4. Low Power Design Strategies and Techniques in Advanced Technologies
The chapter explores advanced strategies and design techniques aimed at minimizing power consumption in modern CMOS and FinFET-based integrated circuits. As device scaling approaches atomic limits, it emphasizes a multi-domain approach that integrates various techniques at the device, circuit, architecture, and system levels. Special attention is given to balancing power reduction with performance, area, and reliability in both digital and analog designs.
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What we have learnt
- The key challenge in low-power design is to minimize dynamic and static power consumption without compromising performance.
- Techniques such as dynamic voltage and frequency scaling (DVFS), clock gating, and power gating play critical roles in reducing power consumption.
- FinFET technology improves efficiency but requires specific design strategies for optimal performance.
Key Concepts
- -- Dynamic Voltage and Frequency Scaling (DVFS)
- A method to adjust the voltage and frequency dynamically based on the workload to minimize power consumption.
- -- Clock Gating
- A technique to disable the clock to idle functional blocks, thereby reducing dynamic power consumption.
- -- NearThreshold Computing (NTC)
- A strategy where circuits operate at voltages close to the threshold voltage to achieve substantial power savings.
- -- Power Gating
- A method that involves disconnecting certain blocks using sleep transistors when they are not in use to save leakage power.
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