####################################### Basics of Digital Systems - Other Gates ####################################### There are other logic gates that are made from the 3 basic gates. Their functions are commonly used and that is why they are represented as gates. NAND Gate ========= It is the negated function of the AND gate. Truth table === === ============= a b c = a NAND b === === ============= 0 0 1 0 1 1 1 0 1 1 1 0 === === ============= NAND Gate .. image:: https://raw.githubusercontent.com/victorhkr/Documentation_test/master/2000px-Nand-gate-en.png :height: 100px :width: 200 px :align: left | | | | | NOR Gate ======== It is the negated function of the OR gate. Truth table === === ============ a b c = a NOR b === === ============ 0 0 1 0 1 0 1 0 0 1 1 0 === === ============ NOR Gate .. image:: https://raw.githubusercontent.com/victorhkr/Documentation_test/master/1200px-NOR_ANSI_Labelled.svg.png :height: 100px :width: 200 px :align: left | | | | | XOR Gate ======== If a and b are different the result is 1, otherwise 0. === === ============ a b c = a XOR b === === ============ 0 0 0 0 1 1 1 0 1 1 1 0 === === ============ XOR Gate .. image:: https://raw.githubusercontent.com/victorhkr/Documentation_test/master/Xor-gate-en.svg.png :height: 100px :width: 200 px :align: left | | | | | XNOR Gate ========= If a and b are different the result is 0, otherwise 1. === === ============ a b c = a XNOR b === === ============ 0 0 1 0 1 0 1 0 0 1 1 1 === === ============ XNOR Gate .. image:: https://raw.githubusercontent.com/victorhkr/Documentation_test/master/2000px-Xnor-gate-en.svg.png :height: 100px :width: 200 px :align: left