A. Multiplexers
B. Sequential logic circuits e.g.: counters
C. Combinational logic circuits e.g.: adder
D. ALU (Arithmetic Logic Unit)
Choose the correct answer from the options given below:
Digital Logic Building Blocks Complexity
The question asks to arrange specific digital logic building blocks in order of increasing complexity.
Complexity Analysis
- Combinational Logic Circuits (C): These circuits produce outputs based solely on the current combination of inputs. Examples like adders are relatively simple, built directly from logic gates.
- Multiplexers (A): Also combinational, multiplexers select one of several input signals and forward it to a single output. They are generally more complex than basic adders but simpler than circuits with memory.
- Sequential Logic Circuits (B): These circuits include memory elements (like flip-flops), meaning their outputs depend not only on current inputs but also on the stored state (past inputs). Counters are a prime example, requiring state storage.
- ALU (Arithmetic Logic Unit) (D): An ALU performs arithmetic (e.g., addition, subtraction) and logical operations (e.g., AND, OR). It integrates multiple functional units and control logic, making it significantly more complex than the other listed blocks.
Ordering by Complexity
Based on the analysis, the order of increasing complexity is:
- Combinational Logic Circuits (C): Simplest, output depends only on current inputs.
- Multiplexers (A): Combinational, but slightly more complex structure than basic gates/adders.
- Sequential Logic Circuits (B): Requires memory elements (state), adding complexity over combinational circuits.
- ALU (D): Integrates multiple complex operations, making it the most complex.
Final Sequence
The correct order of increasing complexity is C, A, B, D.
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Choose the correct answer from the options given below:
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