Cmos Or Gate Circuit Diagram. Another type of logic gate is the or gate. This schematic diagram shows the arrangement of four or gates within a standard 4071 cmos integrated circuit.
Both are controlled by the same input signal input a the upper transistor turning off and the lower transistor turning on when the input is high 1 and vice versa. Click the input switches or type the a b and c d bindkeys to control the two gates. 11 14 2004 cmos device structure doc 4 4 jim stiles the univ.
Let s look at the or gate s truth diagram.
The parallel connection of the two n channel transistors between gnd and the gate output ensures that the gate output is driven low logical 0 when either gate input a or b is high logical 1. If both of the a and b inputs are high then both the nmos transistors bottom half of the diagram will conduct neither of the pmos transistors top half will conduct and a conductive path will be established between the output and v ss ground bringing the output low. The ttl device is the 7432. This applet demonstrates the static two input nor and or gates in cmos technology.
