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Verilog® HDL: A Guide to Digital Design and Synthesis, Second Edition by Samir Palnitkar

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Chapter 15. Advanced Verification Techniques

Verilog HDL was traditionally used both as a simulation modeling language and as a hardware description language. Verilog HDL was heavily used in verification and simulation for testbenches, test environments, simulation models, and architectural models. This approach worked well for smaller designs and simpler test environments.

As the average gate count for designs began to approach or exceed one million, verification soon became the main bottleneck in the design process. Design teams started spending 50-70% of their time in verifying designs rather than creating new ones.

Designers quickly realized that to verify complex designs, they needed to use tools that contained enhanced verification capabilities. ...

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