Spezielle Anwendungen des VLSI Entwurfs Special applications of VLSI design

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Spezielle Anwendungen des VLSI Entwurfs
Special applications of VLSI design

• Course and contest
• Results of Phase 3
• Vladyslav Altman

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Design origin for phase 3

• Direct form II
• Ripple Carry Adder (temporary for measurement)
• Modified Baugh-Wooley multiplier with CSA
  Wallace-Tree
• Pipeline depth 8

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First ASIC results

• Constraints
• set frequency 1660
• set_max_leakage_power 10 nW

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Measurements
Operating conditions 1.2 V, standard Vt
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Measurements
Operating conditions 500 MHz, standard Vt
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Measurements
Operating conditions 500 MHz, 1.2 V
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Measurements

• Conclusion
• operate at lowest possible voltage with highest
  possible threshold voltage
• Synopsys Settings
• compile_ultra (the only one that makes some
  improvement)

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Measurements
Operating conditions 1.0 V, high Vt
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End Result

• Constraints
• set frequency 450
• set_max_leakage_power 10 nW

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Thank You!