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dff.sv
CodeWaveform
1// D Flip-Flop — synchronous reset
2module dff #(parameter int W=1) (
3 input logic clk, rst_n,
4 input logic [W-1:0] d,
5 output logic [W-1:0] q
6);
7 always_ff @(posedge clk)
8 if (!rst_n) q <= '0;
9 else q <= d;
10endmodule
Signal Waveform
5 / 5 test cases passedAccepted ✓
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Common Questions

VLSI Engineering — Answered

Everything you need to know about learning and practising VLSI design.

What is VLSI design and why is it important?
VLSI (Very Large Scale Integration) design is the process of building integrated circuits with millions to billions of transistors. It powers every modern computing device and is implemented using HDLs like Verilog and SystemVerilog.
What is the difference between Verilog and SystemVerilog?
Verilog is the foundational RTL hardware description language. SystemVerilog is a superset adding verification constructs: interfaces, assertions and coverage. Most modern teams use SystemVerilog for both design and verification.
What is Static Timing Analysis (STA)?
STA verifies that a digital circuit meets timing requirements without full simulation. It checks setup/hold times and clock domain crossings. Synopsys PrimeTime and Cadence Tempus are the dominant industry tools.
How do I prepare for VLSI interviews at Intel or Qualcomm?
VLSI interviews cover RTL design (FSMs, FIFOs, pipelines), verification, timing and sometimes physical design. VLSI Forge offers auto-graded problems modelled on real interview questions from top semiconductor companies.
What is UVM and when should I learn it?
UVM is a standardised SystemVerilog framework for reusable verification environments — agents, sequencers, monitors, scoreboards. Learn it after mastering basic SystemVerilog testbenches. Required at Qualcomm, Intel and Arm.
What is Physical Design in VLSI?
Physical Design converts a synthesised netlist into a fabrication-ready layout through floorplanning, placement, clock tree synthesis, routing and sign-off. Key tools: Cadence Innovus and Synopsys IC Compiler.
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