Half Adder Circuit And Truth Table

A Half Adder is defined as a basic four terminal digital device which adds two binary input bits. It outputs the sum binary bit and a carry binary bit. As we have defined above, a half adder is a simple digital circuit used to digitally add two binary bits. A binary bit is either 0 … Read more

Binary Adder Half and Full Adder

Binary adder is one of the basic combinational logic circuits. The outputs of a combinational logic circuit depend on the present input only. In other words, outputs of combinational logic circuit do not depend upon any previously applied inputs. It does not require any memory like component. Binary adder is one of the basic combinational … Read more

Look Ahead Carry Adder

We have seen that the parallel adder circuit built using a cascaded arrangement of full adders is highly affected by the delay associated with the propagation of carry bits (more on this in the article “Parallel Adder”). Greater the number of bits needed to be added, greater is the delay associated. If we need to … Read more

Parallel Adder or Subtractor

We have seen parallel adder circuit built using a cascaded combination of full adders in the article Parallel Adder. Likewise in the article on Parallel Subtractor we have seen two different ways in which an n bit parallel subtractor can be designed. However always from the point of optimization, we prefer using a single circuit … Read more

Parallel Adder

Adders are the combinatorial circuits which are used to add two binary numbers. The nature of the adders chosen depends on the characteristics of the binary numbers which need to be added. Say for example, if one needs to add two single bit binary digits, then one can use half adder while if there is … Read more