Patent ID: 7961521
Filing Date: 2011-06-14
Classification: G11C

Abstract:
1. A sensing circuit for a flash memory device, the sensing circuit comprising: a sense amplifier sensing a current flowing in an input terminal and generating an output signal according to a result of the sensing; a first current mirror connected with a bit line of a main cell array and the input terminal of the sense amplifier, the first current mirror mirroring a current flowing in the bit line of the main cell array to the input terminal of the sense amplifier; a first inverting circuit comprising an input terminal connected with the bit line of the main cell array and an output terminal connected with a power supply terminal of the first current mirror; a second current mirror connected with a bit line of a reference cell array, the second current mirror mirroring a current flowing in the bit line of the reference cell array; a second inverting circuit comprising an input terminal connected with the bit line of the reference cell array and an output terminal connected with a power supply terminal of the second current mirror; and a third current mirror mirroring the current mirrored by the second current mirror to the input terminal of the sense amplifier.