Patent ID: 8482341

Claim:
A semiconductor device comprising: a first transistor; a second transistor; a third transistor; a fourth transistor; a first capacitor; a second capacitor; and a third capacitor, wherein one of source or drain of the first transistor is electrically connected to a first wiring, wherein the other of source or drain of the first transistor is electrically connected to a first terminal of the second capacitor, wherein a gate of the first transistor is electrically connected to a first terminal of the first capacitor, wherein one of source or drain of the second transistor is electrically connected to the first terminal of the first capacitor, wherein the other of source or drain of the second transistor is electrically connected to the first terminal of the second capacitor, wherein a gate of the second transistor is electrically connected to a second terminal of the second capacitor, wherein one of source or drain of the third transistor is electrically connected to a first terminal of the third capacitor, wherein the other of source or drain of the third transistor is electrically connected to the first terminal of the second capacitor, wherein a gate of the third transistor is electrically connected to the second terminal of the second capacitor, wherein one of source or drain of the fourth transistor is electrically connected to a second wiring, wherein the other of source or drain of the fourth transistor is electrically connected to the first terminal of the second capacitor, wherein a gate of the fourth transistor is electrically connected to the first terminal of the third capacitor, wherein a second terminal of the first capacitor is electrically connected to the second terminal of the third capacitor, and wherein the fourth transistor has one of N-type conductivity or P-type conductivity, and the first transistor and the second transistor has the other of N-type conductivity or P-type conductivity.