Spezielle Anwendungen des VLSI

1
Spezielle Anwendungen des VLSI Entwurfs
Applied VLSI design

• Course and contest
• Results of Phase 2
• Martin Kittel
• Sebastian Stieber

2
Results Phase 1

• Pezaris-Array-Multiplier
• Ripple-Carry-Adder
• No Pipelines

Mandatory values for FGPA Mandatory values for FGPA
Area A ( of pairs) 3203
Frequency f 63,12 MHz
Eavg 0.5155633
Metric 921,58 s
3
Improvements

• Multiplier
• Changed Operands (Metric 420.0)
• Replace 0.5-Coefficient-Multiplier with Shifter
  (Metric 241.5)
• Adder
• No Changes

4
Improvements

• Approximate results
• Error 0.2499477
• Metric 30.28
• New Multiplier
• Unique CSA-Tree for each Coefficient
• Metric 22.23

5
Advantages / Disadvantages

• Pro
• Should be smaller
• Should be faster
• Contra
• Complex routing

6
Improvements

• Pipelining
• 3 Stages
• Metric 13.36

Mandatory values for FGPA Mandatory values for FGPA
Area A ( of pairs) 1993
Frequency f 192,1 MHz
Eavg 0.2499477
Metric 13,36 s
7
Backannotated Design

• Timing Constraints 7.483 ns

Mandatory values for FGPA Mandatory values for FGPA
Area A ( of pairs) 1336
Frequency f 133,636 MHz
Eavg 0.2499477
Metric 8,63 s
8
ToDo

• Phase 3
• Mapping on ASIC

9
Thank you for your attention!