In CMOS logic, several techniques exist to minimize power consumption. Here are some commonly used techniques:
Clock Gating: Selectively disabling clock signals to unused or idle circuit portions reduces power consumption significantly.
Power Gating: Completely cutting off power from unused circuit blocks or modules when not in operation eliminates static power dissipation, resulting in substantial power savings.
Voltage Scaling: Adjusting the supply voltage to a lower value while maintaining acceptable performance helps reduce power consumption, although careful consideration of performance trade-offs and impact on circuit reliability is necessary.
Multi-Threshold CMOS: Utilizing transistors with different threshold voltage levels optimizes power consumption. High-threshold voltage transistors are used in low-power regions, while low-threshold voltage transistors are used in high-performance areas.
Leakage Power Reduction: Techniques like transistor stacking, reverse body biasing, and optimal transistor sizing mitigate leakage power, a significant contributor to overall power consumption in CMOS circuits.
By implementing these techniques, power consumption can be effectively minimized in CMOS logic circuits, enabling energy-efficient designs.