COMPUTER SCIENCE AND ENGINEERING
DIGITAL LOGIC
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Detailed explanation-1: -Common practical digital signals are represented as 8-bit (256 levels), 16-bit (65, 536 levels), 24-bit (16.8 million levels), and 32-bit (4.3 billion levels) using pulse-code modulation where the number of quantization levels is not necessarily limited to powers of two.
Detailed explanation-2: -Digital signals and objects deal in the realm of the discrete or finite, meaning there is a limited set of values they can be. That could mean just two total possible values, 255, 4, 294, 967, 296, or anything as long as it’s not ∞ (infinity).
Detailed explanation-3: -The definition of “signal level” of a digital signal is the level, expressed in dBmV, at which a sine wave would produce the same heating in a resistor as does the signal being measured.
Detailed explanation-4: -In most digital circuits, the signal can have two possible valid values; this is called a binary signal or logic signal. They are represented by two voltage bands: one near a reference value (typically termed as ground or zero volts), and the other a value near the supply voltage.