Rotating voltage control

摘要

According to one embodiment, a system is provided that includes at least one power gated component and two or more power switch transistors configured to provide one or more conductive paths between a common power supply rail, the at least one power gated component, and a ground. The two or more power switch transistors each include a source terminal, a drain terminal, and a gate terminal configured to control current flow between the source and drain terminals. The system also includes a rotating voltage control coupled to the gate terminals and configured to apply a sequence of control signals rotating between an on-state and an off-state to each of the gate terminals while the at least one power gated component is turned on. A switch activation ratio level is programmable to set a number of power switch transistors in the on-state relative to a total number of power switch transistors.

主权项

1. A system, comprising:
at least one power gated component; two or more power switch transistors configured to provide one or more conductive paths between a common power supply rail, the at least one power gated component, and a ground, the two or more power switch transistors each comprising a source terminal, a drain terminal, and a gate terminal configured to control current flow between the source and drain terminals; and a rotating voltage control coupled to the gate terminals of the two or more power switch transistors and configured to apply a sequence of control signals rotating between an on-state and an off-state to each of the gate terminals while the at least one power gated component is turned on, and a switch activation ratio level of the rotating voltage control is programmable to set a number of the two or more power switch transistors in the on-state relative to a total number of the two or more power switch transistors, wherein the sequence of control signals applied to the gate terminals is held in a power vector as logical zeros and ones that correspond to the on-state and the off-state, and rotates over a period of time such that each of the two or more power switch transistors alternates between the on-state and the off-state over the period of time, and further wherein a number of the logical zeros and ones in the power vector remains fixed while the power vector rotates over the period of time.