Circuit Timing Tradeoff Using Slack-Based Area and Power Thresholds

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Solution Overview

Problem

Existing EDA systems face challenges in optimizing resistor-transfer logic (RTL) synthesis by balancing improvements in power, timing, and area, often sacrificing one aspect to enhance another, leading to inefficient circuit design.

Innovation Solution

A timing-aware tradeoff model is employed to dynamically set thresholds for area and power sacrifice based on local timing information, prioritizing transforms that improve constrained timing areas while minimizing unnecessary area or power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If a transform is applied to improve timing of the circuit design, then timing is improved, but area or power consumption increases

Engineering Contradiction:
ImprovetimingVSAvoidarea
Core Design Contradiction:
Loss of timeVSArea of stationary object

Solution Approach 1:

The system applies transforms selectively to specific logic paths based on their timing characteristics. By analyzing local timing information and applying transforms only where needed rather than uniformly across the entire circuit, the system improves timing performance while minimizing unnecessary area consumption.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The system dynamically adjusts transform selection based on timing parameters such as slack values. By changing the parameters used to evaluate transforms (e.g., using timing-aware metrics instead of static criteria), the system optimizes the balance between timing improvement and area overhead.

Inventive Principle:
Principle #35Parameter changes

2Loss of time

If a transform is applied to improve timing of the circuit design, then timing is improved, but power consumption increases

Engineering Contradiction:
ImprovetimingVSAvoidpower consumption
Core Design Contradiction:
Loss of timeVSUse of energy by stationary object

Solution Approach 1:

The system evaluates transforms based on local timing information specific to each logic path and applies them only where timing improvement is needed. This selective application avoids unnecessary power consumption in regions of the circuit that do not require timing optimization.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The system applies transforms partially - only to the extent necessary to meet timing requirements. By avoiding excessive transformation of logic paths that already have adequate timing margins, the system prevents unnecessary power consumption while still achieving required timing performance.

Inventive Principle:
Principle #16Partial or excessive action

3Reliability

If multiple transforms are evaluated to optimize circuit design, then design quality is improved, but system complexity increases

Engineering Contradiction:
Improvedesign qualityVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The system segments the circuit design into individual logic paths and evaluates transforms for each path separately based on its specific timing characteristics. This segmentation allows the system to manage complexity by handling smaller, localized decisions rather than evaluating all possible transforms across the entire circuit simultaneously.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system performs preliminary analysis of timing information for each logic path before evaluating transforms. By pre-processing and organizing timing data, the system simplifies the subsequent transform evaluation process and reduces the computational complexity of selecting optimal transforms.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS12481811B1Circuit design modification based on timing tradeoff
Publication Date: 2025.11.25 CADENCE DESIGN SYST INC
  • US12481811B1 patent drawing
  • US12481811B1 patent drawing
  • US12481811B1 patent drawing

AI summary

Various embodiments provide for modifying a circuit design based on timing tradeoff, which can be part of an electronic design automation (EDA) system. For instance, some embodiments use a return on investment (ROI) concept to determine one or more thresholds for how much area or power of a circuit design should be available for use (e.g., sacrificed) in order to obtain an improvement in slack by a given transformation.