Patent ID: 8218378

Claim:
A level shifter for shifting word-line select signals from a lower voltage to a higher voltage, comprising: a plurality of dual word-line level shifter circuits, wherein each dual word-line level shifter circuit comprises: a first transistor gated by a word-line select input that is driven at the lower voltage, a second transistor gated by a restore input that is driven at the higher voltage, and a third transistor gated by a word-line decode input, wherein the first, second and third transistors are coupled along a series path to a source at the higher voltage; a control node along the series path that is driven to ground upon activation of the word-line select input and driven to the higher voltage upon activation of the restore input; an output node that is driven to the higher voltage in response to the control node being at ground and is driven to ground in response to the control node being at the higher voltage; and a feedback circuit that maintains the control node at the higher voltage in response to the word-line select input being deactivated.