Semiconductor devices and method for operating the same

Abstract

A semiconductor device includes a first memory array comprising a plurality of first nominal memory cells, a plurality of first reference memory cells, and a plurality of second reference memory cells; a second memory array comprising a plurality of second nominal memory cells, a plurality of third reference memory cells, and plurality of fourth reference memory cells; an input / output (I / O) circuit physically interposed between the first memory array and the second memory array along a first lateral direction; and a controller operatively coupled to the I / O circuit, the first memory array, and the second memory array. Based on a plurality of control signals, the controller is configured to select a reference signal from one of the third reference memory cells, the fourth reference memory cells, or the second nominal memory cells, thereby allowing the I / O circuit to sense a data signal from one of the first nominal memory cells.

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