Tutorials:Cadence:ExampleLayouts

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Example Layouts

Inverter

Shown below are several alternative ways to layout an inverter:

Layout 1
Tutorials-Cadence-ExLayout-Inv-001.png
Area = 7.80um x 10.80um = 84.24um2


Layout 2
Tutorials-Cadence-ExLayout-Inv-003.png
Area = 7.80um x 13.20um = 102.96um2


Layout 3
Tutorials-Cadence-ExLayout-Inv-004.png
Area = 7.80um x 10.80um = 84.24um2


Layout 4
Tutorials-Cadence-ExLayout-Inv-005.png
Area = 7.20um x 16.20um = 116.64um2

This inverter layout is designed to abut to form a ring oscillator. Notice the Metal 2 trace above the IN/OUT. This provides the return path from the output of the last inverter to the input of the first inverter in the ring oscillator.



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