Patent ID: 7613057

Claim:
A sense amplifier circuit, comprising: a pre-charge circuit coupling a first pre-charge voltage and a pair of differential sense input nodes to pre-charge the differential sense input nodes responsive to a control input; signal pass block circuits coupled to each of a pair of data lines and to a respective one of the pair of differential sense input nodes, and passing a small signal from the respective data line to the respective differential sense input node responsive to a respective signal pass control input; a differential sensing latch circuit coupled to a first voltage supply and having an input coupled to each of the differential sense input nodes, and sensing the differential voltage between the differential sense input nodes when enabled at an enable node; and a sense enable circuit comprising a cascade coupled pair of enable transistors operable to enable the differential sensing latch circuit responsive to a first and a second control input signal, the sense enable circuit coupled to a second supply voltage; wherein the cascade coupled pair of transistors further comprises a first MOS transistor coupled to the enable node of the differential sensing latch circuit, a second MOS transistor cascade coupled to the first MOS transistor and further coupled to the voltage supply, and the first MOS transistor has an input coupled to the second control input signal.