Adaptive IC Tuning With Error Prediction for Lower Power
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Solution Overview
Problem
Integrated circuits often consume excessive power due to conservative design approaches that account for rare worst-case variability scenarios, leading to inefficient power usage.
Innovation Solution
The implementation of a method and apparatus that includes a monitored path with circuit elements, a transition detection module, and an error prediction module within an integrated circuit, allowing for adaptive tuning of voltage or frequency to minimize power consumption while ensuring proper operation by detecting potential errors and adjusting parameters before failures occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conservative supply voltage is selected to ensure correct operation under all possible variations, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic voltage and frequency scaling by monitoring actual circuit operation in real-time. The system transitions from static conservative voltage selection to dynamic adjustment based on actual performance, allowing voltage to be lowered when margins are sufficient and raised when approaching error thresholds, thus resolving the contradiction between reliability and power consumption
Solution Approach 2:
The patent employs feedback mechanisms through error detection modules that continuously monitor circuit operation and provide information about actual performance margins. This feedback enables the system to adjust voltage and frequency settings based on real-time conditions, optimizing the balance between reliability and power consumption rather than relying on pre-determined conservative settings
2Reliability
If conservative design margins are added to account for uncertainty in circuit models, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent enables the circuit to self-monitor and self-adjust its operating parameters. Error detection modules automatically assess actual performance margins and trigger voltage or frequency adjustments without external intervention, allowing the system to maintain reliability through self-regulation rather than requiring complex pre-designed margins
3Use of energy by moving object
If voltage or frequency is reduced to minimize power consumption, then power efficiency is improved, but reliability deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of voltage and frequency based on real-time monitoring of circuit performance. The system can operate at lower voltages/frequencies when margins are sufficient (improving power efficiency) and automatically increase them when approaching error thresholds (maintaining reliability), thus dynamically resolving the contradiction between power efficiency and reliability
Solution Approach 2:
The patent uses feedback from error detection modules to continuously monitor actual circuit performance and adjust operating parameters accordingly. This feedback mechanism ensures that voltage and frequency are reduced only as much as the actual margins allow, preventing reliability deterioration while maximizing power efficiency
Data Source
AI summary
A method and apparatus for adaptively tuning an integrated circuit are disclosed. For example, an integrated circuit (IC) comprises a monitored path comprising circuit elements operating on a clock signal, where a last circuit element of the circuit elements comprises a first flip flop. The IC also comprises a second flip flop operating on an early clock signal, where the early clock signal is phase shifted from the clock signal, and where the second flip flop is coupled to the monitored path prior to the last circuit element. The IC also comprises a transition detection module for detecting when an output from the first flip flop toggles, and an error prediction module to detect a potential error on the monitored path. The IC comprises a controller that is configured to scale a voltage or a frequency of the IC.