Patent ID: 8437201

Claim:
A level shifter for shifting word-line select signals from a lower voltage to a higher voltage, comprising: at least one dual word-line level shifter circuit, 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, and a second transistor gated by a restore input that is driven at the higher voltage, wherein the first and second 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; a feedback circuit that maintains the control node at the higher voltage in response to the word-line select input being de-activated, and a third transistor coupled along the series path that is gated by a word-line decode input, wherein the feedback circuit includes a pair of parallel transistors gated by the word-line select input and the word-line decode input.