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Overview
Mixed-signal simulators for architectural design improve
collaboration, reuse, and the verification schedule
Standards or models can improve verification and
validation collaboration and reuse
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Who Legerity is and What We Do
Carrier Telephony
• High voltage mixed-signal telephone
drivers for central offices, local
neighborhood boxes, and analog PBXs
Consumer Telephony
• Voice-enabled cable modems, voice-
enabled DSL modems, analog terminal
adapters
• Phone ready PCs
• Voice over wireless LAN
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Very Little Test Case Sharing – As Expensive As
Design
PRODUCT TEST
HARDWARE VALIDATION
VERIFICATION
Digital Analog
MechanicalSoftware
SYSTEM ARCHITECTURE SYSTEM TEST CASES
DESIGN TEST CASES
VERIFICATION TEST CASES
RANDOM TESTCASE GEN
VALIDATION TEST CASES
PRODUCTION TEST CASES
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Virtual Lab Or Standard Devices/Languages May
Provide Solution
Hardware vendors provide simulation models of their devices
Define a standard set of devices and behavior
A standard mixed-signal verification assertion language can be defined
Bonus: Common environment allows common GUI between laboratory and
simulation (e.g. LabView)
Question: Do similar issues arise in signal processing and mechanical designs?
S D
SD
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D L T
P R O LIAN T
8000
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Summary
Problems
• Collaboration between architecture and implementation
• Delayed verification
• Little test case, test bench, or RTG infrastructure reuse
Solutions
• Common design and modeling simulation tools
• Virtual lab or language standards