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Published byTamsyn Shelton Modified over 6 years ago
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MOS TRANSISTOR (Remind the basics, emphasize the velocity saturation effects and parasitics)
Structure of a NMOS transistor
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Symbols for a PMOS transistor:
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CMOS circuits contain both; the NMOS and PMOS transisrors
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Parameters of the most basic model of a MOS transistor
the threshold voltage of the transistor, the mobility of electrons (or holes), the gate capacitance per unit area, the aspect ratio of the transistor, the gate-length modulation coefficient,
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The threshold voltage
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Voltage-current relations of a MOS transistor (Based on realistic inversion channel profile)
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↑
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~
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Summary: G S D
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~
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Model parameters and secondary effects
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↑
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Oxide thickness vs minimum featura size (nm)
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Parasitic components of MOS transistors
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xj W X
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metal (S terminal) poly - Si gate source diffusion RSe RSi
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