COMPUTER SCIENCE AND ENGINEERING
DIGITAL LOGIC
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
combinational circuit
|
|
|
sequential circuit
|
|
|
complex circuit
|
|
|
gate
|
Detailed explanation-1: -Decoder is a combinational circuit that has ‘n’ input lines and maximum of 2n output lines. One of these outputs will be active High based on the combination of inputs present, when the decoder is enabled. That means decoder detects a particular code.
Detailed explanation-2: -A decoder is a combinational circuit. It has n input and to a maximum m = 2n outputs.
Detailed explanation-3: -An encoder with enable pins is called multiplexer while a decoder with enable pins is called demultiplexer.
Detailed explanation-4: -In a digital system, the logic circuits can be divided into two classes: combinational and sequential. A combinational circuit uses logic gates only; a sequential circuit uses flip-flops (ffs) and logic gates. The discussion of ffs is left to the next chapter. Most of the flip-flops are synchronous.
Detailed explanation-5: -An Encoder is a combinational circuit that performs the reverse operation of Decoder. It has maximum of 2n input lines and ‘n’ output lines. It will produce a binary code equivalent to the input, which is active High.