Patent ID: 8441868
Filing Date: 2013-05-14
Classification: G11C

Abstract:
1. A semiconductor device comprising a read circuit, the read circuit comprising: a first transistor; a second transistor; a first switch; and a second switch, wherein a first terminal of the first transistor is electrically connected to a gate of the first transistor, wherein a second terminal of the first transistor is electrically connected to an output of the read circuit via the first switch, wherein a first terminal of the second transistor is electrically connected to a gate of the second transistor, wherein a second terminal of the second transistor is electrically connected to the output of the read circuit via the second switch, wherein the first terminal of the first transistor is configured to be supplied with a first power supply potential and the first terminal of the second transistor is configured to be supplied with a second power supply potential, wherein a channel formation region of the first transistor comprises an oxide semiconductor, and wherein a channel formation region of the second transistor comprises silicon.