Patent ID: 8947134
Filing Date: 2015-02-03
Classification: H03K

Abstract:
1. A circuit comprising: a first power supply line; a second power supply line; a first transistor coupled between the first and second power supply lines and having a first conductivity type; a second transistor coupled between the first and second power supply lines, coupled in series with the first transistor via a first node, and having a second conductivity type different from the first conductivity type, a third transistor coupled in parallel with the second transistor between the first node and the second power supply line, and having the second conductivity type, the second transistor and the third transistor coupled directly to the second power supply line and coupled directly to the first transistor, wherein gate terminals of the second and third transistors are coupled in common; a fourth transistor coupled between the first and second power supply lines and having the first conductivity type; a fifth transistor coupled between the first and second power supply lines, coupled in series with the fourth transistor via a second node, and having the second conductivity type, gate terminals of the fourth and fifth transistors being coupled in common with the first node; and a sixth transistor coupled in parallel with the fourth transistor between the second node and the first power supply line, and having the first conductivity type, wherein gate terminals of the fourth and sixth transistors are coupled in common, the fourth transistor and the sixth transistor coupled directly to the fifth transistor.