accumulator passes the zero position (FIGS. 2, 2a, 2b, 2c, 2d).
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