December 2008
Intermediate to advanced
568 pages
16h 16m
English
Before we leap into the fray, let’s first perform a couple of simple thought experiments involving switches and light bulbs. Consider an electrical circuit consisting of a power supply, a light, and two switches connected in series, one after the other [Figure. 5.1(a)].

The switches are the inputs to the circuit and the light is the output. A truth table provides a convenient way to represent the operation of the circuit [Figure. 5.1(b)]. As the light is only on when both the a and b switches are
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