Non-Uniform Power Switch Chain Layout for Lower IC Leakage
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Solution Overview
Problem
Existing power switch chains in integrated circuits have uniform architectures, leading to increased power consumption due to identical resistance values and areas, which do not efficiently manage leakage current during idle periods.
Innovation Solution
A power switch chain with a non-uniform architecture, comprising power switch circuits with different resistance values and areas, is designed and laid out using a processor-driven method that determines optimal positions and types based on simulation results to minimize voltage drops and circuit area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform architecture power switch chain is used, then the design and manufacturing process is simplified, but the power consumption increases due to identical resistance values not optimized for different circuit regions
Solution Approach 1:
The patent applies local quality by assigning different resistance values to power switch circuits based on their specific locations and the leakage current characteristics of the functional circuits they serve. The processor determines optimal resistance values for each power switch circuit by analyzing layout information and simulation results, creating a non-uniform distribution that optimizes power consumption for each region rather than using a uniform architecture throughout.
2Use of energy by moving object
If power switch circuits with different resistance values are used, then power consumption is reduced by optimizing leakage current management, but the device complexity increases
Solution Approach 1:
The patent implements parameter changes by varying the resistance values of power switch circuits across different locations in the integrated circuit. The processor adjusts resistance parameters based on simulated voltage drops and leakage current characteristics, creating a non-uniform resistance distribution that reduces overall power consumption while managing the complexity through automated determination methods.
Solution Approach 2:
The system performs self-service by using the processor to automatically determine optimal resistance values and positions for power switch circuits based on layout information and simulation results. This automated approach reduces manual design complexity while achieving optimized power consumption, allowing the system to self-optimize its power distribution architecture.
3Area of stationary object
If the area of power switch circuits is reduced, then the circuit area is optimized, but the voltage drop increases affecting circuit performance
Solution Approach 1:
The patent applies local quality by determining the area of each power switch circuit based on its specific location and the power consumption characteristics of the functional circuits it serves. The processor optimizes area distribution non-uniformly, allocating larger areas to regions with higher power demands and smaller areas to regions with lower demands, thereby balancing area optimization with voltage drop management.
Solution Approach 2:
The patent implements parameter changes by adjusting the area parameters of power switch circuits based on simulated performance data. The processor modifies area values to achieve optimal balance between minimizing total circuit area and maintaining acceptable voltage drop levels, creating a non-uniform area distribution that adapts to local power requirements.
Data Source
AI summary
An integrated circuit includes a functional circuit and a first power switch chain. The first power switch chain includes a first power switch circuit and a second power switch circuit and is coupled between a power source and the functional circuit. The first power switch chain is configured to receive a first control signal, and the first control signal is configured to turn on or turn off the first power switch circuit and the second power switch circuit. A first resistance value of the first power switch circuit is different from a second resistance value of the second power switch circuit.