Patent ID: 8536937

Claim:
A semiconductor device comprising: a first transistor; a second transistor; a third transistor; a fourth transistor; a fifth transistor; a sixth transistor; a seventh transistor; an eighth transistor; a ninth transistor; a first capacitor; and a second capacitor, wherein one of a source electrode and a drain electrode of the first transistor and one of a source electrode and a drain electrode of the third transistor are electrically connected to a first wiring, wherein other of the source electrode and the drain electrode of the first transistor is electrically connected to one of a source electrode and a drain electrode of the second transistor, wherein other of the source electrode and the drain electrode of the third transistor is electrically connected to one of a source electrode and a drain electrode of the fourth transistor, wherein other of the source electrode and the drain electrode of the second transistor, other of the source electrode and the drain electrode of the fourth transistor, one of a source electrode and a drain electrode of the fifth transistor, one of a source electrode and a drain electrode of the sixth transistor, one of a source electrode and a drain electrode of the eighth transistor, and one of a source electrode and a drain electrode of the ninth transistor are electrically connected one another, wherein a gate electrode of the second transistor is electrically connected to a first electrode of the first capacitor, wherein other of the source electrode and the drain electrode of the fifth transistor, one of a source electrode and a drain electrode of the seventh transistor, and a second electrode of the first capacitor are electrically connected one another, wherein a gate electrode of the eighth transistor, other of other of the source electrode and the drain electrode of the ninth transistor, and a first electrode of the second capacitor are electrically connected one another, and wherein other of the source electrode and the drain electrode of the eighth transistor and a second electrode of the second capacitor are electrically connected to a second wiring.