ECT 2440 Chapter Notes - Chapter 7: Leading Edge, Gray Code, Parallel Communication
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Positive versus negative logic: usually, the higher amplitude in a binary system represents 1 and the lower-amplitude range represents 0. Logic 0 is also called low, false, or off: signals in logic systems switch between high and low as the information being represented changes. We denote these signals, or logic variables, by uppercase letters such as a, b, and c. Digital words: to represent more information, we resort to using groups of logic variables called digital words, a byte is a word consisting of eight bits, and a nibble is a four-bit word. 7. 2 representation of numerical data in binary form. Because digital circuits are (almost always) designed to operate with only two symbols, 0 or 1, it is necessary to represent numerical and other data as words composed of 0s and 1s. To convert a decimal integer to binary, we repeatedly divide by two until the quotient is zero.
