How to evaluate performance of a digital circuit gate

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How to evaluate performance of a digital circuit (gate, block, …)? Cost Reliability Scalability Speed (delay, operating frequency) Power dissipation Energy to perform a function 2011/2/24 40
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Cost of Integrated Circuits NRE (non-recurrent engineering) costs design time and effort, mask generation one-time cost factor Recurrent costs silicon processing, packaging, test proportional to volume proportional to chip area 2011/2/24 41
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NRE Cost is Increasing 2011/2/24 42
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Die Cost 2011/2/24 43 Wafer From Going up to 12” (30cm) Single die
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Design Economics Non-recurring engineering costs(NREs) Recurring costs Fixed costs 44 S total = C total (1 - m ) C total is the manufacturing cost of a single IC to the vendor M is the desired profit margin
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Non-recurring engineering costs Spent once during the design of integrated circuit F total Engineering design cost E total Prototype manufacturing cost P total The NRE costs can be amortized over the lifetime volume of the chips 45
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Non-recurring engineering costs Spent once during the design of integrated circuit F total F total = E total + P total Engineering design cost E total Prototype manufacturing cost P total The NRE costs can be amortized over the lifetime volume of the chips 46
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Non-recurring engineering costs Spent once during the design of integrated circuit F total Engineering design cost E total The cost of designing the IC E total hopefully will happen once during the chip design process Personnel cost Architectural design Logic capture Simulation for functionality Layout of modules and chip Timing verification DRC and tapout procedures Test generation 47
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Non-recurring engineering costs Spent once during the design of integrated circuit F total Engineering design cost E total The cost of designing the IC E total hopefully will happen once during the chip design process Support costs Computer costs CAD software costs Education or re-education costs 48
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Non-recurring engineering costs Spent once during the design of integrated circuit F total Engineering design cost E total The cost of designing the IC E total hopefully will happen once during the chip design process Costs reference(2010) Salary $50-$100K Overhead $10-$30K Computer costs $2K CAD software costs Digital $10K Analog $100K Back end $1M 49
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Non-recurring engineering costs Spent once during the design of integrated circuit F total F total = E total + P total Engineering design cost E total Prototype manufacturing cost P total The mask costs($500K-$1M for 130nm process) Test fixture costs($1K-$50K) Package tooling MPW is an economical way of prototype(MOSIS) 50
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An example of NRE You are starting a company to commercialize your brilliant research idea. Estimate the cost to prototype a mixed-signal chip. Assume you have 7 digital designers.
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