Back to results
US 11,237,580 B1Granted
Systems and methods providing leakage reduction for power gated domains
AssigneeQUALCOMM Incorporated
InventorsGiby Samson, Foua Vang, Ramaprasath Vilangudipitchai, Seung Hyuk Kang, Venugopal Boynapalli
Life of this patent
Estimating the term…
Abstract
A system includes: a first power supply; a second power supply; a headswitch disposed between the first power supply and logic circuitry; an enable driver coupling the second power supply to a control terminal of the headswitch; and a voltage generator operable to adjust a control voltage from the second power supply to the control terminal of the headswitch in response to a first voltage level of the first power supply exceeding a reference voltage level.
Claims21
A system comprising:
- a first power supply;
- a second power supply;
- a headswitch disposed between the first power supply and logic circuitry;
- an enable driver coupling the second power supply to a control terminal of the headswitch;
- and
- a voltage generator operable to adjust a control voltage from the second power supply to the control terminal of the headswitch in response to a first voltage level of the first power supply exceeding a reference voltage level.
3 more elements
A method comprising:
- enabling a headswitch to conduct a current from a first power supply to logic circuitry;
- and
- turning off the current by disabling the headswitch, including:
- selecting a control voltage, from among a first voltage level and a second voltage level, in response to comparing the first voltage level and the second voltage level;
- and
- applying the control voltage from a second power supply to a gate of the headswitch.
3 more elements
A circuit comprising:
- a first power rail coupled to a first power supply;
- a second power rail coupled to a second power supply;
- a power gating switch coupled between the first power rail and a portion of logic circuitry of a central processing unit (CPU);
- and
- means for selecting a control voltage from the second power rail to a control terminal of the power gating switch in response to a first voltage level of the first power supply being below a reference voltage level.
2 more elements
Dependencies are inferred from the claim text.