Patent ID: 7489575

Claim:
A sensing circuit having a sensing node electrically coupled to a memory cell and reference node electrically coupled to a reference level, the sensing circuit comprising: an amplifier having first and second input nodes and first and second output nodes; a switching circuit having first and second switching input terminals and first and second switching output terminals, the switching circuit electrically coupled to the first and second input nodes and the first and second output nodes and operable to switch the coupling of the first and second switching input nodes to a respective one of the first and second input nodes and operable to switch the coupling of the first and second switching output nodes to a respective one of the first and second output nodes; and a comparator having an output node, and first and second input nodes electrically coupled to the first and second output terminals of the switching circuit, respectively, the comparator operable to generate an output signal having a logic state based on the relative voltage levels of the first and second output terminals of the switching circuit.