Patent ID: 8975930
Filing Date: 2015-03-10
Classification: H01L,H03K

Abstract:
1. A semiconductor device comprising: a first transistor; a second transistor; a third transistor; a fourth transistor; a fifth transistor; and a sixth transistor, wherein the third transistor and the fourth transistor have different conductivity types, wherein the fifth transistor and the sixth transistor have different conductivity types, wherein the first transistor and the second transistor each have lower off-state current than the third transistor, the fourth transistor, the fifth transistor, and the sixth transistor, wherein a gate of the third transistor is electrically connected to a gate of the fourth transistor, wherein one of a source and a drain of the third transistor is electrically connected to a first power supply line, wherein the other of the source and the drain of the third transistor is electrically connected to one of a source and a drain of the fourth transistor and one of a source and a drain of the second transistor, wherein the other of the source and the drain of the fourth transistor is electrically connected to one of a source and a drain of the first transistor, wherein the other of the source and the drain of the first transistor is electrically connected to a second power supply line, wherein a gate of the first transistor is electrically connected to a gate of the second transistor, wherein the other of the source and the drain of the second transistor is electrically connected to a gate of the fifth transistor and a gate of the sixth transistor, wherein one of a source and a drain of the fifth transistor is electrically connected to the first power supply line, wherein the other of the source and the drain of the fifth transistor is electrically connected to one of a source and a drain of the sixth transistor, and wherein the other of the source and the drain of the sixth transistor is electrically connected to the second power supply line.