What is Power gating?
A low-power technique that switches off the supply to unused blocks, eliminating nearly all their leakage. State saving and wake-up time must be considered.
Field: Power Management
Power gating in the explanations
Power gating turns off a large transistor switch placed between the block and the supply, cutting power itself, so leakage nearly disappears too.
Which describes power gating?Power gating cuts power and so also eliminates leakage, but needs time to save and restore state and for the supply to stabilize.
Which correctly compares clock gating and power gating?Countermeasures combine high-k dielectrics, multiple threshold voltages, power gating of idle blocks, and body-bias control.
Which combination lists the main components of leakage curr…
Questions that mention Power gating (6)
- Which describes power gating?
- Which correctly compares clock gating and power gating?
- In power gating, why are a block's power switches often turned on gradually in sequence rather than all at once?
- Which combination lists the main components of leakage current in a MOSFET in the off state?
- Which low-power design technique stops the clock to unused circuit blocks to reduce wasted power?
- Which describes static (leakage) power in CMOS circuits?
Related terms
Clock gating Dynamic power GIDL (gate-induced drain leakage) CMOS Static power ACPI Activity factor Adaptive voltage scaling (AVS) Break-even time C-state