Full Adder
A full adder accepts two input bits and an input carry and generates a sum and a carry, in its output. The logic symbol of a full adder is, Truth table of a full adder is given below, A B Cin ∑ Cout 0 0 0 0 0 0 0 1 1 0 0 1 …
Half Subtractor
Half subtractor is a combinational circuit that performs subtraction of two bits. It accepts two binary digits as input and produces two binary digits, a difference and a borrow, in its output. The logic symbol of half subtractor is given below. Expressions for Difference and Borrow can be derived from the following truth table and …
Half Adder
Recall laws of binary addition, 0 + 0 = 00 + 1 = 11 + 0 = 11 + 1 = 10 Half adder is a logical circuit that is used to perform this operation. It accepts two binary digits as input and produces two binary digits, a sum and a carry, in its output. …
Universal gates (NAND and NOR gate)
The NAND and NOR gates are called universal gates. That is universal gates can be used in combination to perform the AND, OR and inverter operations. NAND The term NAND implies the function of an AND gate with an inverted output. The logic symbol of NAND gate is equivalent to an AND gate followed by …
Basic Logic Gates (NOT, AND, OR, XOR and X-NOR)
Logic tells you a certain proposition is true if several conditions are true. Logic is applied in a digital circuit to implement logic functions. Circuits that performs logic operations specified are called logic gates. There are three basic logic operations NOT AND OR These are indicated by following shape symbols The lines connected to the …