Patent ID: 9589961
Date: 2017-03-07
CPC Classifications: G11C,H01L

Claim:
1. A semiconductor device comprising: a first transistor; a second transistor; a third transistor; a fourth transistor; a first capacitor; and a second capacitor, wherein a channel formation region of the third transistor and a channel formation region of the fourth transistor each comprise an oxide semiconductor, wherein one of a source and a drain of the first transistor is electrically connected to one of a source and a drain of the second transistor, wherein the first transistor and the second transistor are electrically connected in series, wherein one of a source and a drain of the third transistor is electrically connected to a gate of the first transistor, wherein one of a source and a drain of the fourth transistor is electrically connected to a gate of the second transistor, wherein one of a pair of electrodes of the first capacitor is electrically connected to the gate of the first transistor, wherein one of a pair of electrodes of the second capacitor is electrically connected to the gate of the second transistor, wherein the other of the pair of electrodes of the first capacitor is electrically connected to a first wiring, and wherein the other of the pair of electrodes of the second capacitor is electrically connected to a second wiring.