12. Intorduction
Switch-level modeling is the lowest level of hardware abstraction in Verilog, providing a transistor-level view of digital circuits. This modeling style uses MOS (Metal-Oxide-Semiconductor) transistor primitives to describe circuits, offering detailed understanding of CMOS (Complementary MOS) design.
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Why Switch-Level Modeling?
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Understanding CMOS: Learn how logic gates are actually built
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Low-Power Design: Analyze power consumption at transistor level
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Analog Behavior: Model charge sharing, leakage, and analog effects
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Custom Design: Create optimized circuits for specific applications
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Physical Insight: Bridge the gap between digital and analog design
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Real-World Applications:
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Custom ASIC cell design
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Low-power circuit optimization
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Memory circuit design (SRAM, DRAM)
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Analog/Mixed-signal interfaces
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I/O pad design
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Refer below links for deep diving into Switch Level Modeling:
12.1. Understanding MOS Transistors
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12.2. Switch Level Primitives
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12.3. Drive Strength and Resolution
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12.4. Practical CMOS Circuits
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12.5. Advanced Examples