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ASO

 ASO Reduces Transient Noise in Complex CMOS Circuits Using Eldo Premier

Eldo Premier transient noise analysis feature achieves both accuracy and performance when simulating large scale analog/ mixed signal circuits for flicker noise effects.

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The Problem:

  • Inadequate circuit simulation capacity
  • Tradeoff between long simulation time and accuracy is critical issue
  • Debug the effects of flicker noise in transient domains
  • Impact of flicker noise on discretetime circuits could not be accurately simulated due to long simulation time required

The Solution: Fortunately, Eldo® Premier from Mentor Graphics® has a superb transient noise analysis feature (the .NOISETRAN command) that achieves both accuracy and performance when simulating large scale analog/mixed signal circuits for such effects. Eldo Premier simulation results demonstrate a high correlation with real silicon evaluation results.

The Results: Eldo Premier transient noise analysis feature achieves both accuracy and performance when simulating large scale analog/ mixed signal circuits for flicker noise effects:

  • Eldo Premier simulation results demonstrated a high correlation with real silicon evaluation results
  • Reduced flicker noise by 85 percent in the taped out design
  • Eldo Premier multi-thread technology increased performance and scalability without sacrificing accuracy
  • ASO anticipates even better performance when simulating future circuits with more elements

Related Resources

Challenges

  • Reduce turnaround time to meet tape out schedule and integrate multiple language blocks
  • Consolidate tools from an acquired company’s tool flow and integrate its IP into their design
  • Verify an AMS design with 14,000 MOSFET transistors and 56,000 nodes

Results

  • Achieved a 95 percent reduction in simulation time because they were able to run both behavioral and transistor blocks
  • Improved productivity for mixed-language, mixed-signal design
  • ADiT support for all major digital simulators and IP written in any standard design language
  • Mentor Graphics customer support critical to successful behavioral modeling effort
 
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