Patent ID: 7276932
Filing Date: 2007-10-02
Classification: H03K

Abstract:
1. An integrated power-gating cell comprising: a power node coupled to a voltage potential of a power supply; a power-gated node for selectively controlling power to logic circuitry in response to a control signal; a control output for propagating a cascading control signal; a non-power-gated control circuit having a control input receiving the control signal and a buffered control output and wherein the non-power-gated control circuit comprises an inverting logic circuit; a plurality of sequentially distributed, parallel coupled switches each having a first node coupled to the power node, a second node coupled to the power-gated node, and a gating node coupled to the buffered control output, wherein the power-gated node is coupled to and decoupled from the power node as the plurality of switches are sequentially turned ON and OFF in response to propagating logic states on the gating node and the propagating logic states are coupled to generate the cascading control signal; a latching keeper device having an input coupled to the buffered control output and an output coupled to the control input; and a capacitor coupled from the buffered control output to a ground potential voltage of the power supply.