Double input logic gates

We could work our way systematically through all 16 of the double-input logic gates, except that space restrictions on this article will stop us well short of that objective. Instead, we will consider six types frequently encountered in the computer literature. 

Fig. 2 Truth tables and physical electronic representations of six of the 16 double-input logic gates AND, OR. NOR. NAND, INHIBIT, and XOR, [View this art in color at www.dekker.com.)...

Figure 1 Truth tables for single-input YES, NOT, and PASS 1 logic gates and for double-input AND, OR, and NOR logic gates. The NOT OR function of the NOR gate can be noted by referring to the truth tables for NOT and OR logic.

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