Analog Digital VLSI Design MOS capacitances

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Analog Digital VLSI Design MOS capacitances
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MOS CAPACITANCES
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MOS CAPACITANCES
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Dynamic Behavior of MOS Transistor
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The Gate Capacitance
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• Voltage dependent capacitances--- dynamic gate
  capacitance, junction capacitances.
• Voltage independent capacitances. overlap
  capacitances CGDOV CGSOV

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MOSFET CAPACITANCES
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Average Gate Capacitance
Different distributions of gate capacitance for
varying
operating conditions
Most important regions in digital design
saturation and cut-off
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Junction Capacitances -gt Cdb, Csb
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Junction Capacitance
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Linearizing the Junction Capacitance
Replace non-linear capacitance by large-signal
equivalent linear capacitance which displaces
equal charge over voltage swing of interest
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EQUIVALENT LARGE SIGNAL AREA CAPACTIANCE
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Junction Capacitance
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