2 Input Nand Gate Diagram. In digital electronics a nand gate is a logic gate which produces an output which is false only if all its inputs are true. See the image below.
Thus its output is complement to that of an and gate. A a and b both low. The output of the first nand is the second input to the other two.
Connect two not using nands at the inputs of a nand to get or logic.
Thus its output is complement to that of an and gate. Either transistor must be cut off off for an output at q. As you can see the x output is 0 only when all inputs are 1. The enable signal could be a pulse from the manual clock circuit explained previously.