Adder Subtractor Circuit. It is one of the components of the alu arithmetic logic unit. To overcome the above limitation faced with half adders full adders are implemented.
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When m 1 the circuit is a subtractor and when m 0 the circuit becomes adder. Circuitlab provides online in browser tools for schematic capture and circuit simulation. It is also possible to construct a circuit that performs both addition and subtraction at the same time.
When m 0 b ex or of 0 produce b.
The operation being performed depends upon the binary value the control signal holds. When m 1 the circuit is a subtractor and when m 0 the circuit becomes adder. This is the circuit of an inverting amplifier and its output voltage is v 1 r r 2 v 1 2 v 1 similarly the output voltage v 02 due to v 2 alone is v 02 v 2 now the output voltage v 03 due to the input voltage signal v 3 alone applied at the input terminal can. It is a arithmetic combinational logic circuit designed to perform addition of two single bits.
