VLSI Interview Questions and Answers
Ques 11. What is the purpose of clock tree synthesis in VLSI design?
Clock tree synthesis is the process of designing a clock distribution network to ensure that the clock signal reaches all elements of a circuit with minimal skew and power consumption.
Ques 12. Explain the concept of metastability in digital circuits.
Metastability is a condition where a digital flip-flop is in an undefined state, often caused by asynchronous inputs arriving close to the clock edge. It can lead to unpredictable behavior in the circuit.
Ques 13. What are the key differences between RTL and gate-level design?
RTL (Register Transfer Level) design focuses on the flow of data between registers, while gate-level design involves the implementation of logic gates and flip-flops. RTL is more abstract and closer to the high-level design.
Ques 14. How does clock domain crossing impact VLSI design, and how can it be mitigated?
Clock domain crossing occurs when signals cross between different clock domains, leading to synchronization issues. Techniques like double flopping or using synchronizers are employed to mitigate the impact.
Ques 15. What is the significance of RTL simulation in VLSI design?
RTL simulation is crucial for verifying the functional correctness of a design before proceeding to the synthesis and implementation stages. It helps catch design errors early in the development process.
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