1. ADPCM Adaptive Differential Pulse Code Modulation
Team M4
Andrew Akindele
Edward Shim
James Lee
Anthony Xu
Project Objectives
Stage 6
Simulations
Design and implement an Adaptive DPCM
Manager : Joe Bakker
Date
Feb. 24, 2003
Integrated Circuit Design Project

2. 18-525 Integrated Circuit Design Project
Project Status
Done
Cadence Schematic
Verilog Code
Gate Level Layout
Functional Block Layout (85%)
Functional Block Simulations (85%)
Next
CLA LVS
Component Corrections
Chip Wiring
Simulations and Verification
Integrated Circuit Design Project

3. 18-525 Integrated Circuit Design Project
Design Decisions
Macroblocks for adders and muxes
Helps as an intermediate step in LVS
Allows some wiring of close modules
Layout of CLA is taking a lot longer than expected, use RCA as backup
Integrated Circuit Design Project

4. Component Simulations
Fall
Rise
ROMindex
1.43ns
0.45ns
ROMstep
4.09ns
2.56ns
RCA 8bit
0.54ns
1.01ns
FSM
FGOOD = 250Mhz
Clamp_index
1.61ns
1.84ns
Register
FMAX=357Mhz FBAD=385Mhz
Integrated Circuit Design Project

5. Parasitics Used in Simulation
Estimated 1fF for each nmos + pmos pair that a line drives
Minimum sized inverter buffer for all inputs
Integrated Circuit Design Project

6. 18-525 Integrated Circuit Design Project
Rollercoaster Ride X
Integrated Circuit Design Project

7. 18-525 Integrated Circuit Design Project
FSM Good
Integrated Circuit Design Project

8. Clamp_index Critical Path
Integrated Circuit Design Project

9. 18-525 Integrated Circuit Design Project
Clamp_index Rise
Integrated Circuit Design Project

10. 18-525 Integrated Circuit Design Project
Clamp_index Fall
Integrated Circuit Design Project

11. 18-525 Integrated Circuit Design Project
ROMindex Fall
Integrated Circuit Design Project

12. 18-525 Integrated Circuit Design Project
ROMindex Rise
Integrated Circuit Design Project

13. 18-525 Integrated Circuit Design Project
ROMstep Fall
Integrated Circuit Design Project

14. 18-525 Integrated Circuit Design Project
ROMstep Rise
Integrated Circuit Design Project

15. 18-525 Integrated Circuit Design Project
RCA 8bit Fall
Integrated Circuit Design Project

16. 18-525 Integrated Circuit Design Project
RCA 8bit Rise
Integrated Circuit Design Project

17. 18-525 Integrated Circuit Design Project
Register Good
Integrated Circuit Design Project

18. 18-525 Integrated Circuit Design Project
Register Bad
Integrated Circuit Design Project

19. 18-525 Integrated Circuit Design Project
Questions?
Integrated Circuit Design Project