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Tape Out

Post LayoutSimulation

Extraction

Pre−Layout Simulation

Circuit

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Satisfied? ConstraintsTiming

YES

NO

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0 50 100 150 200 250 3000

0.1

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0.3

0.4

0.5

0.6

0.7

0.8

Resistance (kilo ohms)

Del

ay (

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05

1015

2025

30

0

0.2

0.4

0.6

0.80

20

40

60

80

100

120

140

160

Resistance (× 10k Ω)

Load Capacitance (pF)

Del

ay (×

0.0

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low power design of standard cell digital vlsi circuits

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