International Business Machines Corporation

John Kenneth Debrose

Thomas M Maffitt

A sense amplifier circuit for sensing a data state of a data cell during a read cycle is described. The circuit includes a first stage with first circuitry to output a reference voltage and a data voltage relating to the data state of the data cell. The circuit further includes a second stage with circuitry to amplify a difference between the reference voltage and the data voltage. This circuitry includes a plurality of inverters and a plurality of capacitors. The read cycle includes a compensation phase. During the compensation phase the circuitry stores, at the capacitors, a voltage difference caused by a device mismatch of the inverters. After the compensation phase the circuitry amplifies the difference between the reference voltage and the data voltage, and compensates for the device mismatch using the stored voltage difference at the capacitors.

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Colchester, VT, United States of America

John Kenneth Debrose